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Allow a string argument to the EXTRACT() function. 

This is an extension to the SQL9x standard, but is consistant with usage
 of the underlying date_part() function used to implement it.
 Example: EXTRACT('YEAR',...)
No impact on regression tests.
This commit is contained in:
Thomas G. Lockhart 2001-05-01 01:36:10 +00:00
parent 892d46e7d0
commit d63571a7f4
1 changed files with 7 additions and 2 deletions
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9
src/backend/parser/gram.y
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@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.221 2001/02/18 18:06:10 petere Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.222 2001/05/01 01:36:10 thomas Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -4986,8 +4986,13 @@ extract_list: extract_arg FROM a_expr
{ $$ = NIL; }
;
/* Allow delimited string SCONST in extract_arg as an SQL extension.
* - thomas 2001-04-12
*/
extract_arg: datetime { $$ = $1; }
| IDENT { $$ = $1; }
| SCONST { $$ = $1; }
| IDENT { $$ = $1; }
| TIMEZONE_HOUR { $$ = "tz_hour"; }
| TIMEZONE_MINUTE { $$ = "tz_minute"; }
;