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Fix brain death in !!= operator ... it's still pretty bogus

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but at least now it does what it's supposed to do ...
This commit is contained in:
Tom Lane
1999-03-15 03:24:32 +00:00
parent 265c283e1b
commit 4a9c239063
2 changed files with 34 additions and 27 deletions
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57
src/backend/utils/adt/not_in.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/not_in.c,v 1.14 1999/02/13 23:19:26 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/not_in.c,v 1.15 1999/03/15 03:24:32 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -36,11 +36,10 @@ static int my_varattno(Relation rd, char *a);
* ----------------------------------------------------------------
*/
bool
int4notin(int16 not_in_arg, char *relation_and_attr)
int4notin(int32 not_in_arg, char *relation_and_attr)
{
Relation relation_to_scan;
int left_side_argument,
integer_value;
int32 integer_value;
HeapTuple current_tuple;
HeapScanDesc scan_descriptor;
bool dummy,
@ -48,47 +47,55 @@ int4notin(int16 not_in_arg, char *relation_and_attr)
int attrid;
char *relation,
*attribute;
char my_copy[32];
char my_copy[NAMEDATALEN*2+2];
Datum value;
NameData relNameData;
ScanKeyData skeyData;
strcpy(my_copy, relation_and_attr);
strncpy(my_copy, relation_and_attr, sizeof(my_copy));
my_copy[sizeof(my_copy)-1] = '\0';
relation = (char *) strtok(my_copy, ".");
attribute = (char *) strtok(NULL, ".");
/* fetch tuple OID */
left_side_argument = not_in_arg;
if (attribute == NULL)
{
elog(ERROR, "int4notin: must provide relationname.attributename");
}
/* Open the relation and get a relation descriptor */
namestrcpy(&relNameData, relation);
relation_to_scan = heap_openr(relNameData.data);
attrid = my_varattno(relation_to_scan, attribute);
relation_to_scan = heap_openr(relation);
if (!RelationIsValid(relation_to_scan))
{
elog(ERROR, "int4notin: unknown relation %s",
relation);
}
/* Find the column to search */
attrid = my_varattno(relation_to_scan, attribute);
if (attrid < 0)
{
elog(ERROR, "int4notin: unknown attribute %s for relation %s",
attribute, relation);
}
/* the last argument should be a ScanKey, not an integer! - jolly */
/* it looks like the arguments are out of order, too */
/* but skeyData is never initialized! does this work?? - ay 2/95 */
scan_descriptor = heap_beginscan(relation_to_scan, false, SnapshotNow,
0, &skeyData);
0, (ScanKey) NULL);
retval = true;
/* do a scan of the relation, and do the check */
while (HeapTupleIsValid(current_tuple = heap_getnext(scan_descriptor, 0)) &&
retval)
while (HeapTupleIsValid(current_tuple = heap_getnext(scan_descriptor, 0)))
{
value = heap_getattr(current_tuple,
(AttrNumber) attrid,
RelationGetDescr(relation_to_scan),
&dummy);
integer_value = DatumGetInt16(value);
if (left_side_argument == integer_value)
integer_value = DatumGetInt32(value);
if (not_in_arg == integer_value)
{
retval = false;
break; /* can stop scanning now */
}
}
/* close the relation */