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Add a new GUC variable called "IntervalStyle" that decouples interval output

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from DateStyle, and create a new interval style that produces output matching
the SQL standard (at least for interval values that fall within the standard's
restrictions).  IntervalStyle is also used to resolve the conflict between the
standard and traditional Postgres rules for interpreting negative interval
input.

Ron Mayer
This commit is contained in:
Tom Lane
2008-11-09 00:28:35 +00:00
parent eec501c4f7
commit df7641e25a
18 changed files with 540 additions and 143 deletions
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14
src/include/miscadmin.h
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@ -13,7 +13,7 @@
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.203 2008/10/09 17:24:05 alvherre Exp $
* $PostgreSQL: pgsql/src/include/miscadmin.h,v 1.204 2008/11/09 00:28:35 tgl Exp $
*
* NOTES
* some of the information in this file should be moved to other files.
@ -191,6 +191,18 @@ extern PGDLLIMPORT Oid MyDatabaseTableSpace;
extern int DateStyle;
extern int DateOrder;
/*
* IntervalStyles
* INTSTYLE_POSTGRES Like Postgres < 8.4 when DateStyle = 'iso'
* INTSTYLE_POSTGRES_VERBOSE Like Postgres < 8.4 when DateStyle != 'iso'
* INTSTYLE_SQL_STANDARD SQL standard interval literals
*/
#define INTSTYLE_POSTGRES 0
#define INTSTYLE_POSTGRES_VERBOSE 1
#define INTSTYLE_SQL_STANDARD 2
extern int IntervalStyle;
/*
* HasCTZSet is true if user has set timezone as a numeric offset from UTC.