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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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20
src/backend/nodes/copyfuncs.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.308 2005/06/22 21:14:29 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.309 2005/06/26 22:05:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1047,6 +1047,21 @@ _copyCoalesceExpr(CoalesceExpr *from)
return newnode;
}
/*
* _copyMinMaxExpr
*/
static MinMaxExpr *
_copyMinMaxExpr(MinMaxExpr *from)
{
MinMaxExpr *newnode = makeNode(MinMaxExpr);
COPY_SCALAR_FIELD(minmaxtype);
COPY_SCALAR_FIELD(op);
COPY_NODE_FIELD(args);
return newnode;
}
/*
* _copyNullIfExpr (same as OpExpr)
*/
@ -2805,6 +2820,9 @@ copyObject(void *from)
case T_CoalesceExpr:
retval = _copyCoalesceExpr(from);
break;
case T_MinMaxExpr:
retval = _copyMinMaxExpr(from);
break;
case T_NullIfExpr:
retval = _copyNullIfExpr(from);
break;