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DEFAULT handling

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Use  for 'selct .. into ..' copy of TupleDesc (without constraints)
#ifdef NOT_USED for resetVarAttrLenForCreateTable (just free tupdesc copy)
This commit is contained in:
Vadim B. Mikheev 1997-08-22 03:12:19 +00:00
parent b5b3e03e34
commit ed2c54b240
2 changed files with 100 additions and 16 deletions
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96
src/backend/executor/execMain.c
View File

@ -26,7 +26,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.17 1997/08/19 21:31:00 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execMain.c,v 1.18 1997/08/22 03:12:16 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -73,6 +73,8 @@ static void ExecDelete(TupleTableSlot *slot, ItemPointer tupleid,
static void ExecReplace(TupleTableSlot *slot, ItemPointer tupleid,
EState *estate, Query *parseTree);
static HeapTuple ExecAttrDefault (Relation rel, HeapTuple tuple);
/* end of local decls */
#ifdef QUERY_LIMIT
@ -513,6 +515,7 @@ InitPlan(CmdType operation, Query *parseTree, Plan *plan, EState *estate)
char *intoName;
char archiveMode;
Oid intoRelationId;
TupleDesc tupdesc;
if (!parseTree->isPortal) {
/*
@ -530,16 +533,23 @@ InitPlan(CmdType operation, Query *parseTree, Plan *plan, EState *estate)
intoName = parseTree->into;
archiveMode = 'n';
/*
* have to copy tupType to get rid of constraints
*/
tupdesc = CreateTupleDescCopy (tupType);
/* fixup to prevent zero-length columns in create */
setVarAttrLenForCreateTable(tupType, targetList, rangeTable);
setVarAttrLenForCreateTable(tupdesc, targetList, rangeTable);
intoRelationId = heap_create(intoName,
intoName, /* not used */
archiveMode,
DEFAULT_SMGR,
tupType);
resetVarAttrLenForCreateTable(tupType);
tupdesc);
#ifdef NOT_USED /* it's copy ... */
resetVarAttrLenForCreateTable(tupdesc);
#endif
FreeTupleDesc (tupdesc);
/* ----------------
* XXX rather than having to call setheapoverride(true)
@ -918,15 +928,33 @@ ExecAppend(TupleTableSlot *slot,
* ----------------
*/
if (resultRelationDesc->rd_att->constr && resultRelationDesc->rd_att->constr->has_not_null)
if ( resultRelationDesc->rd_att->constr )
{
if ( resultRelationDesc->rd_att->constr->num_defval > 0 )
{
HeapTuple newtuple;
newtuple = ExecAttrDefault (resultRelationDesc, tuple);
if ( newtuple != tuple )
{
Assert ( slot->ttc_shouldFree );
slot->val = tuple = newtuple;
}
}
if ( resultRelationDesc->rd_att->constr->has_not_null )
{
int attrChk;
for (attrChk = 1; attrChk <= resultRelationDesc->rd_att->natts; attrChk++) {
for (attrChk = 1; attrChk <= resultRelationDesc->rd_att->natts; attrChk++)
{
if (resultRelationDesc->rd_att->attrs[attrChk-1]->attnotnull && heap_attisnull(tuple,attrChk))
elog(WARN,"ExecAppend: Fail to add null value in not null attribute %s",
resultRelationDesc->rd_att->attrs[attrChk-1]->attname.data);
}
}
}
/* ----------------
* insert the tuple
@ -1106,3 +1134,57 @@ ExecReplace(TupleTableSlot *slot,
ExecInsertIndexTuples(slot, &(tuple->t_ctid), estate, true);
}
}
static HeapTuple
ExecAttrDefault (Relation rel, HeapTuple tuple)
{
int ndef = rel->rd_att->constr->num_defval;
AttrDefault *attrdef = rel->rd_att->constr->defval;
ExprContext *econtext = makeNode(ExprContext);
Node *expr;
bool isnull;
bool isdone;
Datum val;
Datum *replValue = NULL;
char *replNull = NULL;
char *repl = NULL;
int i;
for (i = 0; i < ndef; i++)
{
if ( !heap_attisnull (tuple, attrdef[i].adnum) )
continue;
expr = (Node*) stringToNode (attrdef[i].adbin);
econtext->ecxt_scantuple = NULL; /* scan tuple slot */
econtext->ecxt_innertuple = NULL; /* inner tuple slot */
econtext->ecxt_outertuple = NULL; /* outer tuple slot */
econtext->ecxt_relation = NULL; /* relation */
econtext->ecxt_relid = 0; /* relid */
econtext->ecxt_param_list_info = NULL; /* param list info */
econtext->ecxt_range_table = NULL; /* range table */
val = ExecEvalExpr (expr, econtext, &isnull, &isdone);
if ( isnull )
continue;
if ( repl == NULL )
{
repl = (char*) palloc (rel->rd_att->natts * sizeof (char));
replNull = (char*) palloc (rel->rd_att->natts * sizeof (char));
replValue = (Datum*) palloc (rel->rd_att->natts * sizeof (Datum));
memset (repl, ' ', rel->rd_att->natts * sizeof (char));
}
repl[attrdef[i].adnum - 1] = 'r';
replNull[attrdef[i].adnum - 1] = ' ';
replValue[attrdef[i].adnum - 1] = val;
}
if ( repl == NULL )
return (tuple);
return (heap_modifytuple (tuple, InvalidBuffer, rel, replValue, replNull, repl));
}

4
src/backend/executor/execUtils.c
View File

@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.13 1997/08/21 03:01:42 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/executor/execUtils.c,v 1.14 1997/08/22 03:12:19 vadim Exp $
*
*-------------------------------------------------------------------------
*/
@ -1182,6 +1182,7 @@ setVarAttrLenForCreateTable(TupleDesc tupType, List *targetList,
}
#ifdef NOT_USED /* look at execMain.c */
/* ----------------------------------------------------------------
* resetVarAttrLenForCreateTable -
* called when we do a SELECT * INTO TABLE tab
@ -1202,3 +1203,4 @@ resetVarAttrLenForCreateTable(TupleDesc tupType)
tupType->attrs[varno]->attlen = -1;
}
}
#endif