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-rw-r--r--src/backend/executor/execQual.c40
1 files changed, 6 insertions, 34 deletions
diff --git a/src/backend/executor/execQual.c b/src/backend/executor/execQual.c
index cc165006f5c..53ddc658197 100644
--- a/src/backend/executor/execQual.c
+++ b/src/backend/executor/execQual.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.222 2007/09/06 17:31:58 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.223 2007/10/24 18:37:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -3694,45 +3694,17 @@ ExecEvalArrayCoerceExpr(ArrayCoerceExprState *astate,
/* ----------------------------------------------------------------
* ExecEvalCurrentOfExpr
*
- * Normally, the planner will convert CURRENT OF into a TidScan qualification,
- * but we have plain execQual support in case it doesn't.
+ * The planner must convert CURRENT OF into a TidScan qualification.
+ * So, we have to be able to do ExecInitExpr on a CurrentOfExpr,
+ * but we shouldn't ever actually execute it.
* ----------------------------------------------------------------
*/
static Datum
ExecEvalCurrentOfExpr(ExprState *exprstate, ExprContext *econtext,
bool *isNull, ExprDoneCond *isDone)
{
- CurrentOfExpr *cexpr = (CurrentOfExpr *) exprstate->expr;
- bool result;
- bool lisnull;
- Oid tableoid;
- ItemPointer tuple_tid;
- ItemPointerData cursor_tid;
-
- if (isDone)
- *isDone = ExprSingleResult;
- *isNull = false;
-
- Assert(cexpr->cvarno != INNER);
- Assert(cexpr->cvarno != OUTER);
- Assert(!TupIsNull(econtext->ecxt_scantuple));
- /* Use slot_getattr to catch any possible mistakes */
- tableoid = DatumGetObjectId(slot_getattr(econtext->ecxt_scantuple,
- TableOidAttributeNumber,
- &lisnull));
- Assert(!lisnull);
- tuple_tid = (ItemPointer)
- DatumGetPointer(slot_getattr(econtext->ecxt_scantuple,
- SelfItemPointerAttributeNumber,
- &lisnull));
- Assert(!lisnull);
-
- if (execCurrentOf(cexpr, econtext, tableoid, &cursor_tid))
- result = ItemPointerEquals(&cursor_tid, tuple_tid);
- else
- result = false;
-
- return BoolGetDatum(result);
+ elog(ERROR, "CURRENT OF cannot be executed");
+ return 0; /* keep compiler quiet */
}