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Implement CASE expression.

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This commit is contained in:
Thomas G. Lockhart
1998-12-04 15:34:49 +00:00
parent 19740e2fff
commit bedd04a551
17 changed files with 779 additions and 110 deletions
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49
src/backend/nodes/copyfuncs.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.50 1998/11/22 10:48:38 vadim Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.51 1998/12/04 15:33:33 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -943,6 +943,47 @@ _copySubLink(SubLink *from)
return newnode;
}
/* ----------------
* _copyCaseExpr
* ----------------
*/
static CaseExpr *
_copyCaseExpr(CaseExpr *from)
{
CaseExpr *newnode = makeNode(CaseExpr);
/* ----------------
* copy remainder of node
* ----------------
*/
newnode->casetype = from->casetype;
Node_Copy(from, newnode, arg);
Node_Copy(from, newnode, args);
Node_Copy(from, newnode, defresult);
return newnode;
}
/* ----------------
* _copyCaseWhen
* ----------------
*/
static CaseWhen *
_copyCaseWhen(CaseWhen *from)
{
CaseWhen *newnode = makeNode(CaseWhen);
/* ----------------
* copy remainder of node
* ----------------
*/
Node_Copy(from, newnode, expr);
Node_Copy(from, newnode, result);
return newnode;
}
static Array *
_copyArray(Array *from)
{
@ -1734,6 +1775,12 @@ copyObject(void *from)
case T_SubLink:
retval = _copySubLink(from);
break;
case T_CaseExpr:
retval = _copyCaseExpr(from);
break;
case T_CaseWhen:
retval = _copyCaseWhen(from);
break;
/*
* RELATION NODES