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Finished the Between patch Christopher started.

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Implements between (symmetric / asymmetric) as a node.

Executes the left or right expression once, makes a Const out of the
resulting Datum and executes the >=, <= portions out of the Const sets.

Of course, the parser does a fair amount of preparatory work for this to
happen.

Rod Taylor
This commit is contained in:
Bruce Momjian
2002-07-18 04:41:46 +00:00
parent 7ea5f1d7f1
commit 3e22406ec6
15 changed files with 619 additions and 35 deletions
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31
src/backend/nodes/copyfuncs.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.194 2002/07/16 22:12:19 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/copyfuncs.c,v 1.195 2002/07/18 04:41:44 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -999,6 +999,32 @@ _copyCaseExpr(CaseExpr *from)
return newnode;
}
/* ----------------
* _copyBetweenExpr
* ----------------
*/
static BetweenExpr *
_copyBetweenExpr(BetweenExpr *from)
{
BetweenExpr *newnode = makeNode(BetweenExpr);
/*
* copy remainder of node
*/
Node_Copy(from, newnode, expr);
Node_Copy(from, newnode, lexpr);
Node_Copy(from, newnode, rexpr);
Node_Copy(from, newnode, lthan);
Node_Copy(from, newnode, gthan);
newnode->symmetric = from->symmetric;
newnode->not = from->not;
newnode->typeId = from->typeId;
newnode->typeLen = from->typeLen;
newnode->typeByVal = from->typeByVal;
return newnode;
}
/* ----------------
* _copyCaseWhen
* ----------------
@ -3052,6 +3078,9 @@ copyObject(void *from)
case T_CaseExpr:
retval = _copyCaseExpr(from);
break;
case T_BetweenExpr:
retval = _copyBetweenExpr(from);
break;
case T_CaseWhen:
retval = _copyCaseWhen(from);
break;