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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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94
src/backend/rewrite/rewriteHandler.c
View File

@ -6,7 +6,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.26 1998/12/04 15:34:36 thomas Exp $
* $Header: /cvsroot/pgsql/src/backend/rewrite/rewriteHandler.c,v 1.27 1998/12/14 00:02:16 thomas Exp $
*
*-------------------------------------------------------------------------
*/
@ -1457,6 +1457,34 @@ apply_RIR_adjust_sublevel(Node *node, int sublevels_up)
}
break;
case T_CaseExpr:
{
CaseExpr *exp = (CaseExpr *)node;
apply_RIR_adjust_sublevel(
(Node *)(exp->args),
sublevels_up);
apply_RIR_adjust_sublevel(
(Node *)(exp->defresult),
sublevels_up);
}
break;
case T_CaseWhen:
{
CaseWhen *exp = (CaseWhen *)node;
apply_RIR_adjust_sublevel(
(Node *)(exp->expr),
sublevels_up);
apply_RIR_adjust_sublevel(
(Node *)(exp->result),
sublevels_up);
}
break;
default:
elog(NOTICE, "unknown node tag %d in attribute_used()", nodeTag(node));
elog(NOTICE, "Node is: %s", nodeToString(node));
@ -1691,6 +1719,50 @@ apply_RIR_view(Node **nodePtr, int rt_index, RangeTblEntry *rte, List *tlist, in
}
break;
case T_CaseExpr:
{
CaseExpr *exp = (CaseExpr *)node;
apply_RIR_view(
(Node **)(&(exp->args)),
rt_index,
rte,
tlist,
modified,
sublevels_up);
apply_RIR_view(
(Node **)(&(exp->defresult)),
rt_index,
rte,
tlist,
modified,
sublevels_up);
}
break;
case T_CaseWhen:
{
CaseWhen *exp = (CaseWhen *)node;
apply_RIR_view(
(Node **)(&(exp->expr)),
rt_index,
rte,
tlist,
modified,
sublevels_up);
apply_RIR_view(
(Node **)(&(exp->result)),
rt_index,
rte,
tlist,
modified,
sublevels_up);
}
break;
default:
elog(NOTICE, "unknown node tag %d in apply_RIR_view()", nodeTag(node));
elog(NOTICE, "Node is: %s", nodeToString(node));
@ -1885,7 +1957,27 @@ fireRIRonSubselect(Node *node)
break;
case T_CaseExpr:
{
CaseExpr *exp = (CaseExpr *)node;
fireRIRonSubselect(
(Node *)(exp->args));
fireRIRonSubselect(
(Node *)(exp->defresult));
}
break;
case T_CaseWhen:
{
CaseWhen *exp = (CaseWhen *)node;
fireRIRonSubselect(
(Node *)(exp->expr));
fireRIRonSubselect(
(Node *)(exp->result));
}
break;
case T_Query: