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Add Oracle-compatible GREATEST and LEAST functions. Pavel Stehule

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This commit is contained in:
Tom Lane
2005-06-26 22:05:42 +00:00
parent d395aecffa
commit 943b396245
17 changed files with 409 additions and 36 deletions
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14
src/backend/parser/parse_target.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.136 2005/06/05 00:38:10 tgl Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_target.c,v 1.137 2005/06/26 22:05:40 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1123,6 +1123,18 @@ FigureColnameInternal(Node *node, char **name)
/* make coalesce() act like a regular function */
*name = "coalesce";
return 2;
case T_MinMaxExpr:
/* make greatest/least act like a regular function */
switch (((MinMaxExpr*) node)->op)
{
case IS_GREATEST:
*name = "greatest";
return 2;
case IS_LEAST:
*name = "least";
return 2;
}
break;
default:
break;
}