+ ExecConstraints()
This commit is contained in:
Vadim B. Mikheev
parent
faebf2f8a2
commit
d40885cc40
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@ -26,7 +26,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.18 1997/08/22 03:12:16 vadim Exp $
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* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.19 1997/08/22 14:28:20 vadim Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -73,8 +73,6 @@ static void ExecDelete(TupleTableSlot *slot, ItemPointer tupleid,
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static void ExecReplace(TupleTableSlot *slot, ItemPointer tupleid,
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EState *estate, Query *parseTree);
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static HeapTuple ExecAttrDefault (Relation rel, HeapTuple tuple);
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/* end of local decls */
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#ifdef QUERY_LIMIT
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@ -930,29 +928,15 @@ ExecAppend(TupleTableSlot *slot,
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if ( resultRelationDesc->rd_att->constr )
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{
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if ( resultRelationDesc->rd_att->constr->num_defval > 0 )
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HeapTuple newtuple;
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newtuple = ExecConstraints ("ExecAppend", resultRelationDesc, tuple);
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if ( newtuple != tuple ) /* modified by DEFAULT */
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{
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HeapTuple newtuple;
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newtuple = ExecAttrDefault (resultRelationDesc, tuple);
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if ( newtuple != tuple )
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{
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Assert ( slot->ttc_shouldFree );
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slot->val = tuple = newtuple;
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}
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}
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if ( resultRelationDesc->rd_att->constr->has_not_null )
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{
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int attrChk;
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for (attrChk = 1; attrChk <= resultRelationDesc->rd_att->natts; attrChk++)
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{
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if (resultRelationDesc->rd_att->attrs[attrChk-1]->attnotnull && heap_attisnull(tuple,attrChk))
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elog(WARN,"ExecAppend: Fail to add null value in not null attribute %s",
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resultRelationDesc->rd_att->attrs[attrChk-1]->attname.data);
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}
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Assert ( slot->ttc_shouldFree );
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pfree (tuple);
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slot->val = tuple = newtuple;
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}
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}
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@ -1081,15 +1065,19 @@ ExecReplace(TupleTableSlot *slot,
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* ----------------
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*/
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if (resultRelationDesc->rd_att->constr && resultRelationDesc->rd_att->constr->has_not_null)
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{
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int attrChk;
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for (attrChk = 1; attrChk <= resultRelationDesc->rd_att->natts; attrChk++) {
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if (resultRelationDesc->rd_att->attrs[attrChk-1]->attnotnull && heap_attisnull(tuple,attrChk))
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elog(WARN,"ExecReplace: Fail to update null value in not null attribute %s",
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resultRelationDesc->rd_att->attrs[attrChk-1]->attname.data);
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}
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}
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if ( resultRelationDesc->rd_att->constr )
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{
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HeapTuple newtuple;
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newtuple = ExecConstraints ("ExecReplace", resultRelationDesc, tuple);
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if ( newtuple != tuple ) /* modified by DEFAULT */
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{
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Assert ( slot->ttc_shouldFree );
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pfree (tuple);
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slot->val = tuple = newtuple;
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}
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}
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/* ----------------
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* replace the heap tuple
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@ -1140,7 +1128,8 @@ ExecAttrDefault (Relation rel, HeapTuple tuple)
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{
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int ndef = rel->rd_att->constr->num_defval;
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AttrDefault *attrdef = rel->rd_att->constr->defval;
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ExprContext *econtext = makeNode(ExprContext);
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ExprContext *econtext = makeNode (ExprContext);
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HeapTuple newtuple;
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Node *expr;
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bool isnull;
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bool isdone;
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@ -1150,21 +1139,23 @@ ExecAttrDefault (Relation rel, HeapTuple tuple)
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char *repl = NULL;
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int i;
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econtext->ecxt_scantuple = NULL; /* scan tuple slot */
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econtext->ecxt_innertuple = NULL; /* inner tuple slot */
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econtext->ecxt_outertuple = NULL; /* outer tuple slot */
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econtext->ecxt_relation = NULL; /* relation */
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econtext->ecxt_relid = 0; /* relid */
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econtext->ecxt_param_list_info = NULL; /* param list info */
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econtext->ecxt_range_table = NULL; /* range table */
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for (i = 0; i < ndef; i++)
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{
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if ( !heap_attisnull (tuple, attrdef[i].adnum) )
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continue;
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expr = (Node*) stringToNode (attrdef[i].adbin);
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econtext->ecxt_scantuple = NULL; /* scan tuple slot */
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econtext->ecxt_innertuple = NULL; /* inner tuple slot */
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econtext->ecxt_outertuple = NULL; /* outer tuple slot */
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econtext->ecxt_relation = NULL; /* relation */
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econtext->ecxt_relid = 0; /* relid */
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econtext->ecxt_param_list_info = NULL; /* param list info */
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econtext->ecxt_range_table = NULL; /* range table */
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val = ExecEvalExpr (expr, econtext, &isnull, &isdone);
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pfree (expr);
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if ( isnull )
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continue;
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@ -1182,9 +1173,108 @@ ExecAttrDefault (Relation rel, HeapTuple tuple)
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}
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pfree (econtext);
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if ( repl == NULL )
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return (tuple);
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return (heap_modifytuple (tuple, InvalidBuffer, rel, replValue, replNull, repl));
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newtuple = heap_modifytuple (tuple, InvalidBuffer, rel, replValue, replNull, repl);
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pfree (repl);
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pfree (replNull);
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pfree (replValue);
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return (newtuple);
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}
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static char *
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ExecRelCheck (Relation rel, HeapTuple tuple)
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{
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int ncheck = rel->rd_att->constr->num_check;
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ConstrCheck *check = rel->rd_att->constr->check;
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ExprContext *econtext = makeNode (ExprContext);
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TupleTableSlot *slot = makeNode (TupleTableSlot);
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RangeTblEntry *rte = makeNode (RangeTblEntry);
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List *rtlist;
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List *qual;
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bool res;
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int i;
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slot->val = tuple;
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slot->ttc_shouldFree = false;
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slot->ttc_descIsNew = true;
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slot->ttc_tupleDescriptor = rel->rd_att;
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slot->ttc_buffer = InvalidBuffer;
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slot->ttc_whichplan = -1;
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rte->relname = nameout (&(rel->rd_rel->relname));
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rte->timeRange = NULL;
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rte->refname = rte->relname;
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rte->relid = rel->rd_id;
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rte->inh = false;
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rte->archive = false;
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rte->inFromCl = true;
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rte->timeQual = NULL;
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rtlist = lcons (rte, NIL);
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econtext->ecxt_scantuple = slot; /* scan tuple slot */
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econtext->ecxt_innertuple = NULL; /* inner tuple slot */
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econtext->ecxt_outertuple = NULL; /* outer tuple slot */
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econtext->ecxt_relation = rel; /* relation */
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econtext->ecxt_relid = 0; /* relid */
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econtext->ecxt_param_list_info = NULL; /* param list info */
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econtext->ecxt_range_table = rtlist; /* range table */
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for (i = 0; i < ncheck; i++)
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{
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qual = (List*) stringToNode (check[i].ccbin);
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res = ExecQual (qual, econtext);
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pfree (qual);
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if ( !res )
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return (check[i].ccname);
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}
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pfree (slot);
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pfree (rte->relname);
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pfree (rte);
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pfree (rtlist);
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pfree (econtext);
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return ((char *) NULL);
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}
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HeapTuple
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ExecConstraints (char *caller, Relation rel, HeapTuple tuple)
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{
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HeapTuple newtuple = tuple;
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Assert ( rel->rd_att->constr );
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if ( rel->rd_att->constr->num_defval > 0 )
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newtuple = tuple = ExecAttrDefault (rel, tuple);
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if ( rel->rd_att->constr->has_not_null )
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{
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int attrChk;
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for (attrChk = 1; attrChk <= rel->rd_att->natts; attrChk++)
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{
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if (rel->rd_att->attrs[attrChk-1]->attnotnull && heap_attisnull (tuple,attrChk))
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elog(WARN,"%s: Fail to add null value in not null attribute %s",
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caller, rel->rd_att->attrs[attrChk-1]->attname.data);
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}
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}
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if ( rel->rd_att->constr->num_check > 0 )
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{
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char *failed;
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if ( ( failed = ExecRelCheck (rel, tuple) ) != NULL )
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elog(WARN,"%s: rejected due to CHECK constraint %s", caller, failed);
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}
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return (newtuple);
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}
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