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Postgres FD Implementation
Commit e7cad7b0 authored by Bruce Momjian's avatar Bruce Momjian
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Add TRUNCATE command, with psql help and sgml additions.

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doc/src/sgml/ref/truncate.sgml 0 → 100644
View file @ e7cad7b0
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/ref/truncate.sgml,v 1.1 1999/09/23 17:02:28 momjian Exp $
Postgres documentation
-->
<refentry id="SQL-TRUNCATE">
<refmeta>
<refentrytitle id="SQL-TRUNCATE-TITLE">
TRUNCATE
</refentrytitle>
<refmiscinfo>SQL - Language Statements</refmiscinfo>
</refmeta>
<refnamediv>
<refname>
TRUNCATE
</refname>
<refpurpose>
Close a cursor
</refpurpose>
</refnamediv>
<refsynopsisdiv>
<refsynopsisdivinfo>
<date>1999-07-20</date>
</refsynopsisdivinfo>
<synopsis>
TRUNCATE TABLE <replaceable class="PARAMETER">table</replaceable>
</synopsis>
<refsect2 id="R2-SQL-TRUNCATE-1">
<refsect2info>
<date>1998-09-08</date>
</refsect2info>
<title>
Inputs
</title>
<para>
<variablelist>
<varlistentry>
<term><replaceable class="PARAMETER">table</replaceable></term>
<listitem>
<para>
The table name to truncate.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
<refsect2 id="R2-SQL-TRUNCATE-2">
<refsect2info>
<date>1998-09-08</date>
</refsect2info>
<title>
Outputs
</title>
<para>
<variablelist>
<varlistentry>
<term><computeroutput>
TRUNCATE
</computeroutput></term>
<listitem>
<para>
Message returned if the table is successfully truncated.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</refsect2>
</refsynopsisdiv>
<refsect1 id="R1-SQL-TRUNCATE-1">
<refsect1info>
<date>1998-09-08</date>
</refsect1info>
<title>
Description
</title>
<para>
<command>TRUNCATE</command> quickly removes all rows from a table.
</para>
<refsect1 id="R1-SQL-TRUNCATE-2">
<title>
Usage
</title>
<para>
Truncate the table bigtable.
</para>
<programlisting>
TRUNCATE TABLE bigtable;
</programlisting>
</refsect1>
<refsect1 id="R1-SQL-TRUNCATE-3">
<title>
Compatibility
</title>
<refsect2 id="R2-SQL-TRUNCATE-4">
<refsect2info>
<date>1998-09-08</date>
</refsect2info>
<title>
SQL92
</title>
<para>
There is no <command>TRUNCATE</command> in <acronym>SQL92</acronym>.
</para>
</refsect2>
</refsect1>
</refentry>
<!-- Keep this comment at the end of the file
Local variables:
mode: sgml
sgml-omittag:t
sgml-shorttag:t
sgml-minimize-attributes:nil
sgml-always-quote-attributes:t
sgml-indent-step:1
sgml-indent-data:t
sgml-parent-document:nil
sgml-default-dtd-file:"../reference.ced"
sgml-exposed-tags:nil
sgml-local-catalogs:"/usr/lib/sgml/catalog"
sgml-local-ecat-files:nil
End:
-->
src/backend/catalog/heap.c
View file @ e7cad7b0
......@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.96 1999/09/18 19:06:33 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/catalog/heap.c,v 1.97 1999/09/23 17:02:34 momjian Exp $
*
*
* INTERFACE ROUTINES
......@@ -30,6 +30,7 @@
#include "miscadmin.h"
#include "access/heapam.h"
#include "access/genam.h"
#include "access/xact.h"
#include "catalog/catalog.h"
#include "catalog/catname.h"
......@@ -40,6 +41,7 @@
#include "catalog/pg_index.h"
#include "catalog/pg_inherits.h"
#include "catalog/pg_ipl.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_relcheck.h"
#include "commands/trigger.h"
#include "optimizer/tlist.h"
......@@ -49,6 +51,7 @@
#include "storage/smgr.h"
#include "tcop/tcopprot.h"
#include "utils/builtins.h"
#include "utils/portal.h"
#include "utils/relcache.h"
#include "utils/syscache.h"
#include "utils/temprel.h"
......@@ -1056,6 +1059,233 @@ DeleteRelationTuple(Relation rel)
heap_close(pg_class_desc, RowExclusiveLock);
}
/* --------------------------------
* RelationTruncateIndexes - This routine is used to truncate all
* indices associated with the heap relation to zero tuples.
* The routine will truncate and then reconstruct the indices on
* the relation specified by the heapRelation parameter.
* --------------------------------
*/
static void
RelationTruncateIndexes(Relation heapRelation) {
Relation indexRelation, currentIndex;
ScanKeyData entry;
HeapScanDesc scan;
HeapTuple indexTuple, procTuple, classTuple;
Form_pg_index index;
Oid heapId, indexId, procId, accessMethodId;
Node *oldPred = NULL;
PredInfo *predInfo;
List *cnfPred = NULL;
AttrNumber *attributeNumberA;
FuncIndexInfo fInfo, *funcInfo = NULL;
int i, numberOfAttributes;
char *predString;
/*** Save the id of the heap relation ***/
heapId = RelationGetRelid(heapRelation);
/*** Open the System relation, pg_index ***/
indexRelation = heap_openr(IndexRelationName);
/*** Scan pg_index For indexes related to heap relation ***/
ScanKeyEntryInitialize(&entry, 0x0, Anum_pg_index_indrelid, F_OIDEQ,
ObjectIdGetDatum(heapId));
scan = heap_beginscan(indexRelation, false, SnapshotNow, 1, &entry);
while (HeapTupleIsValid(indexTuple = heap_getnext(scan, 0))) {
/*** For each index, fetch index attributes ***/
index = (Form_pg_index) GETSTRUCT(indexTuple);
indexId = index->indexrelid;
procId = index->indproc;
for (i = 0; i < INDEX_MAX_KEYS; i++) {
if (index->indkey[i] == InvalidAttrNumber) break;
}
numberOfAttributes = i;
/*** If a valid where predicate, compute predicate Node ***/
if (VARSIZE(&index->indpred) != 0) {
predString = fmgr(F_TEXTOUT, &index->indpred);
oldPred = stringToNode(predString);
pfree(predString);
}
predInfo = (PredInfo *) palloc(sizeof(PredInfo));
predInfo->pred = (Node *) cnfPred;
/* predInfo->pred = (Node *) oldPred; */
predInfo->oldPred = oldPred;
/*** Assign Index keys to attributes array ***/
attributeNumberA = (AttrNumber *) palloc(numberOfAttributes *
sizeof(attributeNumberA[0]));
for (i = 0; i < numberOfAttributes; i++) {
attributeNumberA[i] = index->indkey[i];
}
/*** If this is a procedural index, initialize our FuncIndexInfo ***/
if (procId != InvalidOid) {
funcInfo = &fInfo;
FIsetnArgs(funcInfo, numberOfAttributes);
procTuple = SearchSysCacheTuple(PROOID, ObjectIdGetDatum(procId),
0, 0, 0);
if (!HeapTupleIsValid(procTuple)) {
elog(ERROR, "RelationTruncateIndexes: index procedure not found");
}
namecpy(&(funcInfo->funcName),
&(((Form_pg_proc) GETSTRUCT(procTuple))->proname));
FIsetProcOid(funcInfo, procTuple->t_data->t_oid);
}
/*** Fetch the classTuple associated with this index ***/
classTuple = SearchSysCacheTupleCopy(RELOID, ObjectIdGetDatum(indexId),
0, 0, 0);
if (!HeapTupleIsValid(classTuple)) {
elog(ERROR, "RelationTruncateIndexes: index access method not found");
}
accessMethodId = ((Form_pg_class) GETSTRUCT(classTuple))->relam;
/*** Open our index relation ***/
currentIndex = index_open(indexId);
if (currentIndex == NULL) {
elog(ERROR, "RelationTruncateIndexes: can't open index relation");
}
/*** Truncate the index before building ***/
smgrtruncate(DEFAULT_SMGR, currentIndex, 0);
currentIndex->rd_nblocks = 0;
/*** Initialize the index and rebuild ***/
InitIndexStrategy(numberOfAttributes, currentIndex, accessMethodId);
index_build(heapRelation, currentIndex, numberOfAttributes,
attributeNumberA, 0, NULL, funcInfo, predInfo);
/*** Re-open our heap relation and re-lock, since index_build ***/
/*** will close and unlock the relation ***/
heapRelation = heap_open(heapId);
LockRelation(heapRelation, AccessExclusiveLock);
/*** RelationUnsetLockForWrite(currentIndex); ***/
}
/*** Complete the scan and close the Catalogueindex Relation ***/
heap_endscan(scan);
heap_close(indexRelation);
}
/* ----------------------------
* heap_truncate
*
* This routine is used to truncate the data from the
* storange manager of any data within the relation handed
* to this routine. The routine assumes that the relation
* handed to this routine is an open relation.
*
* ----------------------------
*/
void
heap_truncate(char *relname) {
Relation rel;
Oid rid;
Portal portal;
char *pname;
MemoryContext old;
PortalVariableMemory pmem;
NameData truncRel;
/*
* Create a portal for safe memory across transctions. We need to
* palloc the name space for it because our hash function expects the
* name to be on a longword boundary. CreatePortal copies the name to
* safe storage for us.
*/
pname = (char *) palloc(strlen(TRUNCPNAME) + 1);
strcpy(pname, TRUNCPNAME);
portal = CreatePortal(pname);
pfree(pname);
/* relname gets de-allocated on transaction commit */
strcpy(truncRel.data, relname);
pmem = PortalGetVariableMemory(portal);
old = MemoryContextSwitchTo((MemoryContext) pmem);
MemoryContextSwitchTo(old);
/* Commit the current transaction */
CommitTransactionCommand();
StartTransactionCommand();
/* Open relation for processing */
rel = heap_openr(truncRel.data);
if (rel == NULL)
elog(ERROR, "Relation %s Does Not Exist!", truncRel.data);
rid = rel->rd_id;
LockRelation(rel, AccessExclusiveLock);
/* Release any buffers associated with this relation */
ReleaseRelationBuffers(rel);
BlowawayRelationBuffers(rel, 0);
/* Now truncate the actual data and set blocks to zero */
smgrtruncate(DEFAULT_SMGR, rel, 0);
rel->rd_nblocks = 0;
/* If this relation has indexes, truncate the indexes, which */
/* will unlock the relation as a result. Otherwise, unlock */
/* the relation ourselves. */
if (rel->rd_rel->relhasindex) {
RelationTruncateIndexes(rel);
} else {
UnlockRelation(rel, AccessExclusiveLock);
}
/* Close our relation */
heap_close(rel);
RelationForgetRelation(rid);
/* Destoy cross-transaction memory */
PortalDestroy(&portal);
/* Start new transaction */
CommitTransactionCommand();
StartTransactionCommand();
return;
}
/* --------------------------------
* DeleteAttributeTuples
*
......
src/backend/commands/creatinh.c
View file @ e7cad7b0
......@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/creatinh.c,v 1.46 1999/09/18 19:06:40 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/commands/Attic/creatinh.c,v 1.47 1999/09/23 17:02:40 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -157,6 +157,26 @@ RemoveRelation(char *name)
heap_destroy_with_catalog(name);
}
/*
* TruncateRelation --
* Removes all the rows from a relation
*
* Exceptions:
* BadArg if name is invalid
*
*
* Note:
* Rows are removed, indices are truncated and reconstructed.
*/
void
TruncateRelation(char *name)
{
AssertArg(name);
heap_truncate(name);
}
/*
* MergeAttributes
......
src/backend/parser/gram.y
View file @ e7cad7b0
......@@ -10,7 +10,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.98 1999/09/14 06:06:31 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.99 1999/09/23 17:02:46 momjian Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
......@@ -122,6 +122,7 @@ Oid param_type(int t); /* used in parse_expr.c */
%type <node> stmt,
AddAttrStmt, ClosePortalStmt,
CopyStmt, CreateStmt, CreateAsStmt, CreateSeqStmt, DefineStmt, DestroyStmt,
TruncateStmt,
ExtendStmt, FetchStmt, GrantStmt, CreateTrigStmt, DropTrigStmt,
CreatePLangStmt, DropPLangStmt,
IndexStmt, ListenStmt, UnlistenStmt, LockStmt, OptimizableStmt,
......@@ -318,7 +319,7 @@ Oid param_type(int t); /* used in parse_expr.c */
OFFSET, OIDS, OPERATOR, PASSWORD, PROCEDURAL,
RENAME, RESET, RETURNS, ROW, RULE,
SEQUENCE, SERIAL, SETOF, SHARE, SHOW, START, STATEMENT, STDIN, STDOUT,
TRUSTED,
TRUNCATE, TRUSTED,
UNLISTEN, UNTIL, VACUUM, VALID, VERBOSE, VERSION
/* Special keywords, not in the query language - see the "lex" file */
......@@ -384,6 +385,7 @@ stmt : AddAttrStmt
| ClusterStmt
| DefineStmt
| DestroyStmt
| TruncateStmt
| DropPLangStmt
| DropTrigStmt
| DropUserStmt
......@@ -1607,6 +1609,20 @@ DestroyStmt: DROP TABLE relation_name_list
}
;
/*****************************************************************************
*
* QUERY:
* truncate table relname
*
*****************************************************************************/
TruncateStmt: TRUNCATE TABLE relation_name
{
TruncateStmt *n = makeNode(TruncateStmt);
n->relName = $3;
$$ = (Node *)n;
}
;
/*****************************************************************************
*
......@@ -2371,7 +2387,6 @@ ClusterStmt: CLUSTER index_name ON relation_name
}
;
/*****************************************************************************
*
* QUERY:
......
src/backend/parser/keywords.c
View file @ e7cad7b0
......@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.60 1999/07/17 20:17:22 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/keywords.c,v 1.61 1999/09/23 17:02:46 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -225,6 +225,7 @@ static ScanKeyword ScanKeywords[] = {
{"trigger", TRIGGER},
{"trim", TRIM},
{"true", TRUE_P},
{"truncate", TRUNCATE},
{"trusted", TRUSTED},
{"type", TYPE_P},
{"union", UNION},
......
src/backend/tcop/utility.c
View file @ e7cad7b0
......@@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.65 1999/09/18 19:07:44 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/tcop/utility.c,v 1.66 1999/09/23 17:02:52 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -206,6 +206,38 @@ ProcessUtility(Node *parsetree,
}
break;
case T_TruncateStmt:
{
Relation rel;
PS_SET_STATUS(commandTag = "TRUNCATE");
CHECK_IF_ABORTED();
relname = ((TruncateStmt *) parsetree)->relName;
if (!allowSystemTableMods && IsSystemRelationName(relname)) {
elog(ERROR, "TRUNCATE cannot be used on system tables. '%s' is a system table",
relname);
}
rel = heap_openr(relname);
if (RelationIsValid(rel)) {
if (rel->rd_rel->relkind == RELKIND_SEQUENCE) {
elog(ERROR, "TRUNCATE cannot be used on sequences. '%s' is a sequence",
relname);
}
heap_close(rel);
}
#ifndef NO_SECURITY
if (!pg_ownercheck(userName, relname, RELNAME)) {
elog(ERROR, "you do not own class \"%s\"", relname);
}
#endif
TruncateRelation(((TruncateStmt *) parsetree)->relName);
}
break;
case T_CopyStmt:
{
CopyStmt *stmt = (CopyStmt *) parsetree;
......
src/backend/utils/mmgr/portalmem.c
View file @ e7cad7b0
......@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/mmgr/portalmem.c,v 1.29 1999/09/09 16:25:29 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/mmgr/portalmem.c,v 1.30 1999/09/23 17:02:58 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -410,6 +410,8 @@ PortalNameIsSpecial(char *pname)
{
if (strcmp(pname, VACPNAME) == 0)
return true;
if (strcmp(pname, TRUNCPNAME) == 0)
return true;
return false;
}
......
src/bin/psql/psqlHelp.h
View file @ e7cad7b0
......@@ -5,7 +5,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: psqlHelp.h,v 1.72 1999/07/11 22:47:21 ishii Exp $
* $Id: psqlHelp.h,v 1.73 1999/09/23 17:03:04 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -23,11 +23,11 @@ static struct _helpStruct QL_HELP[] = {
"\
\tabort [transaction|work];"},
{"alter table",
"add/rename attributes, rename tables",
"add/rename columns, rename tables",
"\
\tALTER TABLE class_name [*] ADD COLUMN attr type\n\
\tALTER TABLE class_name [*] RENAME [COLUMN] attr1 TO attr2\n\
\tALTER TABLE class_name1 RENAME TO class_name2"},
\tALTER TABLE tablename [*] ADD COLUMN colname type\n\
\tALTER TABLE tablename [*] RENAME [COLUMN] colname1 TO colname2\n\
\tALTER TABLE tablename1 RENAME TO tablename2"},
{"alter user",
"alter system information for a user",
"\
......@@ -56,7 +56,7 @@ static struct _helpStruct QL_HELP[] = {
{"copy",
"copy data to and from a table",
"\
\tCOPY [BINARY] class_name [WITH OIDS]\n\
\tCOPY [BINARY] tablename [WITH OIDS]\n\
\tTO|FROM filename|STDIN|STDOUT [USING DELIMITERS 'delim'];"},
{"create",
"Please be more specific:",
......@@ -93,8 +93,8 @@ static struct _helpStruct QL_HELP[] = {
{"create index",
"construct an index",
"\
\tCREATE [UNIQUE] INDEX indexname ON class_name [USING access_method]\n\
( attr1 [type_class1], ...attrN | funcname(attr1, ...) [type_class] );"},
\tCREATE [UNIQUE] INDEX indexname ON tablename [USING access_method]\n\
( colname1 [type_class1], ...colnameN | funcname(colname1, ...) [type_class] );"},
{"create operator",
"create a user-defined operator",
"\
......@@ -124,16 +124,16 @@ static struct _helpStruct QL_HELP[] = {
{"create table",
"create a new table",
"\
\tCREATE [TEMP] TABLE class_name\n\
\t(attr1 type1 [DEFAULT expression] [NOT NULL], ...attrN\n\
\tCREATE [TEMP] TABLE tablename\n\
\t(colname1 type1 [DEFAULT expression] [NOT NULL], ...colnameN\n\
\t[[CONSTRAINT name] CHECK condition1, ...conditionN] )\n\
\t[INHERITS (class_name1, ...class_nameN)\n\
\t[INHERITS (tablename1, ...tablenameN)\n\
;"},
{"create trigger",
"create a new trigger",
"\
\tCREATE TRIGGER trigger_name AFTER|BEFORE event1 [OR event2 [OR event3] ]\n\
\tON class_name FOR EACH ROW|STATEMENT\n\
\tON tablename FOR EACH ROW|STATEMENT\n\
\tEXECUTE PROCEDURE func_name ([arguments])\n\
\n\
\teventX is one of INSERT, DELETE, UPDATE"},
......@@ -159,8 +159,8 @@ static struct _helpStruct QL_HELP[] = {
"create a view",
"\
\tCREATE VIEW view_name AS\n\
\tSELECT [DISTINCT [ON attrN]]\n\
\texpr1 [AS attr1], ...exprN\n\
\tSELECT [DISTINCT [ON colnameN]]\n\
\texpr1 [AS colname1], ...exprN\n\
\t[FROM from_list]\n\
\t[WHERE qual]\n\
\t[GROUP BY group_list];"},
......@@ -168,18 +168,18 @@ static struct _helpStruct QL_HELP[] = {
"set up a cursor",
"\
\tDECLARE cursorname [BINARY] CURSOR FOR\n\
\tSELECT [DISTINCT [ON attrN]]\n\
\texpr1 [AS attr1], ...exprN\n\
\tSELECT [DISTINCT [ON colnameN]]\n\
\texpr1 [AS colname1], ...exprN\n\
\t[FROM from_list]\n\
\t[WHERE qual]\n\
\t[GROUP BY group_list]\n\
\t[HAVING having_clause]\n\
\t[ORDER BY attr1 [USING op1], ...attrN]\n\
\t[ORDER BY colname1 [USING op1], ...colnameN]\n\
\t[ { UNION [ALL] | INTERSECT | EXCEPT } SELECT ...];"},
{"delete",
"delete tuples",
"\
\tDELETE FROM class_name [WHERE qual];"},
\tDELETE FROM tablename [WHERE qual];"},
{"drop",
"Please be more specific:",
"\
......@@ -225,11 +225,11 @@ static struct _helpStruct QL_HELP[] = {
{"drop table",
"remove a table",
"\
\tDROP TABLE class_name1, ...class_nameN;"},
\tDROP TABLE tablename1, ...tablenameN;"},
{"drop trigger",
"remove a trigger",
"\
\tDROP TRIGGER trigger_name ON class_name;"},
\tDROP TRIGGER trigger_name ON tablename;"},
{"drop type",
"remove a user-defined base type",
"\
......@@ -263,9 +263,9 @@ static struct _helpStruct QL_HELP[] = {
{"insert",
"insert tuples",
"\
\tINSERT INTO class_name [(attr1, ...attrN)]\n\
\tINSERT INTO tablename [(colname1, ...colnameN)]\n\
\tVALUES (expr1,..exprN) |\n\
\tSELECT [DISTINCT [ON attrN]]\n\
\tSELECT [DISTINCT [ON colnameN]]\n\
\texpr1, ...exprN\n\
\t[FROM from_clause]\n\
\t[WHERE qual]\n\
......@@ -283,7 +283,7 @@ static struct _helpStruct QL_HELP[] = {
{"lock",
"exclusive lock a table inside a transaction",
"\
\tLOCK [TABLE] class_name \n\
\tLOCK [TABLE] tablename \n\
\t[IN [ROW|ACCESS] [SHARE|EXCLUSIVE] | [SHARE ROW EXCLUSIVE] MODE];"},
{"move",
"move an cursor position",
......@@ -311,15 +311,15 @@ TIMEZONE|XACTISOLEVEL|CLIENT_ENCODING|SERVER_ENCODING"},
{"select",
"retrieve tuples",
"\
\tSELECT [DISTINCT [ON attrN]] expr1 [AS attr1], ...exprN\n\
\t[INTO [TEMP] [TABLE] class_name]\n\
\tSELECT [DISTINCT [ON colnameN]] expr1 [AS colname1], ...exprN\n\
\t[INTO [TEMP] [TABLE] tablename]\n\
\t[FROM from_list]\n\
\t[WHERE qual]\n\
\t[GROUP BY group_list]\n\
\t[HAVING having_clause]\n\
\t[ { UNION [ALL] | INTERSECT | EXCEPT } SELECT ...]\n\
\t[ORDER BY attr1 [ASC|DESC] [USING op1], ...attrN ]\n\
\t[FOR UPDATE [OF class_name...]]\n\
\t[ORDER BY colname1 [ASC|DESC] [USING op1], ...colnameN ]\n\
\t[FOR UPDATE [OF tablename...]]\n\
\t[LIMIT count [OFFSET|, count]];"},
{"set",
"set run-time environment",
......@@ -346,10 +346,14 @@ TIMEZONE|XACTISOLEVEL|CLIENT_ENCODING|SERVER_ENCODING"},
"stop listening for notification on a condition name",
"\
\tUNLISTEN name|\"non-name string\"|\"*\""},
{"truncate",
"quickly removes all rows from a table",
"\
\tTRUNCATE TABLE tablename"},
{"update",
"update tuples",
"\
\tUPDATE class_name SET attr1 = expr1, ...attrN = exprN\n\
\tUPDATE tablename SET colname1 = expr1, ...colnameN = exprN\n\
\t[FROM from_clause]\n\
\t[WHERE qual];"},
{"vacuum",
......@@ -357,7 +361,7 @@ TIMEZONE|XACTISOLEVEL|CLIENT_ENCODING|SERVER_ENCODING"},
"\
\tVACUUM [VERBOSE] [ANALYZE] [table]\n\
\tor\n\
\tVACUUM [VERBOSE] ANALYZE [table [(attr1, ...attrN)]];"},
\tVACUUM [VERBOSE] ANALYZE [table [(colname1, ...colnameN)]];"},
{NULL, NULL, NULL} /* important to keep a NULL terminator
* here! */
};
src/include/catalog/heap.h
View file @ e7cad7b0
......@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: heap.h,v 1.20 1999/07/15 23:03:41 momjian Exp $
* $Id: heap.h,v 1.21 1999/09/23 17:03:10 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -23,6 +23,7 @@ extern Oid heap_create_with_catalog(char *relname,
TupleDesc tupdesc, char relkind, bool istemp);
extern void heap_destroy_with_catalog(char *relname);
extern void heap_truncate(char *relname);
extern void heap_destroy(Relation rel);
extern void InitNoNameRelList(void);
......
src/include/commands/creatinh.h
View file @ e7cad7b0
......@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: creatinh.h,v 1.9 1999/02/13 23:21:18 momjian Exp $
* $Id: creatinh.h,v 1.10 1999/09/23 17:03:16 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -17,5 +17,6 @@
extern void DefineRelation(CreateStmt *stmt, char relkind);
extern void RemoveRelation(char *name);
extern void TruncateRelation(char *name);
#endif /* CREATINH_H */
src/include/nodes/nodes.h
View file @ e7cad7b0
......@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: nodes.h,v 1.51 1999/08/16 02:17:39 tgl Exp $
* $Id: nodes.h,v 1.52 1999/09/23 17:03:21 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -151,6 +151,7 @@ typedef enum NodeTag
T_VersionStmt,
T_DefineStmt,
T_DestroyStmt,
T_TruncateStmt,
T_ExtendStmt,
T_FetchStmt,
T_IndexStmt,
......
src/include/nodes/parsenodes.h
View file @ e7cad7b0
......@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: parsenodes.h,v 1.78 1999/08/21 03:49:09 tgl Exp $
* $Id: parsenodes.h,v 1.79 1999/09/23 17:03:22 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -282,6 +282,16 @@ typedef struct DestroyStmt
bool sequence;
} DestroyStmt;
/* ----------------------
* Truncate Table Statement
* ----------------------
*/
typedef struct TruncateStmt
{
NodeTag type;
char *relName; /* relation to be truncated */
} TruncateStmt;
/* ----------------------
* Extend Index Statement
* ----------------------
......
src/include/storage/bufmgr.h
View file @ e7cad7b0
......@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: bufmgr.h,v 1.29 1999/07/17 20:18:33 momjian Exp $
* $Id: bufmgr.h,v 1.30 1999/09/23 17:03:27 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -161,6 +161,7 @@ extern void BufferRefCountReset(int *refcountsave);
extern void BufferRefCountRestore(int *refcountsave);
extern int SetBufferWriteMode(int mode);
extern void SetBufferCommitInfoNeedsSave(Buffer buffer);
extern int BlowawayRelationBuffers(Relation rel, BlockNumber block);
extern void UnlockBuffers(void);
extern void LockBuffer(Buffer buffer, int mode);
......
src/include/utils/portal.h
View file @ e7cad7b0
......@@ -6,7 +6,7 @@
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: portal.h,v 1.18 1999/09/09 16:25:23 tgl Exp $
* $Id: portal.h,v 1.19 1999/09/23 17:03:33 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -60,6 +60,7 @@ struct PortalD
* Special portals (well, their names anyway)
*/
#define VACPNAME "<vacuum>"
#define TRUNCPNAME "<truncate>"
extern bool PortalNameIsSpecial(char *pname);
extern void AtEOXact_portals(void);
......
src/tools/pgindent/pgindent
View file @ e7cad7b0
......@@ -163,6 +163,7 @@ do
-TDepth \
-TDestReceiver \
-TDestroyStmt \
-TTruncateStmt \
-TDestroydbStmt \
-TDisplay \
-TDl_info \
......
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