AbstractJdbc1DatabaseMetaData.java 105 KB
Newer Older
Peter Mount's avatar
Peter Mount committed
1 2 3 4 5 6
package org.postgresql.jdbc1;


import java.sql.*;
import java.util.*;
import org.postgresql.Field;
Bruce Momjian's avatar
>  
Bruce Momjian committed
7
import org.postgresql.util.PSQLException;
8
import org.postgresql.Driver;
Peter Mount's avatar
Peter Mount committed
9

10
public abstract class AbstractJdbc1DatabaseMetaData
Peter Mount's avatar
Peter Mount committed
11
{
12

13 14 15 16 17 18 19 20 21
  private static final String keywords = "abort,acl,add,aggregate,append,archive," +
                                         "arch_store,backward,binary,change,cluster,"+
                                         "copy,database,delimiter,delimiters,do,extend,"+
                                         "explain,forward,heavy,index,inherits,isnull,"+
                                         "light,listen,load,merge,nothing,notify,"+
                                         "notnull,oids,purge,rename,replace,retrieve,"+
                                         "returns,rule,recipe,setof,stdin,stdout,store,"+
                                         "vacuum,verbose,version";

22
	protected AbstractJdbc1Connection connection; // The connection association
23 24

	// These define various OID's. Hopefully they will stay constant.
25 26 27 28 29
	protected static final int iVarcharOid = 1043;	// OID for varchar
	protected static final int iBoolOid = 16; // OID for bool
	protected static final int iInt2Oid = 21; // OID for int2
	protected static final int iInt4Oid = 23; // OID for int4
	protected static final int VARHDRSZ = 4;	// length for int4
30

31
	public AbstractJdbc1DatabaseMetaData(AbstractJdbc1Connection conn)
32
	{
33
          this.connection = conn;
34 35
	}

36
	/*
37 38 39 40 41 42 43 44
	 * Can all the procedures returned by getProcedures be called
	 * by the current user?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean allProceduresAreCallable() throws SQLException
	{
45 46
          if (Driver.logDebug) Driver.debug("allProceduresAreCallable");
          return true;		// For now...
47 48
	}

49
	/*
50 51 52 53 54 55 56 57
	 * Can all the tables returned by getTable be SELECTed by
	 * the current user?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean allTablesAreSelectable() throws SQLException
	{
58
          if (Driver.logDebug) Driver.debug("allTablesAreSelectable");
59 60 61
		return true;		// For now...
	}

62
	/*
63 64 65 66 67 68 69
	 * What is the URL for this database?
	 *
	 * @return the url or null if it cannott be generated
	 * @exception SQLException if a database access error occurs
	 */
	public String getURL() throws SQLException
	{
70 71 72
          String url = connection.getURL();
          if (Driver.logDebug) Driver.debug("getURL " + url);
          return url;
73 74
	}

75
	/*
76 77 78 79 80 81 82
	 * What is our user name as known to the database?
	 *
	 * @return our database user name
	 * @exception SQLException if a database access error occurs
	 */
	public String getUserName() throws SQLException
	{
83 84 85
          String userName = connection.getUserName();
          if (Driver.logDebug) Driver.debug("getUserName " + userName);
          return userName;
86 87
	}

88
	/*
89 90 91 92 93 94 95
	 * Is the database in read-only mode?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean isReadOnly() throws SQLException
	{
96 97 98
          boolean isReadOnly = connection.isReadOnly();
          if (Driver.logDebug) Driver.debug("isReadOnly " + isReadOnly);
          return isReadOnly;
99 100
	}

101
	/*
102 103 104 105 106 107 108
	 * Are NULL values sorted high?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean nullsAreSortedHigh() throws SQLException
	{
109 110 111
          boolean nullSortedHigh = connection.haveMinimumServerVersion("7.2");
          if (Driver.logDebug) Driver.debug("nullsAreSortedHigh " + nullSortedHigh);
          return nullSortedHigh;
112 113
	}

114
	/*
115 116 117 118 119 120 121
	 * Are NULL values sorted low?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean nullsAreSortedLow() throws SQLException
	{
122 123
          if (Driver.logDebug) Driver.debug("nullsAreSortedLow false");
          return false;
124 125
	}

126
	/*
127 128 129 130 131 132 133
	 * Are NULL values sorted at the start regardless of sort order?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean nullsAreSortedAtStart() throws SQLException
	{
134 135
          if (Driver.logDebug) Driver.debug("nullsAreSortedAtStart false");
          return false;
136 137
	}

138
	/*
139 140 141 142 143 144 145
	 * Are NULL values sorted at the end regardless of sort order?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean nullsAreSortedAtEnd() throws SQLException
	{
146 147 148
          boolean nullsAreSortedAtEnd = ! connection.haveMinimumServerVersion("7.2");
          if (Driver.logDebug) Driver.debug("nullsAreSortedAtEnd " + nullsAreSortedAtEnd);
          return nullsAreSortedAtEnd;
149 150
	}

151
	/*
152 153 154 155 156 157 158 159
	 * What is the name of this database product - we hope that it is
	 * PostgreSQL, so we return that explicitly.
	 *
	 * @return the database product name
	 * @exception SQLException if a database access error occurs
	 */
	public String getDatabaseProductName() throws SQLException
	{
160 161
          if (Driver.logDebug) Driver.debug("getDatabaseProductName PostgresSQL");
          return "PostgreSQL";
162 163
	}

164
	/*
165 166 167 168 169 170 171
	 * What is the version of this database product.
	 *
	 * @return the database version
	 * @exception SQLException if a database access error occurs
	 */
	public String getDatabaseProductVersion() throws SQLException
	{
172 173 174
          String versionNumber = connection.getDBVersionNumber();
          if (Driver.logDebug) Driver.debug("getDatabaseProductVersion " + versionNumber);
          return versionNumber;
175 176
	}

177
	/*
178 179 180 181 182 183 184 185
	 * What is the name of this JDBC driver?  If we don't know this
	 * we are doing something wrong!
	 *
	 * @return the JDBC driver name
	 * @exception SQLException why?
	 */
	public String getDriverName() throws SQLException
	{
186 187 188
          String driverName = "PostgreSQL Native Driver";
          if (Driver.logDebug) Driver.debug("getDriverName" + driverName);
          return driverName;
189 190
	}

191
	/*
192 193 194 195 196 197 198 199
	 * What is the version string of this JDBC driver?	Again, this is
	 * static.
	 *
	 * @return the JDBC driver name.
	 * @exception SQLException why?
	 */
	public String getDriverVersion() throws SQLException
	{
200 201 202
          String driverVersion = connection.this_driver.getVersion();
          if (Driver.logDebug) Driver.debug("getDriverVersion " + driverVersion);
          return driverVersion;
203 204
	}

205
	/*
206 207 208 209 210 211
	 * What is this JDBC driver's major version number?
	 *
	 * @return the JDBC driver major version
	 */
	public int getDriverMajorVersion()
	{
212 213 214
          int majorVersion = connection.this_driver.getMajorVersion();
          if (Driver.logDebug) Driver.debug("getMajorVersion " + majorVersion);
          return majorVersion;
215 216
	}

217
	/*
218 219 220 221 222 223
	 * What is this JDBC driver's minor version number?
	 *
	 * @return the JDBC driver minor version
	 */
	public int getDriverMinorVersion()
	{
224 225 226
          int minorVersion = connection.this_driver.getMinorVersion();
          if (Driver.logDebug) Driver.debug("getMinorVersion " + minorVersion);
          return minorVersion;
227 228
	}

229
	/*
230 231 232 233 234 235 236 237
	 * Does the database store tables in a local file?	No - it
	 * stores them in a file on the server.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean usesLocalFiles() throws SQLException
	{
238 239
          if (Driver.logDebug) Driver.debug("usesLocalFiles " + false);
          return false;
240 241
	}

242
	/*
243 244 245 246 247 248 249 250
	 * Does the database use a file for each table?  Well, not really,
	 * since it doesnt use local files.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean usesLocalFilePerTable() throws SQLException
	{
251 252
          if (Driver.logDebug) Driver.debug("usesLocalFilePerTable " + false);
          return false;
253 254
	}

255
	/*
256 257 258 259 260 261 262 263 264 265 266 267 268
	 * Does the database treat mixed case unquoted SQL identifiers
	 * as case sensitive and as a result store them in mixed case?
	 * A JDBC-Compliant driver will always return false.
	 *
	 * <p>Predicament - what do they mean by "SQL identifiers" - if it
	 * means the names of the tables and columns, then the answers
	 * given below are correct - otherwise I don't know.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsMixedCaseIdentifiers() throws SQLException
	{
269 270
          if (Driver.logDebug) Driver.debug("supportsMixedCaseIdentifiers " + false);
          return false;
271 272
	}

273
	/*
274 275 276 277 278 279 280
	 * Does the database treat mixed case unquoted SQL identifiers as
	 * case insensitive and store them in upper case?
	 *
	 * @return true if so
	 */
	public boolean storesUpperCaseIdentifiers() throws SQLException
	{
281 282
          if (Driver.logDebug) Driver.debug("storesUpperCaseIdentifiers " + false);
          return false;
283 284
	}

285
	/*
286 287 288 289 290 291 292
	 * Does the database treat mixed case unquoted SQL identifiers as
	 * case insensitive and store them in lower case?
	 *
	 * @return true if so
	 */
	public boolean storesLowerCaseIdentifiers() throws SQLException
	{
293 294
          if (Driver.logDebug) Driver.debug("storesLowerCaseIdentifiers " + true);
          return true;
295 296
	}

297
	/*
298 299 300 301 302 303 304
	 * Does the database treat mixed case unquoted SQL identifiers as
	 * case insensitive and store them in mixed case?
	 *
	 * @return true if so
	 */
	public boolean storesMixedCaseIdentifiers() throws SQLException
	{
305 306
          if (Driver.logDebug) Driver.debug("storesMixedCaseIdentifiers " + false);
          return false;
307 308
	}

309
	/*
310 311 312 313 314 315 316 317 318
	 * Does the database treat mixed case quoted SQL identifiers as
	 * case sensitive and as a result store them in mixed case?  A
	 * JDBC compliant driver will always return true.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsMixedCaseQuotedIdentifiers() throws SQLException
	{
319 320
          if (Driver.logDebug) Driver.debug("supportsMixedCaseQuotedIdentifiers " + true);
          return true;
321 322
	}

323
	/*
324 325 326 327 328 329 330
	 * Does the database treat mixed case quoted SQL identifiers as
	 * case insensitive and store them in upper case?
	 *
	 * @return true if so
	 */
	public boolean storesUpperCaseQuotedIdentifiers() throws SQLException
	{
331 332
          if (Driver.logDebug) Driver.debug("storesUpperCaseQuotedIdentifiers " + false);
          return false;
333 334
	}

335
	/*
336 337 338 339 340 341 342
	 * Does the database treat mixed case quoted SQL identifiers as case
	 * insensitive and store them in lower case?
	 *
	 * @return true if so
	 */
	public boolean storesLowerCaseQuotedIdentifiers() throws SQLException
	{
343 344
          if (Driver.logDebug) Driver.debug("storesLowerCaseQuotedIdentifiers " + false);
          return false;
345 346
	}

347
	/*
348 349 350 351 352 353 354
	 * Does the database treat mixed case quoted SQL identifiers as case
	 * insensitive and store them in mixed case?
	 *
	 * @return true if so
	 */
	public boolean storesMixedCaseQuotedIdentifiers() throws SQLException
	{
355 356
          if (Driver.logDebug) Driver.debug("storesMixedCaseQuotedIdentifiers " + false);
          return false;
357 358
	}

359
	/*
360 361 362 363 364 365 366 367 368
	 * What is the string used to quote SQL identifiers?  This returns
	 * a space if identifier quoting isn't supported.  A JDBC Compliant
	 * driver will always use a double quote character.
	 *
	 * @return the quoting string
	 * @exception SQLException if a database access error occurs
	 */
	public String getIdentifierQuoteString() throws SQLException
	{
369 370
          if (Driver.logDebug) Driver.debug("getIdentifierQuoteString \"" );
          return "\"";
371 372
	}

373
	/*
374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390
	 * Get a comma separated list of all a database's SQL keywords that
	 * are NOT also SQL92 keywords.
	 *
	 * <p>Within PostgreSQL, the keywords are found in
	 *	src/backend/parser/keywords.c
	 *
	 * <p>For SQL Keywords, I took the list provided at
	 *	<a href="http://web.dementia.org/~shadow/sql/sql3bnf.sep93.txt">
	 * http://web.dementia.org/~shadow/sql/sql3bnf.sep93.txt</a>
	 * which is for SQL3, not SQL-92, but it is close enough for
	 * this purpose.
	 *
	 * @return a comma separated list of keywords we use
	 * @exception SQLException if a database access error occurs
	 */
	public String getSQLKeywords() throws SQLException
	{
391
		return keywords;
392 393 394 395
	}

	public String getNumericFunctions() throws SQLException
	{
396 397
          if (Driver.logDebug) Driver.debug("getNumericFunctions");
          return "";
398 399 400 401
	}

	public String getStringFunctions() throws SQLException
	{
402 403
          if (Driver.logDebug) Driver.debug("getStringFunctions");
          return "";
404 405 406 407
	}

	public String getSystemFunctions() throws SQLException
	{
408 409
          if (Driver.logDebug) Driver.debug("getSystemFunctions");
          return "";
410 411 412 413
	}

	public String getTimeDateFunctions() throws SQLException
	{
414 415
          if (Driver.logDebug) Driver.debug("getTimeDateFunctions");
          return "";
416 417
	}

418
	/*
419 420 421 422 423 424 425 426
	 * This is the string that can be used to escape '_' and '%' in
	 * a search string pattern style catalog search parameters
	 *
	 * @return the string used to escape wildcard characters
	 * @exception SQLException if a database access error occurs
	 */
	public String getSearchStringEscape() throws SQLException
	{
427 428
          if (Driver.logDebug) Driver.debug("getSearchStringEscape");
          return "\\";
429 430
	}

431
	/*
432 433 434 435 436 437 438 439 440 441 442 443
	 * Get all the "extra" characters that can be used in unquoted
	 * identifier names (those beyond a-zA-Z0-9 and _)
	 *
	 * <p>From the file src/backend/parser/scan.l, an identifier is
	 * {letter}{letter_or_digit} which makes it just those listed
	 * above.
	 *
	 * @return a string containing the extra characters
	 * @exception SQLException if a database access error occurs
	 */
	public String getExtraNameCharacters() throws SQLException
	{
444 445
          if (Driver.logDebug) Driver.debug("getExtraNameCharacters");
          return "";
446 447
	}

448
	/*
449 450 451 452 453 454 455 456
	 * Is "ALTER TABLE" with an add column supported?
	 * Yes for PostgreSQL 6.1
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsAlterTableWithAddColumn() throws SQLException
	{
457 458
          if (Driver.logDebug) Driver.debug("supportsAlterTableWithAddColumn " + true);
          return true;
459 460
	}

461
	/*
462 463 464 465 466 467 468 469
	 * Is "ALTER TABLE" with a drop column supported?
	 * Peter 10/10/2000 This was set to true, but 7.1devel doesn't support it!
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsAlterTableWithDropColumn() throws SQLException
	{
470
          if (Driver.logDebug) Driver.debug("supportsAlterTableWithDropColumn " + false);
471 472 473
		return false;
	}

474
	/*
475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493
	 * Is column aliasing supported?
	 *
	 * <p>If so, the SQL AS clause can be used to provide names for
	 * computed columns or to provide alias names for columns as
	 * required.  A JDBC Compliant driver always returns true.
	 *
	 * <p>e.g.
	 *
	 * <br><pre>
	 * select count(C) as C_COUNT from T group by C;
	 *
	 * </pre><br>
	 * should return a column named as C_COUNT instead of count(C)
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsColumnAliasing() throws SQLException
	{
494 495
          if (Driver.logDebug) Driver.debug("supportsColumnAliasing " + true);
          return true;
496 497
	}

498
	/*
499 500 501 502 503 504 505 506
	 * Are concatenations between NULL and non-NULL values NULL?  A
	 * JDBC Compliant driver always returns true
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean nullPlusNonNullIsNull() throws SQLException
	{
507 508
          if (Driver.logDebug) Driver.debug("nullPlusNonNullIsNull " + true);
          return true;
509 510 511 512
	}

	public boolean supportsConvert() throws SQLException
	{
513 514
          if (Driver.logDebug) Driver.debug("supportsConvert " + false);
          return false;
515 516 517 518
	}

	public boolean supportsConvert(int fromType, int toType) throws SQLException
	{
519 520
          if (Driver.logDebug) Driver.debug("supportsConvert " + false);
          return false;
521 522
	}

523
	/*
524 525 526 527 528 529 530 531
	 * Are table correlation names supported? A JDBC Compliant
	 * driver always returns true.
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsTableCorrelationNames() throws SQLException
	{
532 533
          if (Driver.logDebug) Driver.debug("supportsTableCorrelationNames " + true);
          return true;
534 535
	}

536
	/*
537 538 539 540 541 542 543 544
	 * If table correlation names are supported, are they restricted to
	 * be different from the names of the tables?
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsDifferentTableCorrelationNames() throws SQLException
	{
545 546
          if (Driver.logDebug) Driver.debug("supportsDifferentTableCorrelationNames " + false);
          return false;
547 548
	}

549
	/*
550 551 552 553 554 555 556 557 558
	 * Are expressions in "ORDER BY" lists supported?
	 *
	 * <br>e.g. select * from t order by a + b;
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsExpressionsInOrderBy() throws SQLException
	{
559 560
          if (Driver.logDebug) Driver.debug("supportsExpressionsInOrderBy " + true);
          return true;
561 562
	}

563
	/*
564 565 566 567 568 569 570
	 * Can an "ORDER BY" clause use columns not in the SELECT?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsOrderByUnrelated() throws SQLException
	{
571 572 573
          boolean supportsOrderByUnrelated = connection.haveMinimumServerVersion("6.4");
          if (Driver.logDebug) Driver.debug("supportsOrderByUnrelated " + supportsOrderByUnrelated);
          return supportsOrderByUnrelated;
574 575
	}

576
	/*
577 578 579 580 581 582 583 584
	 * Is some form of "GROUP BY" clause supported?
	 * I checked it, and yes it is.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsGroupBy() throws SQLException
	{
585 586
          if (Driver.logDebug) Driver.debug("supportsGroupBy " + true);
          return true;
587 588
	}

589
	/*
590 591 592 593 594 595 596
	 * Can a "GROUP BY" clause use columns not in the SELECT?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsGroupByUnrelated() throws SQLException
	{
597 598 599
          boolean supportsGroupByUnrelated = connection.haveMinimumServerVersion("6.4");
          if (Driver.logDebug) Driver.debug("supportsGroupByUnrelated " + supportsGroupByUnrelated);
          return supportsGroupByUnrelated;
600 601
	}

602
	/*
603 604 605 606 607 608 609 610 611 612 613
	 * Can a "GROUP BY" clause add columns not in the SELECT provided
	 * it specifies all the columns in the SELECT?	Does anyone actually
	 * understand what they mean here?
	 *
	 * (I think this is a subset of the previous function. -- petere)
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsGroupByBeyondSelect() throws SQLException
	{
614 615 616
          boolean supportsGroupByBeyondSelect = connection.haveMinimumServerVersion("6.4");
          if (Driver.logDebug) Driver.debug("supportsGroupByUnrelated " + supportsGroupByBeyondSelect);
          return supportsGroupByBeyondSelect;
617 618
	}

619
	/*
620 621 622 623 624 625 626 627
	 * Is the escape character in "LIKE" clauses supported?  A
	 * JDBC compliant driver always returns true.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsLikeEscapeClause() throws SQLException
	{
628 629 630
          boolean supportsLikeEscapeClause = connection.haveMinimumServerVersion("7.1");
          if (Driver.logDebug) Driver.debug("supportsLikeEscapeClause " + supportsLikeEscapeClause);
          return supportsLikeEscapeClause;
631 632
	}

633
	/*
634 635 636 637 638 639 640 641 642
	 * Are multiple ResultSets from a single execute supported?
	 * Well, I implemented it, but I dont think this is possible from
	 * the back ends point of view.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsMultipleResultSets() throws SQLException
	{
643 644
          if (Driver.logDebug) Driver.debug("supportsMultipleResultSets " + false);
          return false;
645 646
	}

647
	/*
648 649 650 651 652 653 654 655 656
	 * Can we have multiple transactions open at once (on different
	 * connections?)
	 * I guess we can have, since Im relying on it.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsMultipleTransactions() throws SQLException
	{
657 658
          if (Driver.logDebug) Driver.debug("supportsMultipleTransactions " + true);
          return true;
659 660
	}

661
	/*
662 663 664 665 666 667 668 669 670 671 672
	 * Can columns be defined as non-nullable.	A JDBC Compliant driver
	 * always returns true.
	 *
	 * <p>This changed from false to true in v6.2 of the driver, as this
	 * support was added to the backend.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsNonNullableColumns() throws SQLException
	{
673 674
          if (Driver.logDebug) Driver.debug("supportsNonNullableColumns true");
          return true;
675 676
	}

677
	/*
678 679 680 681 682 683 684 685 686 687 688 689 690
	 * Does this driver support the minimum ODBC SQL grammar.  This
	 * grammar is defined at:
	 *
	 * <p><a href="http://www.microsoft.com/msdn/sdk/platforms/doc/odbc/src/intropr.htm">http://www.microsoft.com/msdn/sdk/platforms/doc/odbc/src/intropr.htm</a>
	 *
	 * <p>In Appendix C.  From this description, we seem to support the
	 * ODBC minimal (Level 0) grammar.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsMinimumSQLGrammar() throws SQLException
	{
691 692
          if (Driver.logDebug) Driver.debug("supportsMinimumSQLGrammar TRUE");
          return true;
693 694
	}

695
	/*
696 697 698 699 700 701 702 703
	 * Does this driver support the Core ODBC SQL grammar.	We need
	 * SQL-92 conformance for this.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsCoreSQLGrammar() throws SQLException
	{
704 705
          if (Driver.logDebug) Driver.debug("supportsCoreSQLGrammar FALSE ");
          return false;
706 707
	}

708
	/*
709 710 711 712 713 714 715 716 717
	 * Does this driver support the Extended (Level 2) ODBC SQL
	 * grammar.  We don't conform to the Core (Level 1), so we can't
	 * conform to the Extended SQL Grammar.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsExtendedSQLGrammar() throws SQLException
	{
718 719
          if (Driver.logDebug) Driver.debug("supportsExtendedSQLGrammar FALSE");
          return false;
720 721
	}

722
	/*
723 724 725 726 727 728 729 730 731 732 733 734 735
	 * Does this driver support the ANSI-92 entry level SQL grammar?
	 * All JDBC Compliant drivers must return true. We currently
	 * report false until 'schema' support is added.  Then this
	 * should be changed to return true, since we will be mostly
	 * compliant (probably more compliant than many other databases)
	 * And since this is a requirement for all JDBC drivers we
	 * need to get to the point where we can return true.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsANSI92EntryLevelSQL() throws SQLException
	{
736 737 738
          boolean schemas = connection.haveMinimumServerVersion("7.3");
          if (Driver.logDebug) Driver.debug("supportsANSI92EntryLevelSQL " + schemas);
          return schemas;
739 740
	}

741
	/*
742 743 744 745 746 747 748 749
	 * Does this driver support the ANSI-92 intermediate level SQL
	 * grammar?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsANSI92IntermediateSQL() throws SQLException
	{
750 751
          if (Driver.logDebug) Driver.debug("supportsANSI92IntermediateSQL false ");
          return false;
752 753
	}

754
	/*
755 756 757 758 759 760 761
	 * Does this driver support the ANSI-92 full SQL grammar?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsANSI92FullSQL() throws SQLException
	{
762 763
          if (Driver.logDebug) Driver.debug("supportsANSI92FullSQL false ");
          return false;
764 765
	}

766
	/*
767 768 769 770 771 772 773 774
	 * Is the SQL Integrity Enhancement Facility supported?
	 * I haven't seen this mentioned anywhere, so I guess not
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsIntegrityEnhancementFacility() throws SQLException
	{
775 776
          if (Driver.logDebug) Driver.debug("supportsIntegrityEnhancementFacility false ");
          return false;
777 778
	}

779
	/*
780 781 782 783 784 785 786
	 * Is some form of outer join supported?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsOuterJoins() throws SQLException
	{
787 788 789
          boolean supportsOuterJoins = connection.haveMinimumServerVersion("7.1");
          if (Driver.logDebug) Driver.debug("supportsOuterJoins " + supportsOuterJoins);
          return supportsOuterJoins;
790 791
	}

792
	/*
793 794 795 796 797 798 799
	 * Are full nexted outer joins supported?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsFullOuterJoins() throws SQLException
	{
800 801 802
          boolean supportsFullOuterJoins = connection.haveMinimumServerVersion("7.1");
          if (Driver.logDebug) Driver.debug("supportsFullOuterJoins " + supportsFullOuterJoins);
          return supportsFullOuterJoins;
803 804
	}

805
	/*
806 807 808 809 810 811 812
	 * Is there limited support for outer joins?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsLimitedOuterJoins() throws SQLException
	{
813 814 815
          boolean supportsLimitedOuterJoins = connection.haveMinimumServerVersion("7.1");
          if (Driver.logDebug) Driver.debug("supportsFullOuterJoins " + supportsLimitedOuterJoins);
          return supportsLimitedOuterJoins;
816 817
	}

818
	/*
819 820 821 822 823 824 825 826 827
	 * What is the database vendor's preferred term for "schema"?
	 * PostgreSQL doesn't have schemas, but when it does, we'll use the
	 * term "schema".
	 *
	 * @return the vendor term
	 * @exception SQLException if a database access error occurs
	 */
	public String getSchemaTerm() throws SQLException
	{
828 829
          if (Driver.logDebug) Driver.debug("getSchemaTerm schema");
          return "schema";
830 831
	}

832
	/*
833 834 835 836 837 838 839 840
	 * What is the database vendor's preferred term for "procedure"?
	 * Traditionally, "function" has been used.
	 *
	 * @return the vendor term
	 * @exception SQLException if a database access error occurs
	 */
	public String getProcedureTerm() throws SQLException
	{
841 842
          if (Driver.logDebug) Driver.debug("getProcedureTerm function ");
          return "function";
843 844
	}

845
	/*
846 847 848 849 850 851 852
	 * What is the database vendor's preferred term for "catalog"?
	 *
	 * @return the vendor term
	 * @exception SQLException if a database access error occurs
	 */
	public String getCatalogTerm() throws SQLException
	{
853 854
          if (Driver.logDebug) Driver.debug("getCatalogTerm database ");
          return "database";
855 856
	}

857
	/*
858 859 860 861 862 863 864 865
	 * Does a catalog appear at the start of a qualified table name?
	 * (Otherwise it appears at the end).
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean isCatalogAtStart() throws SQLException
	{
866 867 868 869
          // return true here; we return false for every other catalog function
          // so it won't matter what we return here D.C.
          if (Driver.logDebug) Driver.debug("isCatalogAtStart not implemented");
          return true;
870 871
	}

872
	/*
873 874 875 876 877 878 879
	 * What is the Catalog separator.
	 *
	 * @return the catalog separator string
	 * @exception SQLException if a database access error occurs
	 */
	public String getCatalogSeparator() throws SQLException
	{
880 881 882 883
          // Give them something to work with here
          // everything else returns false so it won't matter what we return here D.C.
          if (Driver.logDebug) Driver.debug("getCatalogSeparator not implemented ");
          return ".";
884 885
	}

886
	/*
887 888 889 890 891 892 893
	 * Can a schema name be used in a data manipulation statement?	Nope.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsSchemasInDataManipulation() throws SQLException
	{
894 895
          if (Driver.logDebug) Driver.debug("supportsSchemasInDataManipulation false");
          return false;
896 897
	}

898
	/*
899 900 901 902 903 904 905
	 * Can a schema name be used in a procedure call statement?  Nope.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsSchemasInProcedureCalls() throws SQLException
	{
906 907
          if (Driver.logDebug) Driver.debug("supportsSchemasInProcedureCalls false");
          return false;
908 909
	}

910
	/*
911 912 913 914 915 916 917
	 * Can a schema be used in a table definition statement?  Nope.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsSchemasInTableDefinitions() throws SQLException
	{
918 919 920 921
          boolean schemas = connection.haveMinimumServerVersion("7.3");

          if (Driver.logDebug) Driver.debug("supportsSchemasInTableDefinitions " + schemas);
          return schemas;
922 923
	}

924
	/*
925 926 927 928 929 930 931
	 * Can a schema name be used in an index definition statement?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsSchemasInIndexDefinitions() throws SQLException
	{
932 933
          if (Driver.logDebug) Driver.debug("supportsSchemasInIndexDefinitions false");
          return false;
934 935
	}

936
	/*
937 938 939 940 941 942 943
	 * Can a schema name be used in a privilege definition statement?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsSchemasInPrivilegeDefinitions() throws SQLException
	{
944 945
          if (Driver.logDebug) Driver.debug("supportsSchemasInPrivilegeDefinitions false");
          return false;
946 947
	}

948
	/*
949 950 951 952 953 954 955
	 * Can a catalog name be used in a data manipulation statement?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsCatalogsInDataManipulation() throws SQLException
	{
956 957
          if (Driver.logDebug) Driver.debug("supportsCatalogsInDataManipulation false");
          return false;
958 959
	}

960
	/*
961 962 963 964 965 966 967
	 * Can a catalog name be used in a procedure call statement?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsCatalogsInProcedureCalls() throws SQLException
	{
968 969
          if (Driver.logDebug) Driver.debug("supportsCatalogsInDataManipulation false");
          return false;
970 971
	}

972
	/*
973 974 975 976 977 978 979
	 * Can a catalog name be used in a table definition statement?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsCatalogsInTableDefinitions() throws SQLException
	{
980 981
          if (Driver.logDebug) Driver.debug("supportsCatalogsInTableDefinitions false");
          return false;
982 983
	}

984
	/*
985 986 987 988 989 990 991
	 * Can a catalog name be used in an index definition?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsCatalogsInIndexDefinitions() throws SQLException
	{
992 993
          if (Driver.logDebug) Driver.debug("supportsCatalogsInIndexDefinitions false");
          return false;
994 995
	}

996
	/*
997 998 999 1000 1001 1002 1003
	 * Can a catalog name be used in a privilege definition statement?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsCatalogsInPrivilegeDefinitions() throws SQLException
	{
1004 1005
          if (Driver.logDebug) Driver.debug("supportsCatalogsInPrivilegeDefinitions false");
          return false;
1006 1007
	}

1008
	/*
1009 1010 1011 1012 1013 1014 1015 1016
	 * We support cursors for gets only it seems.  I dont see a method
	 * to get a positioned delete.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsPositionedDelete() throws SQLException
	{
1017 1018
          if (Driver.logDebug) Driver.debug("supportsPositionedDelete false");
          return false;			// For now...
1019 1020
	}

1021
	/*
1022 1023 1024 1025 1026 1027 1028
	 * Is positioned UPDATE supported?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsPositionedUpdate() throws SQLException
	{
1029 1030
          if (Driver.logDebug) Driver.debug("supportsPositionedUpdate false");
          return false;			// For now...
1031 1032
	}

1033
	/*
1034 1035 1036 1037 1038 1039 1040
	 * Is SELECT for UPDATE supported?
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsSelectForUpdate() throws SQLException
	{
1041
          return connection.haveMinimumServerVersion("6.5");
1042 1043
	}

1044
	/*
1045 1046 1047 1048 1049 1050 1051 1052
	 * Are stored procedure calls using the stored procedure escape
	 * syntax supported?
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsStoredProcedures() throws SQLException
	{
1053
          return false;
1054 1055
	}

1056
	/*
1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067
	 * Are subqueries in comparison expressions supported? A JDBC
	 * Compliant driver always returns true.
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsSubqueriesInComparisons() throws SQLException
	{
		return true;
	}

1068
	/*
1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079
	 * Are subqueries in 'exists' expressions supported? A JDBC
	 * Compliant driver always returns true.
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsSubqueriesInExists() throws SQLException
	{
		return true;
	}

1080
	/*
1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091
	 * Are subqueries in 'in' statements supported? A JDBC
	 * Compliant driver always returns true.
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsSubqueriesInIns() throws SQLException
	{
		return true;
	}

1092
	/*
1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106
	 * Are subqueries in quantified expressions supported? A JDBC
	 * Compliant driver always returns true.
	 *
	 * (No idea what this is, but we support a good deal of
	 * subquerying.)
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsSubqueriesInQuantifieds() throws SQLException
	{
		return true;
	}

1107
	/*
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120
	 * Are correlated subqueries supported? A JDBC Compliant driver
	 * always returns true.
	 *
	 * (a.k.a. subselect in from?)
	 *
	 * @return true if so; false otherwise
	 * @exception SQLException - if a database access error occurs
	 */
	public boolean supportsCorrelatedSubqueries() throws SQLException
	{
		return connection.haveMinimumServerVersion("7.1");
	}

1121
	/*
1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
	 * Is SQL UNION supported?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsUnion() throws SQLException
	{
		return true; // since 6.3
	}

1132
	/*
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142
	 * Is SQL UNION ALL supported?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsUnionAll() throws SQLException
	{
		return connection.haveMinimumServerVersion("7.1");
	}

1143
	/*
1144 1145 1146 1147 1148 1149 1150 1151 1152 1153
	 * In PostgreSQL, Cursors are only open within transactions.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsOpenCursorsAcrossCommit() throws SQLException
	{
		return false;
	}

1154
	/*
1155 1156 1157 1158 1159 1160 1161 1162 1163 1164
	 * Do we support open cursors across multiple transactions?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsOpenCursorsAcrossRollback() throws SQLException
	{
		return false;
	}

1165
	/*
1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178
	 * Can statements remain open across commits?  They may, but
	 * this driver cannot guarentee that.  In further reflection.
	 * we are talking a Statement object here, so the answer is
	 * yes, since the Statement is only a vehicle to ExecSQL()
	 *
	 * @return true if they always remain open; false otherwise
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsOpenStatementsAcrossCommit() throws SQLException
	{
		return true;
	}

1179
	/*
1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
	 * Can statements remain open across rollbacks?  They may, but
	 * this driver cannot guarentee that.  In further contemplation,
	 * we are talking a Statement object here, so the answer is yes,
	 * since the Statement is only a vehicle to ExecSQL() in Connection
	 *
	 * @return true if they always remain open; false otherwise
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsOpenStatementsAcrossRollback() throws SQLException
	{
		return true;
	}

1193
	/*
1194 1195 1196 1197 1198 1199 1200 1201 1202 1203
	 * How many hex characters can you have in an inline binary literal
	 *
	 * @return the max literal length
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxBinaryLiteralLength() throws SQLException
	{
		return 0; // no limit
	}

1204
	/*
1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215
	 * What is the maximum length for a character literal
	 * I suppose it is 8190 (8192 - 2 for the quotes)
	 *
	 * @return the max literal length
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxCharLiteralLength() throws SQLException
	{
		return 0; // no limit
	}

1216
	/*
1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228
	 * Whats the limit on column name length.  The description of
	 * pg_class would say '32' (length of pg_class.relname) - we
	 * should probably do a query for this....but....
	 *
	 * @return the maximum column name length
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxColumnNameLength() throws SQLException
	{
		return 32;
	}

1229
	/*
1230 1231 1232 1233 1234 1235 1236 1237 1238 1239
	 * What is the maximum number of columns in a "GROUP BY" clause?
	 *
	 * @return the max number of columns
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxColumnsInGroupBy() throws SQLException
	{
		return 0; // no limit
	}

1240
	/*
1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252
	 * What's the maximum number of columns allowed in an index?
	 * 6.0 only allowed one column, but 6.1 introduced multi-column
	 * indices, so, theoretically, its all of them.
	 *
	 * @return max number of columns
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxColumnsInIndex() throws SQLException
	{
		return getMaxColumnsInTable();
	}

1253
	/*
1254 1255 1256 1257 1258 1259 1260 1261 1262 1263
	 * What's the maximum number of columns in an "ORDER BY clause?
	 *
	 * @return the max columns
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxColumnsInOrderBy() throws SQLException
	{
		return 0; // no limit
	}

1264
	/*
1265 1266 1267 1268 1269 1270 1271 1272 1273 1274
	 * What is the maximum number of columns in a "SELECT" list?
	 *
	 * @return the max columns
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxColumnsInSelect() throws SQLException
	{
		return 0; // no limit
	}

1275
	/*
1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291
	 * What is the maximum number of columns in a table? From the
	 * CREATE TABLE reference page...
	 *
	 * <p>"The new class is created as a heap with no initial data.  A
	 * class can have no more than 1600 attributes (realistically,
	 * this is limited by the fact that tuple sizes must be less than
	 * 8192 bytes)..."
	 *
	 * @return the max columns
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxColumnsInTable() throws SQLException
	{
		return 1600;
	}

1292
	/*
1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308
	 * How many active connection can we have at a time to this
	 * database?  Well, since it depends on postmaster, which just
	 * does a listen() followed by an accept() and fork(), its
	 * basically very high.  Unless the system runs out of processes,
	 * it can be 65535 (the number of aux. ports on a TCP/IP system).
	 * I will return 8192 since that is what even the largest system
	 * can realistically handle,
	 *
	 * @return the maximum number of connections
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxConnections() throws SQLException
	{
		return 8192;
	}

1309
	/*
1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320
	 * What is the maximum cursor name length (the same as all
	 * the other F***** identifiers!)
	 *
	 * @return max cursor name length in bytes
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxCursorNameLength() throws SQLException
	{
		return 32;
	}

1321
	/*
1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340
	 * Retrieves the maximum number of bytes for an index, including all
	 * of the parts of the index.
	 *
	 * @return max index length in bytes, which includes the composite
	 * of all the constituent parts of the index; a result of zero means
	 * that there is no limit or the limit is not known
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxIndexLength() throws SQLException
	{
		return 0; // no limit (larger than an int anyway)
	}

	public int getMaxSchemaNameLength() throws SQLException
	{
		// XXX-Not Implemented
		return 0;
	}

1341
	/*
1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359
	 * What is the maximum length of a procedure name?
	 * (length of pg_proc.proname used) - again, I really
	 * should do a query here to get it.
	 *
	 * @return the max name length in bytes
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxProcedureNameLength() throws SQLException
	{
		return 32;
	}

	public int getMaxCatalogNameLength() throws SQLException
	{
		// XXX-Not Implemented
		return 0;
	}

1360
	/*
1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373
	 * What is the maximum length of a single row?
	 *
	 * @return max row size in bytes
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxRowSize() throws SQLException
	{
		if (connection.haveMinimumServerVersion("7.1"))
			return 1073741824;	// 1 GB
		else
			return 8192;		// XXX could be altered
	}

1374
	/*
1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385
	 * Did getMaxRowSize() include LONGVARCHAR and LONGVARBINARY
	 * blobs?  We don't handle blobs yet
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean doesMaxRowSizeIncludeBlobs() throws SQLException
	{
		return false;
	}

1386
	/*
1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399
	 * What is the maximum length of a SQL statement?
	 *
	 * @return max length in bytes
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxStatementLength() throws SQLException
	{
		if (connection.haveMinimumServerVersion("7.0"))
			return 0;		// actually whatever fits in size_t
		else
			return 16384;
	}

1400
	/*
1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415
	 * How many active statements can we have open at one time to
	 * this database?  Basically, since each Statement downloads
	 * the results as the query is executed, we can have many.	However,
	 * we can only really have one statement per connection going
	 * at once (since they are executed serially) - so we return
	 * one.
	 *
	 * @return the maximum
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxStatements() throws SQLException
	{
		return 1;
	}

1416
	/*
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427
	 * What is the maximum length of a table name?	This was found
	 * from pg_class.relname length
	 *
	 * @return max name length in bytes
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxTableNameLength() throws SQLException
	{
		return 32;
	}

1428
	/*
1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439
	 * What is the maximum number of tables that can be specified
	 * in a SELECT?
	 *
	 * @return the maximum
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxTablesInSelect() throws SQLException
	{
		return 0; // no limit
	}

1440
	/*
1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454
	 * What is the maximum length of a user name?  Well, we generally
	 * use UNIX like user names in PostgreSQL, so I think this would
	 * be 8.  However, showing the schema for pg_user shows a length
	 * for username of 32.
	 *
	 * @return the max name length in bytes
	 * @exception SQLException if a database access error occurs
	 */
	public int getMaxUserNameLength() throws SQLException
	{
		return 32;
	}


1455
	/*
1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467
	 * What is the database's default transaction isolation level?  We
	 * do not support this, so all transactions are SERIALIZABLE.
	 *
	 * @return the default isolation level
	 * @exception SQLException if a database access error occurs
	 * @see Connection
	 */
	public int getDefaultTransactionIsolation() throws SQLException
	{
		return Connection.TRANSACTION_READ_COMMITTED;
	}

1468
	/*
1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
	 * Are transactions supported?	If not, commit and rollback are noops
	 * and the isolation level is TRANSACTION_NONE.  We do support
	 * transactions.
	 *
	 * @return true if transactions are supported
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsTransactions() throws SQLException
	{
		return true;
	}

1481
	/*
1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
	 * Does the database support the given transaction isolation level?
	 * We only support TRANSACTION_SERIALIZABLE and TRANSACTION_READ_COMMITTED
	 *
	 * @param level the values are defined in java.sql.Connection
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 * @see Connection
	 */
	public boolean supportsTransactionIsolationLevel(int level) throws SQLException
	{
		if (level == Connection.TRANSACTION_SERIALIZABLE ||
				level == Connection.TRANSACTION_READ_COMMITTED)
			return true;
		else
			return false;
	}

1499
	/*
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510
	 * Are both data definition and data manipulation transactions
	 * supported?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsDataDefinitionAndDataManipulationTransactions() throws SQLException
	{
		return true;
	}

1511
	/*
1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522
	 * Are only data manipulation statements withing a transaction
	 * supported?
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean supportsDataManipulationTransactionsOnly() throws SQLException
	{
		return false;
	}

1523
	/*
1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546
	 * Does a data definition statement within a transaction force
	 * the transaction to commit?  I think this means something like:
	 *
	 * <p><pre>
	 * CREATE TABLE T (A INT);
	 * INSERT INTO T (A) VALUES (2);
	 * BEGIN;
	 * UPDATE T SET A = A + 1;
	 * CREATE TABLE X (A INT);
	 * SELECT A FROM T INTO X;
	 * COMMIT;
	 * </pre><p>
	 *
	 * does the CREATE TABLE call cause a commit?  The answer is no.
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean dataDefinitionCausesTransactionCommit() throws SQLException
	{
		return false;
	}

1547
	/*
1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558
	 * Is a data definition statement within a transaction ignored?
	 * It seems to be (from experiment in previous method)
	 *
	 * @return true if so
	 * @exception SQLException if a database access error occurs
	 */
	public boolean dataDefinitionIgnoredInTransactions() throws SQLException
	{
		return true;
	}

1559
	/*
1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627
	 * Get a description of stored procedures available in a catalog
	 *
	 * <p>Only procedure descriptions matching the schema and procedure
	 * name criteria are returned.	They are ordered by PROCEDURE_SCHEM
	 * and PROCEDURE_NAME
	 *
	 * <p>Each procedure description has the following columns:
	 * <ol>
	 * <li><b>PROCEDURE_CAT</b> String => procedure catalog (may be null)
	 * <li><b>PROCEDURE_SCHEM</b> String => procedure schema (may be null)
	 * <li><b>PROCEDURE_NAME</b> String => procedure name
	 * <li><b>Field 4</b> reserved (make it null)
	 * <li><b>Field 5</b> reserved (make it null)
	 * <li><b>Field 6</b> reserved (make it null)
	 * <li><b>REMARKS</b> String => explanatory comment on the procedure
	 * <li><b>PROCEDURE_TYPE</b> short => kind of procedure
	 *	<ul>
	 *	  <li> procedureResultUnknown - May return a result
	 *	<li> procedureNoResult - Does not return a result
	 *	<li> procedureReturnsResult - Returns a result
	 *	  </ul>
	 * </ol>
	 *
	 * @param catalog - a catalog name; "" retrieves those without a
	 *	catalog; null means drop catalog name from criteria
	 * @param schemaParrern - a schema name pattern; "" retrieves those
	 *	without a schema - we ignore this parameter
	 * @param procedureNamePattern - a procedure name pattern
	 * @return ResultSet - each row is a procedure description
	 * @exception SQLException if a database access error occurs
	 */
	public java.sql.ResultSet getProcedures(String catalog, String schemaPattern, String procedureNamePattern) throws SQLException
	{
		// the field descriptors for the new ResultSet
		Field f[] = new Field[8];
		java.sql.ResultSet r;	// ResultSet for the SQL query that we need to do
		Vector v = new Vector();		// The new ResultSet tuple stuff

		f[0] = new Field(connection, "PROCEDURE_CAT", iVarcharOid, 32);
		f[1] = new Field(connection, "PROCEDURE_SCHEM", iVarcharOid, 32);
		f[2] = new Field(connection, "PROCEDURE_NAME", iVarcharOid, 32);
		f[3] = f[4] = f[5] = new Field(connection, "reserved", iVarcharOid, 32);	// null;	// reserved, must be null for now
		f[6] = new Field(connection, "REMARKS", iVarcharOid, 8192);
		f[7] = new Field(connection, "PROCEDURE_TYPE", iInt2Oid, 2);

		// If the pattern is null, then set it to the default
		if (procedureNamePattern == null)
			procedureNamePattern = "%";

		r = connection.ExecSQL("select proname, proretset from pg_proc where proname like '" + procedureNamePattern.toLowerCase() + "' order by proname");

		while (r.next())
		{
			byte[][] tuple = new byte[8][0];

			tuple[0] = null;			// Catalog name
			tuple[1] = null;			// Schema name
			tuple[2] = r.getBytes(1);		// Procedure name
			tuple[3] = tuple[4] = tuple[5] = null;	// Reserved
			tuple[6] = null;			// Remarks

			if (r.getBoolean(2))
				tuple[7] = Integer.toString(java.sql.DatabaseMetaData.procedureReturnsResult).getBytes();
			else
				tuple[7] = Integer.toString(java.sql.DatabaseMetaData.procedureNoResult).getBytes();

			v.addElement(tuple);
		}
1628
		return connection.getResultSet(null, f, v, "OK", 1);
1629 1630
	}

1631
	/*
1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705
	 * Get a description of a catalog's stored procedure parameters
	 * and result columns.
	 *
	 * <p>Only descriptions matching the schema, procedure and parameter
	 * name criteria are returned. They are ordered by PROCEDURE_SCHEM
	 * and PROCEDURE_NAME. Within this, the return value, if any, is
	 * first. Next are the parameter descriptions in call order. The
	 * column descriptions follow in column number order.
	 *
	 * <p>Each row in the ResultSet is a parameter description or column
	 * description with the following fields:
	 * <ol>
	 * <li><b>PROCEDURE_CAT</b> String => procedure catalog (may be null)
	 * <li><b>PROCEDURE_SCHE</b>M String => procedure schema (may be null)
	 * <li><b>PROCEDURE_NAME</b> String => procedure name
	 * <li><b>COLUMN_NAME</b> String => column/parameter name
	 * <li><b>COLUMN_TYPE</b> Short => kind of column/parameter:
	 * <ul><li>procedureColumnUnknown - nobody knows
	 * <li>procedureColumnIn - IN parameter
	 * <li>procedureColumnInOut - INOUT parameter
	 * <li>procedureColumnOut - OUT parameter
	 * <li>procedureColumnReturn - procedure return value
	 * <li>procedureColumnResult - result column in ResultSet
	 * </ul>
	 * <li><b>DATA_TYPE</b> short => SQL type from java.sql.Types
	 * <li><b>TYPE_NAME</b> String => SQL type name
	 * <li><b>PRECISION</b> int => precision
	 * <li><b>LENGTH</b> int => length in bytes of data
	 * <li><b>SCALE</b> short => scale
	 * <li><b>RADIX</b> short => radix
	 * <li><b>NULLABLE</b> short => can it contain NULL?
	 * <ul><li>procedureNoNulls - does not allow NULL values
	 * <li>procedureNullable - allows NULL values
	 * <li>procedureNullableUnknown - nullability unknown
	 * <li><b>REMARKS</b> String => comment describing parameter/column
	 * </ol>
	 * @param catalog This is ignored in org.postgresql, advise this is set to null
	 * @param schemaPattern This is ignored in org.postgresql, advise this is set to null
	 * @param procedureNamePattern a procedure name pattern
	 * @param columnNamePattern a column name pattern
	 * @return each row is a stored procedure parameter or column description
	 * @exception SQLException if a database-access error occurs
	 * @see #getSearchStringEscape
	 */
	// Implementation note: This is required for Borland's JBuilder to work
	public java.sql.ResultSet getProcedureColumns(String catalog, String schemaPattern, String procedureNamePattern, String columnNamePattern) throws SQLException
	{
		if (procedureNamePattern == null)
			procedureNamePattern = "%";

		if (columnNamePattern == null)
			columnNamePattern = "%";

		// for now, this returns an empty result set.
		Field f[] = new Field[13];
		ResultSet r;	// ResultSet for the SQL query that we need to do
		Vector v = new Vector();		// The new ResultSet tuple stuff

		f[0] = new Field(connection, "PROCEDURE_CAT", iVarcharOid, 32);
		f[1] = new Field(connection, "PROCEDURE_SCHEM", iVarcharOid, 32);
		f[2] = new Field(connection, "PROCEDURE_NAME", iVarcharOid, 32);
		f[3] = new Field(connection, "COLUMN_NAME", iVarcharOid, 32);
		f[4] = new Field(connection, "COLUMN_TYPE", iInt2Oid, 2);
		f[5] = new Field(connection, "DATA_TYPE", iInt2Oid, 2);
		f[6] = new Field(connection, "TYPE_NAME", iVarcharOid, 32);
		f[7] = new Field(connection, "PRECISION", iInt4Oid, 4);
		f[8] = new Field(connection, "LENGTH", iInt4Oid, 4);
		f[9] = new Field(connection, "SCALE", iInt2Oid, 2);
		f[10] = new Field(connection, "RADIX", iInt2Oid, 2);
		f[11] = new Field(connection, "NULLABLE", iInt2Oid, 2);
		f[12] = new Field(connection, "REMARKS", iVarcharOid, 32);

		// add query loop here

1706
		return connection.getResultSet(null, f, v, "OK", 1);
1707 1708
	}

1709
	/*
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799
	 * Get a description of tables available in a catalog.
	 *
	 * <p>Only table descriptions matching the catalog, schema, table
	 * name and type criteria are returned. They are ordered by
	 * TABLE_TYPE, TABLE_SCHEM and TABLE_NAME.
	 *
	 * <p>Each table description has the following columns:
	 *
	 * <ol>
	 * <li><b>TABLE_CAT</b> String => table catalog (may be null)
	 * <li><b>TABLE_SCHEM</b> String => table schema (may be null)
	 * <li><b>TABLE_NAME</b> String => table name
	 * <li><b>TABLE_TYPE</b> String => table type. Typical types are "TABLE",
	 * "VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY", "LOCAL
	 * TEMPORARY", "ALIAS", "SYNONYM".
	 * <li><b>REMARKS</b> String => explanatory comment on the table
	 * </ol>
	 *
	 * <p>The valid values for the types parameter are:
	 * "TABLE", "INDEX", "SEQUENCE", "SYSTEM TABLE" and "SYSTEM INDEX"
	 *
	 * @param catalog a catalog name; For org.postgresql, this is ignored, and
	 * should be set to null
	 * @param schemaPattern a schema name pattern; For org.postgresql, this is ignored, and
	 * should be set to null
	 * @param tableNamePattern a table name pattern. For all tables this should be "%"
	 * @param types a list of table types to include; null returns
	 * all types
	 * @return each row is a table description
	 * @exception SQLException if a database-access error occurs.
	 */
	public java.sql.ResultSet getTables(String catalog, String schemaPattern, String tableNamePattern, String types[]) throws SQLException
	{
		// Handle default value for types
		if (types == null)
			types = defaultTableTypes;

		if (tableNamePattern == null)
			tableNamePattern = "%";

		// the field descriptors for the new ResultSet
		Field f[] = new Field[5];
		java.sql.ResultSet r;	// ResultSet for the SQL query that we need to do
		Vector v = new Vector();		// The new ResultSet tuple stuff

		f[0] = new Field(connection, "TABLE_CAT", iVarcharOid, 32);
		f[1] = new Field(connection, "TABLE_SCHEM", iVarcharOid, 32);
		f[2] = new Field(connection, "TABLE_NAME", iVarcharOid, 32);
		f[3] = new Field(connection, "TABLE_TYPE", iVarcharOid, 32);
		f[4] = new Field(connection, "REMARKS", iVarcharOid, 32);

		// Now form the query
		StringBuffer sql = new StringBuffer("select relname,oid,relkind from pg_class where (");

		boolean notFirst = false;
		for (int i = 0;i < types.length;i++)
		{
			for (int j = 0;j < getTableTypes.length;j++)
				if (getTableTypes[j][0].equals(types[i]))
				{
					if (notFirst)
						sql.append(" or ");
					sql.append(getTableTypes[j][1]);
					notFirst = true;
				}
		}

		// Added by Stefan Andreasen <stefan@linux.kapow.dk>
		// Now take the pattern into account
		sql.append(") and relname like '");
		sql.append(tableNamePattern.toLowerCase());
		sql.append("' order by relkind, relname");

		// Now run the query
		r = connection.ExecSQL(sql.toString());

		while (r.next())
		{
			byte[][] tuple = new byte[5][0];

			// Fetch the description for the table (if any)
			String getDescriptionStatement =
				connection.haveMinimumServerVersion("7.2") ?
				"select obj_description(" + r.getInt(2) + ",'pg_class')" :
				"select description from pg_description where objoid=" + r.getInt(2);

			java.sql.ResultSet dr = connection.ExecSQL(getDescriptionStatement);

			byte remarks[] = null;

1800
			if (((AbstractJdbc1ResultSet)dr).getTupleCount() == 1)
1801 1802 1803 1804 1805 1806 1807 1808 1809
			{
				dr.next();
				remarks = dr.getBytes(1);
			}
			dr.close();

			String relKind;
			switch (r.getBytes(3)[0])
			{
1810
				case (byte) 'r':
1811 1812 1813 1814 1815 1816 1817 1818 1819
					if ( r.getString(1).startsWith("pg_") )
                                        {
                                                relKind = "SYSTEM TABLE";
                                        }
                                        else
                                        {
                                                relKind = "TABLE";
                                        }
 					break;
1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830
				case (byte) 'i':
					relKind = "INDEX";
					break;
				case (byte) 'S':
					relKind = "SEQUENCE";
					break;
				case (byte) 'v':
					relKind = "VIEW";
					break;
				default:
					relKind = null;
1831 1832 1833 1834 1835 1836 1837 1838 1839 1840
			}

			tuple[0] = null;		// Catalog name
			tuple[1] = null;		// Schema name
			tuple[2] = r.getBytes(1);	// Table name
			tuple[3] = (relKind == null) ? null : relKind.getBytes();	// Table type
			tuple[4] = remarks;		// Remarks
			v.addElement(tuple);
		}
		r.close();
1841
		return connection.getResultSet(null, f, v, "OK", 1);
1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865
	}

	// This array contains the valid values for the types argument
	// in getTables().
	//
	// Each supported type consists of it's name, and the sql where
	// clause to retrieve that value.
	//
	// IMPORTANT: the query must be enclosed in ( )
	private static final String getTableTypes[][] = {
				{"TABLE", "(relkind='r' and relhasrules='f' and relname !~ '^pg_' and relname !~ '^xinv')"},
				{"VIEW", "(relkind='v' and relname !~ '^pg_')"},
				{"INDEX", "(relkind='i' and relname !~ '^pg_')"},
				{"SEQUENCE", "(relkind='S' and relname !~ '^pg_')"},
				{"SYSTEM TABLE", "(relkind='r' and relname ~ '^pg_')"},
				{"SYSTEM INDEX", "(relkind='i' and relname ~ '^pg_')"}
			};

	// These are the default tables, used when NULL is passed to getTables
	// The choice of these provide the same behaviour as psql's \d
	private static final String defaultTableTypes[] = {
				"TABLE", "VIEW", "INDEX", "SEQUENCE"
			};

1866
	/*
1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887
	 * Get the schema names available in this database.  The results
	 * are ordered by schema name.
	 *
	 * <P>The schema column is:
	 *	<OL>
	 *	<LI><B>TABLE_SCHEM</B> String => schema name
	 *	</OL>
	 *
	 * @return ResultSet each row has a single String column that is a
	 * schema name
	 */
	public java.sql.ResultSet getSchemas() throws SQLException
	{
		// We don't use schemas, so we simply return a single schema name "".
		//
		Field f[] = new Field[1];
		Vector v = new Vector();
		byte[][] tuple = new byte[1][0];
		f[0] = new Field(connection, "TABLE_SCHEM", iVarcharOid, 32);
		tuple[0] = "".getBytes();
		v.addElement(tuple);
1888
		return connection.getResultSet(null, f, v, "OK", 1);
1889 1890
	}

1891
	/*
1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907
	 * Get the catalog names available in this database.  The results
	 * are ordered by catalog name.
	 *
	 * <P>The catalog column is:
	 *	<OL>
	 *	<LI><B>TABLE_CAT</B> String => catalog name
	 *	</OL>
	 *
	 * @return ResultSet each row has a single String column that is a
	 * catalog name
	 */
	public java.sql.ResultSet getCatalogs() throws SQLException
	{
		return connection.createStatement().executeQuery("select datname as TABLE_CAT from pg_database;");
	}

1908
	/*
1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932
	 * Get the table types available in this database.	The results
	 * are ordered by table type.
	 *
	 * <P>The table type is:
	 *	<OL>
	 *	<LI><B>TABLE_TYPE</B> String => table type.  Typical types are "TABLE",
	 *			"VIEW", "SYSTEM TABLE", "GLOBAL TEMPORARY",
	 *			"LOCAL TEMPORARY", "ALIAS", "SYNONYM".
	 *	</OL>
	 *
	 * @return ResultSet each row has a single String column that is a
	 * table type
	 */
	public java.sql.ResultSet getTableTypes() throws SQLException
	{
		Field f[] = new Field[1];
		Vector v = new Vector();
		f[0] = new Field(connection, new String("TABLE_TYPE"), iVarcharOid, 32);
		for (int i = 0;i < getTableTypes.length;i++)
		{
			byte[][] tuple = new byte[1][0];
			tuple[0] = getTableTypes[i][0].getBytes();
			v.addElement(tuple);
		}
1933
		return connection.getResultSet(null, f, v, "OK", 1);
1934 1935
	}

1936
	/*
1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031
	 * Get a description of table columns available in a catalog.
	 *
	 * <P>Only column descriptions matching the catalog, schema, table
	 * and column name criteria are returned.  They are ordered by
	 * TABLE_SCHEM, TABLE_NAME and ORDINAL_POSITION.
	 *
	 * <P>Each column description has the following columns:
	 *	<OL>
	 *	<LI><B>TABLE_CAT</B> String => table catalog (may be null)
	 *	<LI><B>TABLE_SCHEM</B> String => table schema (may be null)
	 *	<LI><B>TABLE_NAME</B> String => table name
	 *	<LI><B>COLUMN_NAME</B> String => column name
	 *	<LI><B>DATA_TYPE</B> short => SQL type from java.sql.Types
	 *	<LI><B>TYPE_NAME</B> String => Data source dependent type name
	 *	<LI><B>COLUMN_SIZE</B> int => column size.	For char or date
	 *		types this is the maximum number of characters, for numeric or
	 *		decimal types this is precision.
	 *	<LI><B>BUFFER_LENGTH</B> is not used.
	 *	<LI><B>DECIMAL_DIGITS</B> int => the number of fractional digits
	 *	<LI><B>NUM_PREC_RADIX</B> int => Radix (typically either 10 or 2)
	 *	<LI><B>NULLABLE</B> int => is NULL allowed?
	 *		<UL>
	 *		<LI> columnNoNulls - might not allow NULL values
	 *		<LI> columnNullable - definitely allows NULL values
	 *		<LI> columnNullableUnknown - nullability unknown
	 *		</UL>
	 *	<LI><B>REMARKS</B> String => comment describing column (may be null)
	 *	<LI><B>COLUMN_DEF</B> String => default value (may be null)
	 *	<LI><B>SQL_DATA_TYPE</B> int => unused
	 *	<LI><B>SQL_DATETIME_SUB</B> int => unused
	 *	<LI><B>CHAR_OCTET_LENGTH</B> int => for char types the
	 *		 maximum number of bytes in the column
	 *	<LI><B>ORDINAL_POSITION</B> int => index of column in table
	 *		(starting at 1)
	 *	<LI><B>IS_NULLABLE</B> String => "NO" means column definitely
	 *		does not allow NULL values; "YES" means the column might
	 *		allow NULL values.	An empty string means nobody knows.
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schemaPattern a schema name pattern; "" retrieves those
	 * without a schema
	 * @param tableNamePattern a table name pattern
	 * @param columnNamePattern a column name pattern
	 * @return ResultSet each row is a column description
	 * @see #getSearchStringEscape
	 */
	public java.sql.ResultSet getColumns(String catalog, String schemaPattern, String tableNamePattern, String columnNamePattern) throws SQLException
	{
		Vector v = new Vector();		// The new ResultSet tuple stuff
		Field f[] = new Field[18];		// The field descriptors for the new ResultSet

		f[0] = new Field(connection, "TABLE_CAT", iVarcharOid, 32);
		f[1] = new Field(connection, "TABLE_SCHEM", iVarcharOid, 32);
		f[2] = new Field(connection, "TABLE_NAME", iVarcharOid, 32);
		f[3] = new Field(connection, "COLUMN_NAME", iVarcharOid, 32);
		f[4] = new Field(connection, "DATA_TYPE", iInt2Oid, 2);
		f[5] = new Field(connection, "TYPE_NAME", iVarcharOid, 32);
		f[6] = new Field(connection, "COLUMN_SIZE", iInt4Oid, 4);
		f[7] = new Field(connection, "BUFFER_LENGTH", iVarcharOid, 32);
		f[8] = new Field(connection, "DECIMAL_DIGITS", iInt4Oid, 4);
		f[9] = new Field(connection, "NUM_PREC_RADIX", iInt4Oid, 4);
		f[10] = new Field(connection, "NULLABLE", iInt4Oid, 4);
		f[11] = new Field(connection, "REMARKS", iVarcharOid, 32);
		f[12] = new Field(connection, "COLUMN_DEF", iVarcharOid, 32);
		f[13] = new Field(connection, "SQL_DATA_TYPE", iInt4Oid, 4);
		f[14] = new Field(connection, "SQL_DATETIME_SUB", iInt4Oid, 4);
		f[15] = new Field(connection, "CHAR_OCTET_LENGTH", iVarcharOid, 32);
		f[16] = new Field(connection, "ORDINAL_POSITION", iInt4Oid, 4);
		f[17] = new Field(connection, "IS_NULLABLE", iVarcharOid, 32);

		StringBuffer sql = new StringBuffer(512);

		/* Build a >= 7.1 SQL statement to list all columns */
		sql.append("select " +
				   (connection.haveMinimumServerVersion("7.2") ? "a.attrelid, " : "a.oid, ") +
				   "    c.relname, " +
				   "    a.attname, " +
				   "    a.atttypid, " +
				   "    a.attnum, " +
				   "    a.attnotnull, " +
				   "    a.attlen, " +
				   "    a.atttypmod, " +
				   "    d.adsrc, " +
				   "    t.typname, " +
				   /* Use the new col_description in 7.2 or an additional outer join in 7.1 */
				   (connection.haveMinimumServerVersion("7.2") ? "col_description(a.attrelid, a.attnum) " : "e.description ") +
				   "from" +
				   "    (" +
				   "        (pg_class c inner join pg_attribute a on" +
				   "            (" +
				   "                a.attrelid=c.oid");

		if ((tableNamePattern != null) && ! tableNamePattern.equals("%"))
		{
2032
			sql.append("                and c.relname like \'" + tableNamePattern.toLowerCase() + "\'");
2033 2034 2035 2036
		}

		if ((columnNamePattern != null) && ! columnNamePattern.equals("%"))
		{
2037
			sql.append("                and a.attname like \'" + columnNamePattern.toLowerCase() + "\'");
2038 2039
		}

2040
		sql.append(
2041 2042 2043 2044 2045 2046 2047 2048
			"                and a.attnum > 0" +
			"            )" +
			"        ) inner join pg_type t on" +
			"            (" +
			"                t.oid = a.atttypid" +
			"            )" +
			"    )" +
			"    left outer join pg_attrdef d on" +
2049
			"        (" +
2050 2051
			"            c.oid = d.adrelid" +
			"            and a.attnum = d.adnum" +
2052
			"        ) ");
2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096

		if (!connection.haveMinimumServerVersion("7.2"))
		{
			/* Only for 7.1 */
			sql.append(
				"    left outer join pg_description e on" +
				"        (" +
				"            e.objoid = a.oid" +
				"        ) ");
		}

		sql.append("order by" +
				   "    c.relname, a.attnum");

		java.sql.ResultSet r = connection.ExecSQL(sql.toString());
		while (r.next())
		{
			byte[][] tuple = new byte[18][0];

			String nullFlag = r.getString(6);
			String typname = r.getString(10);

			tuple[0] = null;						// Catalog name, not supported
			tuple[1] = null;						// Schema name, not supported
			tuple[2] = r.getBytes(2);				// Table name
			tuple[3] = r.getBytes(3);				// Column name
			tuple[4] = Integer.toString(connection.getSQLType(typname)).getBytes(); // Data type
			tuple[5] = typname.getBytes();			// Type name

			// Column size
			// Looking at the psql source,
			// I think the length of a varchar as specified when the table was created
			// should be extracted from atttypmod which contains this length + sizeof(int32)
			if (typname.equals("bpchar") || typname.equals("varchar"))
			{
				int atttypmod = r.getInt(8);
				tuple[6] = Integer.toString(atttypmod != -1 ? atttypmod - VARHDRSZ : 0).getBytes();
			}
			else
			{
				tuple[6] = r.getBytes(7);
			}

			tuple[7] = null;						// Buffer length
2097
			// Decimal digits = scale
2098
			// From the source (see e.g. backend/utils/adt/format_type.c,
2099 2100
			// function numeric()) the scale and precision can be calculated
			// from the typmod value.
2101 2102
			if (typname.equals("numeric") || typname.equals("decimal"))
			{
2103
				int attypmod = r.getInt(8) -  VARHDRSZ;
2104
				tuple[8] =
2105 2106 2107
					Integer.toString(attypmod & 0xffff).getBytes();
				tuple[9] =
					Integer.toString( ( attypmod >> 16 ) & 0xffff ).getBytes();
2108 2109
			}
			else
2110
			{
2111
				tuple[8] = "0".getBytes();
2112 2113
				tuple[9] = "10".getBytes();				// Num Prec Radix - assume decimal
			}
2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128
			tuple[10] = Integer.toString(nullFlag.equals("f") ?
										 java.sql.DatabaseMetaData.columnNullable :
										 java.sql.DatabaseMetaData.columnNoNulls).getBytes();	// Nullable
			tuple[11] = r.getBytes(11);				// Description (if any)
			tuple[12] = r.getBytes(9);				// Column default
			tuple[13] = null;						// sql data type (unused)
			tuple[14] = null;						// sql datetime sub (unused)
			tuple[15] = tuple[6];					// char octet length
			tuple[16] = r.getBytes(5);				// ordinal position
			tuple[17] = (nullFlag.equals("f") ? "YES" : "NO").getBytes();	// Is nullable

			v.addElement(tuple);
		}
		r.close();

2129
		return connection.getResultSet(null, f, v, "OK", 1);
2130
	}
2131

2132
	/*
2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186
	 * Get a description of the access rights for a table's columns.
	 *
	 * <P>Only privileges matching the column name criteria are
	 * returned.  They are ordered by COLUMN_NAME and PRIVILEGE.
	 *
	 * <P>Each privilige description has the following columns:
	 *	<OL>
	 *	<LI><B>TABLE_CAT</B> String => table catalog (may be null)
	 *	<LI><B>TABLE_SCHEM</B> String => table schema (may be null)
	 *	<LI><B>TABLE_NAME</B> String => table name
	 *	<LI><B>COLUMN_NAME</B> String => column name
	 *	<LI><B>GRANTOR</B> => grantor of access (may be null)
	 *	<LI><B>GRANTEE</B> String => grantee of access
	 *	<LI><B>PRIVILEGE</B> String => name of access (SELECT,
	 *		INSERT, UPDATE, REFRENCES, ...)
	 *	<LI><B>IS_GRANTABLE</B> String => "YES" if grantee is permitted
	 *		to grant to others; "NO" if not; null if unknown
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schema a schema name; "" retrieves those without a schema
	 * @param table a table name
	 * @param columnNamePattern a column name pattern
	 * @return ResultSet each row is a column privilege description
	 * @see #getSearchStringEscape
	 */
	public java.sql.ResultSet getColumnPrivileges(String catalog, String schema, String table, String columnNamePattern) throws SQLException
	{
		Field f[] = new Field[8];
		Vector v = new Vector();

		if (table == null)
			table = "%";

		if (columnNamePattern == null)
			columnNamePattern = "%";
		else
			columnNamePattern = columnNamePattern.toLowerCase();

		f[0] = new Field(connection, "TABLE_CAT", iVarcharOid, 32);
		f[1] = new Field(connection, "TABLE_SCHEM", iVarcharOid, 32);
		f[2] = new Field(connection, "TABLE_NAME", iVarcharOid, 32);
		f[3] = new Field(connection, "COLUMN_NAME", iVarcharOid, 32);
		f[4] = new Field(connection, "GRANTOR", iVarcharOid, 32);
		f[5] = new Field(connection, "GRANTEE", iVarcharOid, 32);
		f[6] = new Field(connection, "PRIVILEGE", iVarcharOid, 32);
		f[7] = new Field(connection, "IS_GRANTABLE", iVarcharOid, 32);

		// This is taken direct from the psql source
		java.sql.ResultSet r = connection.ExecSQL("SELECT relname, relacl FROM pg_class, pg_user WHERE ( relkind = 'r' OR relkind = 'i') and relname !~ '^pg_' and relname !~ '^xin[vx][0-9]+' and usesysid = relowner and relname like '" + table.toLowerCase() + "' ORDER BY relname");
		while (r.next())
		{
			byte[][] tuple = new byte[8][0];
			tuple[0] = tuple[1] = "".getBytes();
2187
                        if (Driver.logDebug) Driver.debug("relname=\"" + r.getString(1) + "\" relacl=\"" + r.getString(2) + "\"");
2188 2189 2190

			// For now, don't add to the result as relacl needs to be processed.
			//v.addElement(tuple);
2191 2192
		}

2193
		return connection.getResultSet(null, f, v, "OK", 1);
2194
	}
2195

2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257
        /*
        * Get a description of the access rights for each table available
        * in a catalog.
        *
        * This method is currently unimplemented.
        *
        * <P>Only privileges matching the schema and table name
        * criteria are returned.  They are ordered by TABLE_SCHEM,
        * TABLE_NAME, and PRIVILEGE.
        *
        * <P>Each privilige description has the following columns:
        *	<OL>
        *	<LI><B>TABLE_CAT</B> String => table catalog (may be null)
        *	<LI><B>TABLE_SCHEM</B> String => table schema (may be null)
        *	<LI><B>TABLE_NAME</B> String => table name
        *	<LI><B>COLUMN_NAME</B> String => column name
        *	<LI><B>GRANTOR</B> => grantor of access (may be null)
        *	<LI><B>GRANTEE</B> String => grantee of access
        *	<LI><B>PRIVILEGE</B> String => name of access (SELECT,
        *		INSERT, UPDATE, REFRENCES, ...)
        *	<LI><B>IS_GRANTABLE</B> String => "YES" if grantee is permitted
        *		to grant to others; "NO" if not; null if unknown
        *	</OL>
        *
        * @param catalog a catalog name; "" retrieves those without a catalog
        * @param schemaPattern a schema name pattern; "" retrieves those
        * without a schema
        * @param tableNamePattern a table name pattern
        * @return ResultSet each row is a table privilege description
        * @see #getSearchStringEscape
        */
        public java.sql.ResultSet getTablePrivileges(String catalog, String schemaPattern, String tableNamePattern) throws SQLException
        {
          Field f[] = new Field[8];
          Vector v = new Vector();

          if (tableNamePattern == null)
            tableNamePattern = "%";

          f[0] = new Field(connection, "TABLE_CAT", iVarcharOid, 32);
          f[1] = new Field(connection, "TABLE_SCHEM", iVarcharOid, 32);
          f[2] = new Field(connection, "TABLE_NAME", iVarcharOid, 32);
          f[3] = new Field(connection, "COLUMN_NAME", iVarcharOid, 32);
          f[4] = new Field(connection, "GRANTOR", iVarcharOid, 32);
          f[5] = new Field(connection, "GRANTEE", iVarcharOid, 32);
          f[6] = new Field(connection, "PRIVILEGE", iVarcharOid, 32);
          f[7] = new Field(connection, "IS_GRANTABLE", iVarcharOid, 32);

          // This is taken direct from the psql source
          java.sql.ResultSet r = connection.ExecSQL("SELECT relname, relacl FROM pg_class, pg_user WHERE ( relkind = 'r' OR relkind = 'i') and relname !~ '^pg_' and relname !~ '^xin[vx][0-9]+' and usesysid = relowner and relname like '" + tableNamePattern.toLowerCase() + "' ORDER BY relname");
          while (r.next())
          {
            byte[][] tuple = new byte[8][0];
            tuple[0] = tuple[1] = "".getBytes();
            if (Driver.logDebug) Driver.debug("relname=\"" + r.getString(1) + "\" relacl=\"" + r.getString(2) + "\"");

            // For now, don't add to the result as relacl needs to be processed.
            //v.addElement(tuple);
          }

          return connection.getResultSet(null, f, v, "OK", 1);
        }
2258

2259
	/*
2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309
	 * Get a description of a table's optimal set of columns that
	 * uniquely identifies a row. They are ordered by SCOPE.
	 *
	 * <P>Each column description has the following columns:
	 *	<OL>
	 *	<LI><B>SCOPE</B> short => actual scope of result
	 *		<UL>
	 *		<LI> bestRowTemporary - very temporary, while using row
	 *		<LI> bestRowTransaction - valid for remainder of current transaction
	 *		<LI> bestRowSession - valid for remainder of current session
	 *		</UL>
	 *	<LI><B>COLUMN_NAME</B> String => column name
	 *	<LI><B>DATA_TYPE</B> short => SQL data type from java.sql.Types
	 *	<LI><B>TYPE_NAME</B> String => Data source dependent type name
	 *	<LI><B>COLUMN_SIZE</B> int => precision
	 *	<LI><B>BUFFER_LENGTH</B> int => not used
	 *	<LI><B>DECIMAL_DIGITS</B> short  => scale
	 *	<LI><B>PSEUDO_COLUMN</B> short => is this a pseudo column
	 *		like an Oracle ROWID
	 *		<UL>
	 *		<LI> bestRowUnknown - may or may not be pseudo column
	 *		<LI> bestRowNotPseudo - is NOT a pseudo column
	 *		<LI> bestRowPseudo - is a pseudo column
	 *		</UL>
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schema a schema name; "" retrieves those without a schema
	 * @param table a table name
	 * @param scope the scope of interest; use same values as SCOPE
	 * @param nullable include columns that are nullable?
	 * @return ResultSet each row is a column description
	 */
	// Implementation note: This is required for Borland's JBuilder to work
	public java.sql.ResultSet getBestRowIdentifier(String catalog, String schema, String table, int scope, boolean nullable) throws SQLException
	{
		// for now, this returns an empty result set.
		Field f[] = new Field[8];
		ResultSet r;	// ResultSet for the SQL query that we need to do
		Vector v = new Vector();		// The new ResultSet tuple stuff

		f[0] = new Field(connection, "SCOPE", iInt2Oid, 2);
		f[1] = new Field(connection, "COLUMN_NAME", iVarcharOid, 32);
		f[2] = new Field(connection, "DATA_TYPE", iInt2Oid, 2);
		f[3] = new Field(connection, "TYPE_NAME", iVarcharOid, 32);
		f[4] = new Field(connection, "COLUMN_SIZE", iInt4Oid, 4);
		f[5] = new Field(connection, "BUFFER_LENGTH", iInt4Oid, 4);
		f[6] = new Field(connection, "DECIMAL_DIGITS", iInt2Oid, 2);
		f[7] = new Field(connection, "PSEUDO_COLUMN", iInt2Oid, 2);

2310
		return connection.getResultSet(null, f, v, "OK", 1);
2311 2312
	}

2313
	/*
2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347
	 * Get a description of a table's columns that are automatically
	 * updated when any value in a row is updated.	They are
	 * unordered.
	 *
	 * This method is currently unimplemented.
	 *
	 * <P>Each column description has the following columns:
	 *	<OL>
	 *	<LI><B>SCOPE</B> short => is not used
	 *	<LI><B>COLUMN_NAME</B> String => column name
	 *	<LI><B>DATA_TYPE</B> short => SQL data type from java.sql.Types
	 *	<LI><B>TYPE_NAME</B> String => Data source dependent type name
	 *	<LI><B>COLUMN_SIZE</B> int => precision
	 *	<LI><B>BUFFER_LENGTH</B> int => length of column value in bytes
	 *	<LI><B>DECIMAL_DIGITS</B> short  => scale
	 *	<LI><B>PSEUDO_COLUMN</B> short => is this a pseudo column
	 *		like an Oracle ROWID
	 *		<UL>
	 *		<LI> versionColumnUnknown - may or may not be pseudo column
	 *		<LI> versionColumnNotPseudo - is NOT a pseudo column
	 *		<LI> versionColumnPseudo - is a pseudo column
	 *		</UL>
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schema a schema name; "" retrieves those without a schema
	 * @param table a table name
	 * @return ResultSet each row is a column description
	 */
	public java.sql.ResultSet getVersionColumns(String catalog, String schema, String table) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

2348
	/*
2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377
	 * Get a description of a table's primary key columns.  They
	 * are ordered by COLUMN_NAME.
	 *
	 * <P>Each column description has the following columns:
	 *	<OL>
	 *	<LI><B>TABLE_CAT</B> String => table catalog (may be null)
	 *	<LI><B>TABLE_SCHEM</B> String => table schema (may be null)
	 *	<LI><B>TABLE_NAME</B> String => table name
	 *	<LI><B>COLUMN_NAME</B> String => column name
	 *	<LI><B>KEY_SEQ</B> short => sequence number within primary key
	 *	<LI><B>PK_NAME</B> String => primary key name (may be null)
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schema a schema name pattern; "" retrieves those
	 * without a schema
	 * @param table a table name
	 * @return ResultSet each row is a primary key column description
	 */
	public java.sql.ResultSet getPrimaryKeys(String catalog, String schema, String table) throws SQLException
	{
		return connection.createStatement().executeQuery("SELECT " +
				"'' as TABLE_CAT," +
				"'' AS TABLE_SCHEM," +
				"bc.relname AS TABLE_NAME," +
				"a.attname AS COLUMN_NAME," +
				"a.attnum as KEY_SEQ," +
				"ic.relname as PK_NAME " +
				" FROM pg_class bc, pg_class ic, pg_index i, pg_attribute a" +
2378
				" WHERE bc.relkind = 'r' " +   //	-- not indices
2379 2380 2381 2382 2383 2384 2385 2386 2387
				"  and upper(bc.relname) = upper('" + table + "')" +
				"  and i.indrelid = bc.oid" +
				"  and i.indexrelid = ic.oid" +
				"  and ic.oid = a.attrelid" +
				"  and i.indisprimary='t' " +
				" ORDER BY table_name, pk_name, key_seq"
														);
	}

2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596
/*
 SELECT
        c.relname as primary,
        c2.relname as foreign,
        t.tgconstrname,
        ic.relname as fkeyname,
        af.attnum as fkeyseq,
        ipc.relname as pkeyname,
        ap.attnum as pkeyseq,
        t.tgdeferrable,
        t.tginitdeferred,
        t.tgnargs,t.tgargs,
        p1.proname as updaterule,
        p2.proname as deleterule
FROM
        pg_trigger t,
        pg_trigger t1,
        pg_class c,
        pg_class c2,
        pg_class ic,
        pg_class ipc,
        pg_proc p1,
        pg_proc p2,
        pg_index if,
        pg_index ip,
        pg_attribute af,
        pg_attribute ap
WHERE
        (t.tgrelid=c.oid
        AND t.tgisconstraint
        AND t.tgconstrrelid=c2.oid
        AND t.tgfoid=p1.oid
        and p1.proname like '%%upd')

        and
        (t1.tgrelid=c.oid
        and t1.tgisconstraint
        and t1.tgconstrrelid=c2.oid
        AND t1.tgfoid=p2.oid
        and p2.proname like '%%del')

        AND c2.relname='users'

        AND
        (if.indrelid=c.oid
        AND if.indexrelid=ic.oid
        and ic.oid=af.attrelid
        AND if.indisprimary)

        and
        (ip.indrelid=c2.oid
        and ip.indexrelid=ipc.oid
        and ipc.oid=ap.attrelid
        and ip.indisprimary)

*/
/**
 *
 * @param catalog
 * @param schema
 * @param primaryTable if provided will get the keys exported by this table
 * @param foreignTable if provided will get the keys imported by this table
 * @return ResultSet
 * @throws SQLException
 */

        protected java.sql.ResultSet getImportedExportedKeys(String catalog, String schema, String primaryTable, String foreignTable) throws SQLException
        {
                Field f[] = new Field[14];

                f[0] = new Field(connection, "PKTABLE_CAT", iVarcharOid, 32);
                f[1] = new Field(connection, "PKTABLE_SCHEM", iVarcharOid, 32);
                f[2] = new Field(connection, "PKTABLE_NAME", iVarcharOid, 32);
                f[3] = new Field(connection, "PKCOLUMN_NAME", iVarcharOid, 32);
                f[4] = new Field(connection, "FKTABLE_CAT", iVarcharOid, 32);
                f[5] = new Field(connection, "FKTABLE_SCHEM", iVarcharOid, 32);
                f[6] = new Field(connection, "FKTABLE_NAME", iVarcharOid, 32);
                f[7] = new Field(connection, "FKCOLUMN_NAME", iVarcharOid, 32);
                f[8] = new Field(connection, "KEY_SEQ", iInt2Oid, 2);
                f[9] = new Field(connection, "UPDATE_RULE", iInt2Oid, 2);
                f[10] = new Field(connection, "DELETE_RULE", iInt2Oid, 2);
                f[11] = new Field(connection, "FK_NAME", iVarcharOid, 32);
                f[12] = new Field(connection, "PK_NAME", iVarcharOid, 32);
                f[13] = new Field(connection, "DEFERRABILITY", iInt2Oid, 2);

                java.sql.ResultSet rs = connection.ExecSQL(
                "SELECT distinct "
                  + "c.relname as prelname, "
                  + "c2.relname as frelname, "
                  + "t.tgconstrname, "
                  + "a.attnum as keyseq, "
                  + "ic.relname as fkeyname, "
                  + "t.tgdeferrable, "
                  + "t.tginitdeferred, "
                  + "t.tgnargs,t.tgargs, "
                  + "p1.proname as updaterule, "
                  + "p2.proname as deleterule "
          + "FROM "
                  + "pg_trigger t, "
                  + "pg_trigger t1, "
                  + "pg_class c, "
                  + "pg_class c2, "
                  + "pg_class ic, "
                  + "pg_proc p1, "
                  + "pg_proc p2, "
                  + "pg_index i, "
                  + "pg_attribute a "
          + "WHERE "
                   // isolate the update rule
                  + "(t.tgrelid=c.oid "
                  + "AND t.tgisconstraint "
                  + "AND t.tgconstrrelid=c2.oid "
                  + "AND t.tgfoid=p1.oid "
                  + "and p1.proname like '%%upd') "

                  + "and "
                  // isolate the delete rule
                  + "(t1.tgrelid=c.oid "
                  + "and t1.tgisconstraint "
                  + "and t1.tgconstrrelid=c2.oid "
                  + "AND t1.tgfoid=p2.oid "
                  + "and p2.proname like '%%del') "

                  // if we are looking for exported keys then primary table will be used
                                                                  + ((primaryTable != null) ? "AND c.relname='" + primaryTable + "' " : "")

                  // if we are looking for imported keys then the foreign table will be used
                                                                  + ((foreignTable != null) ? "AND c2.relname='" + foreignTable + "' " : "")
                  + "AND i.indrelid=c.oid "
                  + "AND i.indexrelid=ic.oid "
                  + "AND ic.oid=a.attrelid "
                  + "AND i.indisprimary "
          + "ORDER BY "

                   // orderby is as follows getExported, orders by FKTABLE,
                   // getImported orders by PKTABLE
                   // getCrossReference orders by FKTABLE, so this should work for both,
                   // since when getting crossreference, primaryTable will be defined

                  +   (primaryTable != null ? "frelname" : "prelname") + ",keyseq");

// returns the following columns
// and some example data with a table defined as follows

// create table people ( id int primary key);
// create table policy ( id int primary key);
// create table users  ( id int primary key, people_id int references people(id), policy_id int references policy(id))

// prelname | frelname | tgconstrname | keyseq | fkeyName    | tgdeferrable | tginitdeferred
//    1     |    2     |      3       |    4   |     5       |       6      |    7

//  people  | users    | <unnamed>    |    1   | people_pkey |       f      |    f

// | tgnargs |                        tgargs                                      | updaterule           | deleterule
// |    8    |                          9                                         |    10                |    11
// |    6    | <unnamed>\000users\000people\000UNSPECIFIED\000people_id\000id\000 | RI_FKey_noaction_upd | RI_FKey_noaction_del

                Vector tuples = new Vector();


                while ( rs.next() )
                {
                        byte tuple[][] = new byte[14][];

      tuple[2] = rs.getBytes(1); //PKTABLE_NAME
      tuple[6] = rs.getBytes(2); //FKTABLE_NAME
      String fKeyName = rs.getString(3);
      String updateRule = rs.getString(10);

      if (updateRule != null )
      {
        // Rules look like this RI_FKey_noaction_del so we want to pull out the part between the 'Key_' and the last '_' s

        String rule = updateRule.substring(8, updateRule.length() - 4);

        int action = java.sql.DatabaseMetaData.importedKeyNoAction;

        if ( rule == null || "noaction".equals(rule) )
           action = java.sql.DatabaseMetaData.importedKeyNoAction;
        if ("cascade".equals(rule))
          action = java.sql.DatabaseMetaData.importedKeyCascade;
        else if ("setnull".equals(rule))
          action = java.sql.DatabaseMetaData.importedKeySetNull;
        else if ("setdefault".equals(rule))
          action = java.sql.DatabaseMetaData.importedKeySetDefault;
        else if ("restrict".equals(rule))
          action = java.sql.DatabaseMetaData.importedKeyRestrict;

        tuple[9] = Integer.toString(action).getBytes();

      }

      String deleteRule = rs.getString(11);

      if ( deleteRule != null )
      {

        String rule = updateRule.substring(8, updateRule.length() - 4);

        int action = java.sql.DatabaseMetaData.importedKeyNoAction;
        if ("cascade".equals(rule))
          action = java.sql.DatabaseMetaData.importedKeyCascade;
        else if ("setnull".equals(rule))
          action = java.sql.DatabaseMetaData.importedKeySetNull;
        else if ("setdefault".equals(rule))
          action = java.sql.DatabaseMetaData.importedKeySetDefault;
        tuple[10] = Integer.toString(action).getBytes();
      }

2597

2598 2599 2600
      // Parse the tgargs data
      String fkeyColumn="";
      String pkeyColumn="";
2601 2602


2603 2604 2605 2606
      // Note, I am guessing at most of this, but it should be close
      // if not, please correct
      // the keys are in pairs and start after the first four arguments
      // the arguments are seperated by \000
2607

2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655
      int keySequence = rs.getInt(4); //KEY_SEQ

      // get the args
      String targs = rs.getString(9);

      // args look like this
      //<unnamed>\000ww\000vv\000UNSPECIFIED\000m\000a\000n\000b\000
      // we are primarily interested in the column names which are the last items in the string

      StringTokenizer st = new StringTokenizer(targs, "\\000");

      int advance = 4 + (keySequence-1) * 2;
      for( int i=0; st.hasMoreTokens() && i < advance ; i++ ) st.nextToken(); // advance to the key column of interest

      if ( st.hasMoreTokens() )
      {
        fkeyColumn = st.nextToken();
      }
      if ( st.hasMoreTokens() )
      {
         pkeyColumn = st.nextToken();
      }

      tuple[3] = pkeyColumn.getBytes(); //PKCOLUMN_NAME
      tuple[7] = fkeyColumn.getBytes(); //FKCOLUMN_NAME

      tuple[8] =  rs.getBytes(4); //KEY_SEQ
      tuple[11] = targs.getBytes(); //FK_NAME this will give us a unique name for the foreign key
      tuple[12] = rs.getBytes(5); //PK_NAME

      // DEFERRABILITY
      int deferrability = java.sql.DatabaseMetaData.importedKeyNotDeferrable;
      boolean deferrable = rs.getBoolean(6);
      boolean initiallyDeferred = rs.getBoolean(7);
      if (deferrable)
      {
        if (initiallyDeferred)
                deferrability = java.sql.DatabaseMetaData.importedKeyInitiallyDeferred;
        else
                deferrability = java.sql.DatabaseMetaData.importedKeyInitiallyImmediate;
      }
      tuple[13] = Integer.toString(deferrability).getBytes();

      tuples.addElement(tuple);
    }

    return connection.getResultSet(null, f, tuples, "OK", 1);
  }
2656

2657
	/*
2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707
	 * Get a description of the primary key columns that are
	 * referenced by a table's foreign key columns (the primary keys
	 * imported by a table).  They are ordered by PKTABLE_CAT,
	 * PKTABLE_SCHEM, PKTABLE_NAME, and KEY_SEQ.
	 *
	 * <P>Each primary key column description has the following columns:
	 *	<OL>
	 *	<LI><B>PKTABLE_CAT</B> String => primary key table catalog
	 *		being imported (may be null)
	 *	<LI><B>PKTABLE_SCHEM</B> String => primary key table schema
	 *		being imported (may be null)
	 *	<LI><B>PKTABLE_NAME</B> String => primary key table name
	 *		being imported
	 *	<LI><B>PKCOLUMN_NAME</B> String => primary key column name
	 *		being imported
	 *	<LI><B>FKTABLE_CAT</B> String => foreign key table catalog (may be null)
	 *	<LI><B>FKTABLE_SCHEM</B> String => foreign key table schema (may be null)
	 *	<LI><B>FKTABLE_NAME</B> String => foreign key table name
	 *	<LI><B>FKCOLUMN_NAME</B> String => foreign key column name
	 *	<LI><B>KEY_SEQ</B> short => sequence number within foreign key
	 *	<LI><B>UPDATE_RULE</B> short => What happens to
	 *		 foreign key when primary is updated:
	 *		<UL>
	 *		<LI> importedKeyCascade - change imported key to agree
	 *				 with primary key update
	 *		<LI> importedKeyRestrict - do not allow update of primary
	 *				 key if it has been imported
	 *		<LI> importedKeySetNull - change imported key to NULL if
	 *				 its primary key has been updated
	 *		</UL>
	 *	<LI><B>DELETE_RULE</B> short => What happens to
	 *		the foreign key when primary is deleted.
	 *		<UL>
	 *		<LI> importedKeyCascade - delete rows that import a deleted key
	 *		<LI> importedKeyRestrict - do not allow delete of primary
	 *				 key if it has been imported
	 *		<LI> importedKeySetNull - change imported key to NULL if
	 *				 its primary key has been deleted
	 *		</UL>
	 *	<LI><B>FK_NAME</B> String => foreign key name (may be null)
	 *	<LI><B>PK_NAME</B> String => primary key name (may be null)
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schema a schema name pattern; "" retrieves those
	 * without a schema
	 * @param table a table name
	 * @return ResultSet each row is a primary key column description
	 * @see #getExportedKeys
	 */
2708 2709 2710 2711
	public java.sql.ResultSet getImportedKeys(String catalog, String schema, String table) throws SQLException
	{
		return getImportedExportedKeys(catalog, schema, null, table);
	}
2712

2713
	/*
2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767
	 * Get a description of a foreign key columns that reference a
	 * table's primary key columns (the foreign keys exported by a
	 * table).	They are ordered by FKTABLE_CAT, FKTABLE_SCHEM,
	 * FKTABLE_NAME, and KEY_SEQ.
	 *
	 * This method is currently unimplemented.
	 *
	 * <P>Each foreign key column description has the following columns:
	 *	<OL>
	 *	<LI><B>PKTABLE_CAT</B> String => primary key table catalog (may be null)
	 *	<LI><B>PKTABLE_SCHEM</B> String => primary key table schema (may be null)
	 *	<LI><B>PKTABLE_NAME</B> String => primary key table name
	 *	<LI><B>PKCOLUMN_NAME</B> String => primary key column name
	 *	<LI><B>FKTABLE_CAT</B> String => foreign key table catalog (may be null)
	 *		being exported (may be null)
	 *	<LI><B>FKTABLE_SCHEM</B> String => foreign key table schema (may be null)
	 *		being exported (may be null)
	 *	<LI><B>FKTABLE_NAME</B> String => foreign key table name
	 *		being exported
	 *	<LI><B>FKCOLUMN_NAME</B> String => foreign key column name
	 *		being exported
	 *	<LI><B>KEY_SEQ</B> short => sequence number within foreign key
	 *	<LI><B>UPDATE_RULE</B> short => What happens to
	 *		 foreign key when primary is updated:
	 *		<UL>
	 *		<LI> importedKeyCascade - change imported key to agree
	 *				 with primary key update
	 *		<LI> importedKeyRestrict - do not allow update of primary
	 *				 key if it has been imported
	 *		<LI> importedKeySetNull - change imported key to NULL if
	 *				 its primary key has been updated
	 *		</UL>
	 *	<LI><B>DELETE_RULE</B> short => What happens to
	 *		the foreign key when primary is deleted.
	 *		<UL>
	 *		<LI> importedKeyCascade - delete rows that import a deleted key
	 *		<LI> importedKeyRestrict - do not allow delete of primary
	 *				 key if it has been imported
	 *		<LI> importedKeySetNull - change imported key to NULL if
	 *				 its primary key has been deleted
	 *		</UL>
	 *	<LI><B>FK_NAME</B> String => foreign key identifier (may be null)
	 *	<LI><B>PK_NAME</B> String => primary key identifier (may be null)
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schema a schema name pattern; "" retrieves those
	 * without a schema
	 * @param table a table name
	 * @return ResultSet each row is a foreign key column description
	 * @see #getImportedKeys
	 */
	public java.sql.ResultSet getExportedKeys(String catalog, String schema, String table) throws SQLException
	{
2768
		return getImportedExportedKeys(catalog, schema, table, null);
2769 2770
	}

2771
	/*
2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828
	 * Get a description of the foreign key columns in the foreign key
	 * table that reference the primary key columns of the primary key
	 * table (describe how one table imports another's key.) This
	 * should normally return a single foreign key/primary key pair
	 * (most tables only import a foreign key from a table once.)  They
	 * are ordered by FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, and
	 * KEY_SEQ.
	 *
	 * This method is currently unimplemented.
	 *
	 * <P>Each foreign key column description has the following columns:
	 *	<OL>
	 *	<LI><B>PKTABLE_CAT</B> String => primary key table catalog (may be null)
	 *	<LI><B>PKTABLE_SCHEM</B> String => primary key table schema (may be null)
	 *	<LI><B>PKTABLE_NAME</B> String => primary key table name
	 *	<LI><B>PKCOLUMN_NAME</B> String => primary key column name
	 *	<LI><B>FKTABLE_CAT</B> String => foreign key table catalog (may be null)
	 *		being exported (may be null)
	 *	<LI><B>FKTABLE_SCHEM</B> String => foreign key table schema (may be null)
	 *		being exported (may be null)
	 *	<LI><B>FKTABLE_NAME</B> String => foreign key table name
	 *		being exported
	 *	<LI><B>FKCOLUMN_NAME</B> String => foreign key column name
	 *		being exported
	 *	<LI><B>KEY_SEQ</B> short => sequence number within foreign key
	 *	<LI><B>UPDATE_RULE</B> short => What happens to
	 *		 foreign key when primary is updated:
	 *		<UL>
	 *		<LI> importedKeyCascade - change imported key to agree
	 *				 with primary key update
	 *		<LI> importedKeyRestrict - do not allow update of primary
	 *				 key if it has been imported
	 *		<LI> importedKeySetNull - change imported key to NULL if
	 *				 its primary key has been updated
	 *		</UL>
	 *	<LI><B>DELETE_RULE</B> short => What happens to
	 *		the foreign key when primary is deleted.
	 *		<UL>
	 *		<LI> importedKeyCascade - delete rows that import a deleted key
	 *		<LI> importedKeyRestrict - do not allow delete of primary
	 *				 key if it has been imported
	 *		<LI> importedKeySetNull - change imported key to NULL if
	 *				 its primary key has been deleted
	 *		</UL>
	 *	<LI><B>FK_NAME</B> String => foreign key identifier (may be null)
	 *	<LI><B>PK_NAME</B> String => primary key identifier (may be null)
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schema a schema name pattern; "" retrieves those
	 * without a schema
	 * @param table a table name
	 * @return ResultSet each row is a foreign key column description
	 * @see #getImportedKeys
	 */
	public java.sql.ResultSet getCrossReference(String primaryCatalog, String primarySchema, String primaryTable, String foreignCatalog, String foreignSchema, String foreignTable) throws SQLException
	{
2829
		return getImportedExportedKeys(primaryCatalog, primarySchema, primaryTable, foreignTable);
2830 2831
	}

2832
	/*
2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909
	 * Get a description of all the standard SQL types supported by
	 * this database. They are ordered by DATA_TYPE and then by how
	 * closely the data type maps to the corresponding JDBC SQL type.
	 *
	 * <P>Each type description has the following columns:
	 *	<OL>
	 *	<LI><B>TYPE_NAME</B> String => Type name
	 *	<LI><B>DATA_TYPE</B> short => SQL data type from java.sql.Types
	 *	<LI><B>PRECISION</B> int => maximum precision
	 *	<LI><B>LITERAL_PREFIX</B> String => prefix used to quote a literal
	 *		(may be null)
	 *	<LI><B>LITERAL_SUFFIX</B> String => suffix used to quote a literal
	 (may be null)
	 *	<LI><B>CREATE_PARAMS</B> String => parameters used in creating
	 *		the type (may be null)
	 *	<LI><B>NULLABLE</B> short => can you use NULL for this type?
	 *		<UL>
	 *		<LI> typeNoNulls - does not allow NULL values
	 *		<LI> typeNullable - allows NULL values
	 *		<LI> typeNullableUnknown - nullability unknown
	 *		</UL>
	 *	<LI><B>CASE_SENSITIVE</B> boolean=> is it case sensitive?
	 *	<LI><B>SEARCHABLE</B> short => can you use "WHERE" based on this type:
	 *		<UL>
	 *		<LI> typePredNone - No support
	 *		<LI> typePredChar - Only supported with WHERE .. LIKE
	 *		<LI> typePredBasic - Supported except for WHERE .. LIKE
	 *		<LI> typeSearchable - Supported for all WHERE ..
	 *		</UL>
	 *	<LI><B>UNSIGNED_ATTRIBUTE</B> boolean => is it unsigned?
	 *	<LI><B>FIXED_PREC_SCALE</B> boolean => can it be a money value?
	 *	<LI><B>AUTO_INCREMENT</B> boolean => can it be used for an
	 *		auto-increment value?
	 *	<LI><B>LOCAL_TYPE_NAME</B> String => localized version of type name
	 *		(may be null)
	 *	<LI><B>MINIMUM_SCALE</B> short => minimum scale supported
	 *	<LI><B>MAXIMUM_SCALE</B> short => maximum scale supported
	 *	<LI><B>SQL_DATA_TYPE</B> int => unused
	 *	<LI><B>SQL_DATETIME_SUB</B> int => unused
	 *	<LI><B>NUM_PREC_RADIX</B> int => usually 2 or 10
	 *	</OL>
	 *
	 * @return ResultSet each row is a SQL type description
	 */
	public java.sql.ResultSet getTypeInfo() throws SQLException
	{
		java.sql.ResultSet rs = connection.ExecSQL("select typname from pg_type");
		if (rs != null)
		{
			Field f[] = new Field[18];
			ResultSet r;	// ResultSet for the SQL query that we need to do
			Vector v = new Vector();		// The new ResultSet tuple stuff

			f[0] = new Field(connection, "TYPE_NAME", iVarcharOid, 32);
			f[1] = new Field(connection, "DATA_TYPE", iInt2Oid, 2);
			f[2] = new Field(connection, "PRECISION", iInt4Oid, 4);
			f[3] = new Field(connection, "LITERAL_PREFIX", iVarcharOid, 32);
			f[4] = new Field(connection, "LITERAL_SUFFIX", iVarcharOid, 32);
			f[5] = new Field(connection, "CREATE_PARAMS", iVarcharOid, 32);
			f[6] = new Field(connection, "NULLABLE", iInt2Oid, 2);
			f[7] = new Field(connection, "CASE_SENSITIVE", iBoolOid, 1);
			f[8] = new Field(connection, "SEARCHABLE", iInt2Oid, 2);
			f[9] = new Field(connection, "UNSIGNED_ATTRIBUTE", iBoolOid, 1);
			f[10] = new Field(connection, "FIXED_PREC_SCALE", iBoolOid, 1);
			f[11] = new Field(connection, "AUTO_INCREMENT", iBoolOid, 1);
			f[12] = new Field(connection, "LOCAL_TYPE_NAME", iVarcharOid, 32);
			f[13] = new Field(connection, "MINIMUM_SCALE", iInt2Oid, 2);
			f[14] = new Field(connection, "MAXIMUM_SCALE", iInt2Oid, 2);
			f[15] = new Field(connection, "SQL_DATA_TYPE", iInt4Oid, 4);
			f[16] = new Field(connection, "SQL_DATETIME_SUB", iInt4Oid, 4);
			f[17] = new Field(connection, "NUM_PREC_RADIX", iInt4Oid, 4);

			// cache some results, this will keep memory useage down, and speed
			// things up a little.
			byte b9[] = "9".getBytes();
			byte b10[] = "10".getBytes();
			byte bf[] = "f".getBytes();
2910 2911
			byte bnn[] = Integer.toString(java.sql.DatabaseMetaData.typeNoNulls).getBytes();
			byte bts[] = Integer.toString(java.sql.DatabaseMetaData.typeSearchable).getBytes();
2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932

			while (rs.next())
			{
				byte[][] tuple = new byte[18][];
				String typname = rs.getString(1);
				tuple[0] = typname.getBytes();
				tuple[1] = Integer.toString(connection.getSQLType(typname)).getBytes();
				tuple[2] = b9;	// for now
				tuple[6] = bnn; // for now
				tuple[7] = bf; // false for now - not case sensitive
				tuple[8] = bts;
				tuple[9] = bf; // false for now - it's signed
				tuple[10] = bf; // false for now - must handle money
				tuple[11] = bf; // false for now - handle autoincrement
				// 12 - LOCAL_TYPE_NAME is null
				// 13 & 14 ?
				// 15 & 16 are unused so we return null
				tuple[17] = b10; // everything is base 10
				v.addElement(tuple);
			}
			rs.close();
2933
			return connection.getResultSet(null, f, v, "OK", 1);
2934 2935 2936 2937 2938
		}

		throw new PSQLException("postgresql.metadata.unavailable");
	}

2939
	/*
2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026 3027 3028 3029 3030 3031 3032 3033 3034 3035 3036 3037 3038 3039 3040
	 * Get a description of a table's indices and statistics. They are
	 * ordered by NON_UNIQUE, TYPE, INDEX_NAME, and ORDINAL_POSITION.
	 *
	 * <P>Each index column description has the following columns:
	 *	<OL>
	 *	<LI><B>TABLE_CAT</B> String => table catalog (may be null)
	 *	<LI><B>TABLE_SCHEM</B> String => table schema (may be null)
	 *	<LI><B>TABLE_NAME</B> String => table name
	 *	<LI><B>NON_UNIQUE</B> boolean => Can index values be non-unique?
	 *		false when TYPE is tableIndexStatistic
	 *	<LI><B>INDEX_QUALIFIER</B> String => index catalog (may be null);
	 *		null when TYPE is tableIndexStatistic
	 *	<LI><B>INDEX_NAME</B> String => index name; null when TYPE is
	 *		tableIndexStatistic
	 *	<LI><B>TYPE</B> short => index type:
	 *		<UL>
	 *		<LI> tableIndexStatistic - this identifies table statistics that are
	 *			 returned in conjuction with a table's index descriptions
	 *		<LI> tableIndexClustered - this is a clustered index
	 *		<LI> tableIndexHashed - this is a hashed index
	 *		<LI> tableIndexOther - this is some other style of index
	 *		</UL>
	 *	<LI><B>ORDINAL_POSITION</B> short => column sequence number
	 *		within index; zero when TYPE is tableIndexStatistic
	 *	<LI><B>COLUMN_NAME</B> String => column name; null when TYPE is
	 *		tableIndexStatistic
	 *	<LI><B>ASC_OR_DESC</B> String => column sort sequence, "A" => ascending
	 *		"D" => descending, may be null if sort sequence is not supported;
	 *		null when TYPE is tableIndexStatistic
	 *	<LI><B>CARDINALITY</B> int => When TYPE is tableIndexStatisic then
	 *		this is the number of rows in the table; otherwise it is the
	 *		number of unique values in the index.
	 *	<LI><B>PAGES</B> int => When TYPE is  tableIndexStatisic then
	 *		this is the number of pages used for the table, otherwise it
	 *		is the number of pages used for the current index.
	 *	<LI><B>FILTER_CONDITION</B> String => Filter condition, if any.
	 *		(may be null)
	 *	</OL>
	 *
	 * @param catalog a catalog name; "" retrieves those without a catalog
	 * @param schema a schema name pattern; "" retrieves those without a schema
	 * @param table a table name
	 * @param unique when true, return only indices for unique values;
	 *	   when false, return indices regardless of whether unique or not
	 * @param approximate when true, result is allowed to reflect approximate
	 *	   or out of data values; when false, results are requested to be
	 *	   accurate
	 * @return ResultSet each row is an index column description
	 */
	// Implementation note: This is required for Borland's JBuilder to work
	public java.sql.ResultSet getIndexInfo(String catalog, String schema, String tableName, boolean unique, boolean approximate) throws SQLException
	{
		Field f[] = new Field[13];
		java.sql.ResultSet r;	// ResultSet for the SQL query that we need to do
		Vector v = new Vector();		// The new ResultSet tuple stuff

		f[0] = new Field(connection, "TABLE_CAT", iVarcharOid, 32);
		f[1] = new Field(connection, "TABLE_SCHEM", iVarcharOid, 32);
		f[2] = new Field(connection, "TABLE_NAME", iVarcharOid, 32);
		f[3] = new Field(connection, "NON_UNIQUE", iBoolOid, 1);
		f[4] = new Field(connection, "INDEX_QUALIFIER", iVarcharOid, 32);
		f[5] = new Field(connection, "INDEX_NAME", iVarcharOid, 32);
		f[6] = new Field(connection, "TYPE", iInt2Oid, 2);
		f[7] = new Field(connection, "ORDINAL_POSITION", iInt2Oid, 2);
		f[8] = new Field(connection, "COLUMN_NAME", iVarcharOid, 32);
		f[9] = new Field(connection, "ASC_OR_DESC", iVarcharOid, 32);
		f[10] = new Field(connection, "CARDINALITY", iInt4Oid, 4);
		f[11] = new Field(connection, "PAGES", iInt4Oid, 4);
		f[12] = new Field(connection, "FILTER_CONDITION", iVarcharOid, 32);

		r = connection.ExecSQL("select " +
							   "c.relname, " +
							   "x.indisunique, " +
							   "i.relname, " +
							   "x.indisclustered, " +
							   "a.amname, " +
							   "x.indkey, " +
							   "c.reltuples, " +
							   "c.relpages, " +
							   "x.indexrelid " +
							   "FROM pg_index x, pg_class c, pg_class i, pg_am a " +
							   "WHERE ((c.relname = '" + tableName.toLowerCase() + "') " +
							   " AND (c.oid = x.indrelid) " +
							   " AND (i.oid = x.indexrelid) " +
							   " AND (i.relam = a.oid)) " +
							   "ORDER BY x.indisunique DESC, " +
							   " x.indisclustered, a.amname, i.relname");
		while (r.next())
		{
			// indkey is an array of column ordinals (integers).  In the JDBC
			// interface, this has to be separated out into a separate
			// tuple for each indexed column.  Also, getArray() is not yet
			// implemented for Postgres JDBC, so we parse by hand.
			String columnOrdinalString = r.getString(6);
			StringTokenizer stok = new StringTokenizer(columnOrdinalString);
			int [] columnOrdinals = new int[stok.countTokens()];
			int o = 0;
			while (stok.hasMoreTokens())
			{
				columnOrdinals[o++] = Integer.parseInt(stok.nextToken());
			}
Dave Cramer's avatar
Dave Cramer committed
3041
			java.sql.ResultSet columnNameRS = connection.ExecSQL("select a.attname FROM pg_attribute a WHERE a.attrelid = " + r.getInt(9));
3042 3043 3044 3045 3046 3047
			for (int i = 0; i < columnOrdinals.length; i++)
			{
				byte [] [] tuple = new byte [13] [];
				tuple[0] = "".getBytes();
				tuple[1] = "".getBytes();
				tuple[2] = r.getBytes(1);
Dave Cramer's avatar
Dave Cramer committed
3048
				tuple[3] = r.getBoolean(2) ? "false".getBytes() : "true".getBytes();
3049 3050 3051
				tuple[4] = null;
				tuple[5] = r.getBytes(3);
				tuple[6] = r.getBoolean(4) ?
3052
						   Integer.toString(java.sql.DatabaseMetaData.tableIndexClustered).getBytes() :
3053
						   r.getString(5).equals("hash") ?
3054 3055
						   Integer.toString(java.sql.DatabaseMetaData.tableIndexHashed).getBytes() :
						   Integer.toString(java.sql.DatabaseMetaData.tableIndexOther).getBytes();
3056
				tuple[7] = Integer.toString(i + 1).getBytes();
Dave Cramer's avatar
Dave Cramer committed
3057 3058 3059 3060 3061 3062 3063 3064
				if (columnNameRS.next())
				{
					tuple[8] = columnNameRS.getBytes(1);
				}
				else
				{
					tuple[8] = "".getBytes();
				}
3065 3066 3067 3068 3069 3070 3071 3072
				tuple[9] = null;  // sort sequence ???
				tuple[10] = r.getBytes(7);	// inexact
				tuple[11] = r.getBytes(8);
				tuple[12] = null;
				v.addElement(tuple);
			}
		}

3073
		return connection.getResultSet(null, f, v, "OK", 1);
3074
	}
Peter Mount's avatar
Peter Mount committed
3075

3076
}