update to support the new OVERLAY() function.

changed some commented out messages to use the Driver.debug and fixed first to read the underlying data into rowbuffer

(ODBC support has not been committed yet. left for Hiroshi...)

implementation didn't work for Sort nodes associated with Append plans.

applied when the select is a UNION (or other set-operation).

An alternative route to a fix would be to leave analyze.c alone and
change plan_set_operations in prepunion.c to take column names from
the topmost targetlist.  But I am not sure that would work in all
cases.  This patch seems the minimum-risk fix.

> 	o Allow multi-threaded use of SQLCA

2) Fix a bug *passowrd prompt in case of md5 authentication*.
3) Improve the DSN setup dialog.

> * -Add SIMILAR TO to allow character classes, 'pg_[a-c]%'

Implement SQL99 SIMILAR TO as a synonym for our existing operator "~".
Implement SQL99 regular expression SUBSTRING(string FROM pat FOR escape).
 Extend the definition to make the FOR clause optional.
 Define textregexsubstr() to actually implement this feature.
Update the regression test to include these new string features.
 All tests pass.
Rename the regular expression support routines from "pg95_xxx" to "pg_xxx".
Define CREATE CHARACTER SET in the parser per SQL99. No implementation yet.

Implement SQL99 SIMILAR TO as a synonym for our existing operator "~".
Implement SQL99 regular expression SUBSTRING(string FROM pat FOR escape).
 Extend the definition to make the FOR clause optional.
 Define textregexsubstr() to actually implement this feature.
Update the regression test to include these new string features.
 All tests pass.
Rename the regular expression support routines from "pg95_xxx" to "pg_xxx".
Define CREATE CHARACTER SET in the parser per SQL99. No implementation yet.

> Changes to avoid collisions with WIN32 & MFC names...
> 1.  Renamed:
>       a.  PROC => PGPROC
>       b.  GetUserName() => GetUserNameFromId()
>       c.  GetCurrentTime() => GetCurrentDateTime()
>       d.  IGNORE => IGNORE_DTF in include/utils/datetime.h & utils/adt/datetim
>
> 2.  Added _P to some lex/yacc tokens:
>       CONST, CHAR, DELETE, FLOAT, GROUP, IN, OUT

Jan

  Allows you to set the loglevel at runtime by adding ?loglevel=X to the connection URL, where 1 = INFO and 2 = DEBUG.
  Automatically turns on logging by calling DriverManager.setPrintWriter(new PrintWriter(System.out)) if one is not already set.
Adds a Driver.info() message that prints out the version number
Adds member variables logDebug and logInfo that can be checked before making logging methods calls
Adds a build number to the version number string.  This build number will need to be manually incremented when we see fit.

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Modified Files:
 	org/postgresql/Connection.java org/postgresql/Driver.java.in
 	org/postgresql/fastpath/Fastpath.java
 	org/postgresql/jdbc1/DatabaseMetaData.java
 	org/postgresql/jdbc2/Connection.java
 	org/postgresql/jdbc2/DatabaseMetaData.java
 	org/postgresql/largeobject/LargeObjectManager.java
 	org/postgresql/util/PSQLException.java
 	org/postgresql/util/Serialize.java
----------------------------------------------------------------------