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Rule deparser didn't handle unary operators correctly.

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This commit is contained in:
Tom Lane 1999-09-02 03:04:04 +00:00
parent 68c323483c
commit 51f62ea45c
1 changed files with 74 additions and 22 deletions

96
src/backend/utils/adt/ruleutils.c

@ -3,7 +3,7 @@
* out of it's tuple
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.24 1999/08/28 03:59:05 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.25 1999/09/02 03:04:04 tgl Exp $
*
* This software is copyrighted by Jan Wieck - Hamburg.
*
@ -43,8 +43,9 @@
#include "optimizer/clauses.h"
#include "optimizer/tlist.h"
#include "utils/lsyscache.h"
#include "catalog/pg_shadow.h"
#include "catalog/pg_index.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_shadow.h"
#define BUFSIZE 8192
@ -1270,6 +1271,7 @@ get_rule_expr(QryHier *qh, int rt_index, Node *node, bool varprefix)
case T_Expr:
{
Expr *expr = (Expr *) node;
List *args = expr->args;
/* ----------
* Expr nodes have to be handled a bit detailed
@ -1279,15 +1281,56 @@ get_rule_expr(QryHier *qh, int rt_index, Node *node, bool varprefix)
{
case OP_EXPR:
strcat(buf, "(");
strcat(buf, get_rule_expr(qh, rt_index,
(Node *) get_leftop(expr),
varprefix));
strcat(buf, " ");
strcat(buf, get_opname(((Oper *) expr->oper)->opno));
strcat(buf, " ");
strcat(buf, get_rule_expr(qh, rt_index,
(Node *) get_rightop(expr),
varprefix));
if (length(args) == 2)
{
/* binary operator */
strcat(buf,
get_rule_expr(qh, rt_index,
(Node *) lfirst(args),
varprefix));
strcat(buf, " ");
strcat(buf,
get_opname(((Oper *) expr->oper)->opno));
strcat(buf, " ");
strcat(buf,
get_rule_expr(qh, rt_index,
(Node *) lsecond(args),
varprefix));
}
else
{
/* unary operator --- but which side? */
Oid opno = ((Oper *) expr->oper)->opno;
HeapTuple tp;
Form_pg_operator optup;
tp = SearchSysCacheTuple(OPROID,
ObjectIdGetDatum(opno),
0, 0, 0);
Assert(HeapTupleIsValid(tp));
optup = (Form_pg_operator) GETSTRUCT(tp);
switch (optup->oprkind)
{
case 'l':
strcat(buf, get_opname(opno));
strcat(buf, " ");
strcat(buf,
get_rule_expr(qh, rt_index,
(Node *) lfirst(args),
varprefix));
break;
case 'r':
strcat(buf,
get_rule_expr(qh, rt_index,
(Node *) lfirst(args),
varprefix));
strcat(buf, " ");
strcat(buf, get_opname(opno));
break;
default:
elog(ERROR, "get_rule_expr: bogus oprkind");
}
}
strcat(buf, ")");
return pstrdup(buf);
break;
@ -1295,12 +1338,18 @@ get_rule_expr(QryHier *qh, int rt_index, Node *node, bool varprefix)
case OR_EXPR:
strcat(buf, "(");
strcat(buf, get_rule_expr(qh, rt_index,
(Node *) get_leftop(expr),
varprefix));
strcat(buf, " OR ");
strcat(buf, get_rule_expr(qh, rt_index,
(Node *) get_rightop(expr),
(Node *) lfirst(args),
varprefix));
/* It's not clear that we can ever see N-argument
* OR/AND clauses here, but might as well cope...
*/
while ((args = lnext(args)) != NIL)
{
strcat(buf, " OR ");
strcat(buf, get_rule_expr(qh, rt_index,
(Node *) lfirst(args),
varprefix));
}
strcat(buf, ")");
return pstrdup(buf);
break;
@ -1308,12 +1357,15 @@ get_rule_expr(QryHier *qh, int rt_index, Node *node, bool varprefix)
case AND_EXPR:
strcat(buf, "(");
strcat(buf, get_rule_expr(qh, rt_index,
(Node *) get_leftop(expr),
varprefix));
strcat(buf, " AND ");
strcat(buf, get_rule_expr(qh, rt_index,
(Node *) get_rightop(expr),
(Node *) lfirst(args),
varprefix));
while ((args = lnext(args)) != NIL)
{
strcat(buf, " AND ");
strcat(buf, get_rule_expr(qh, rt_index,
(Node *) lfirst(args),
varprefix));
}
strcat(buf, ")");
return pstrdup(buf);
break;
@ -1335,7 +1387,7 @@ get_rule_expr(QryHier *qh, int rt_index, Node *node, bool varprefix)
default:
printf("\n%s\n", nodeToString(node));
elog(ERROR, "Expr type not supported");
elog(ERROR, "get_rule_expr: expr type not supported");
}
}
break;