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Add support for the CASE statement in the rewrite handling.

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Allows (at least some) rules and views.
Still some trouble (crashes) with target CASE columns spanning tables,
 but lots now works.
This commit is contained in:
Thomas G. Lockhart
1998-12-14 00:02:17 +00:00
parent 2b189aa953
commit 4140c2f30e
6 changed files with 250 additions and 13 deletions
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70
src/backend/rewrite/rewriteManip.c
View File

@ -6,7 +6,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.22 1998/10/21 16:21:26 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteManip.c,v 1.23 1998/12/14 00:02:17 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -191,6 +191,38 @@ OffsetVarNodes(Node *node, int offset, int sublevels_up)
}
break;
case T_CaseExpr:
{
CaseExpr *exp = (CaseExpr *)node;
OffsetVarNodes(
(Node *)(exp->args),
offset,
sublevels_up);
OffsetVarNodes(
(Node *)(exp->defresult),
offset,
sublevels_up);
}
break;
case T_CaseWhen:
{
CaseWhen *exp = (CaseWhen *)node;
OffsetVarNodes(
(Node *)(exp->expr),
offset,
sublevels_up);
OffsetVarNodes(
(Node *)(exp->result),
offset,
sublevels_up);
}
break;
default:
elog(NOTICE, "unknown node tag %d in OffsetVarNodes()", nodeTag(node));
elog(NOTICE, "Node is: %s", nodeToString(node));
@ -377,6 +409,42 @@ ChangeVarNodes(Node *node, int rt_index, int new_index, int sublevels_up)
}
break;
case T_CaseExpr:
{
CaseExpr *exp = (CaseExpr *)node;
ChangeVarNodes(
(Node *)(exp->args),
rt_index,
new_index,
sublevels_up);
ChangeVarNodes(
(Node *)(exp->defresult),
rt_index,
new_index,
sublevels_up);
}
break;
case T_CaseWhen:
{
CaseWhen *exp = (CaseWhen *)node;
ChangeVarNodes(
(Node *)(exp->expr),
rt_index,
new_index,
sublevels_up);
ChangeVarNodes(
(Node *)(exp->result),
rt_index,
new_index,
sublevels_up);
}
break;
default:
elog(NOTICE, "unknown node tag %d in ChangeVarNodes()", nodeTag(node));
elog(NOTICE, "Node is: %s", nodeToString(node));