Remove the 'not in' operator (!!=). This was a hangover from Berkeley

days that was obsolete the moment we had IN (SELECT ...) capability.
It's arguably a security hole since it applied no permissions check to
the table it searched, and since it was never documented anywhere,
removing it seems more appropriate than fixing it.

src/backend/utils/adt/Makefile

 #
 # Makefile for utils/adt
 #
-# $PostgreSQL: pgsql/src/backend/utils/adt/Makefile,v 1.65 2007/08/21 01:11:18 tgl Exp $
+# $PostgreSQL: pgsql/src/backend/utils/adt/Makefile,v 1.66 2007/08/27 01:39:24 tgl Exp $
 #
 
 subdir = src/backend/utils/adt
@@ -19,7 +19,7 @@ OBJS = acl.o arrayfuncs.o array_userfuncs.o arrayutils.o bool.o \
 	cash.o char.o date.o datetime.o datum.o domains.o \
 	enum.o float.o format_type.o \
 	geo_ops.o geo_selfuncs.o int.o int8.o like.o lockfuncs.o \
-	misc.o nabstime.o name.o not_in.o numeric.o numutils.o \
+	misc.o nabstime.o name.o numeric.o numutils.o \
 	oid.o oracle_compat.o pseudotypes.o rowtypes.o \
 	regexp.o regproc.o ruleutils.o selfuncs.o \
 	tid.o timestamp.o varbit.o varchar.o varlena.o version.o xid.o \

src/backend/utils/adt/not_in.c

-/*-------------------------------------------------------------------------
- *
- * not_in.c
- *	  Executes the "not_in" operator for any data type
- *
- * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
- * Portions Copyright (c) 1994, Regents of the University of California
- *
- *
- * IDENTIFICATION
- *	  $PostgreSQL: pgsql/src/backend/utils/adt/not_in.c,v 1.46 2007/01/05 22:19:41 momjian Exp $
- *
- *-------------------------------------------------------------------------
- */
-/*
- *
- * XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
- * X HACK WARNING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! X
- * XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
- *
- * This code is the OLD not-in code that is HACKED
- * into place until operators that can have arguments as
- * columns are ******REALLY****** implemented!!!!!!!!!!!
- *
- */
-
-#include "postgres.h"
-
-#include "access/heapam.h"
-#include "catalog/namespace.h"
-#include "parser/parse_relation.h"
-#include "utils/builtins.h"
-
-
-/* ----------------------------------------------------------------
- *
- * ----------------------------------------------------------------
- */
-Datum
-int4notin(PG_FUNCTION_ARGS)
-{
-	int32		not_in_arg = PG_GETARG_INT32(0);
-	text	   *relation_and_attr = PG_GETARG_TEXT_P(1);
-	List	   *names;
-	int			nnames;
-	RangeVar   *relrv;
-	char	   *attribute;
-	Relation	relation_to_scan;
-	int32		integer_value;
-	HeapTuple	current_tuple;
-	HeapScanDesc scan_descriptor;
-	bool		isNull,
-				retval;
-	int			attrid;
-	Datum		value;
-
-	/* Parse the argument */
-
-	names = textToQualifiedNameList(relation_and_attr);
-	nnames = list_length(names);
-	if (nnames < 2)
-		ereport(ERROR,
-				(errcode(ERRCODE_INVALID_NAME),
-				 errmsg("invalid name syntax"),
-				 errhint("Must provide \"relationname.columnname\".")));
-	attribute = strVal(llast(names));
-	names = list_truncate(names, nnames - 1);
-	relrv = makeRangeVarFromNameList(names);
-
-	/* Open the relation and get a relation descriptor */
-	relation_to_scan = heap_openrv(relrv, AccessShareLock);
-
-	/* Find the column to search */
-	attrid = attnameAttNum(relation_to_scan, attribute, true);
-	if (attrid == InvalidAttrNumber)
-		ereport(ERROR,
-				(errcode(ERRCODE_UNDEFINED_COLUMN),
-				 errmsg("column \"%s\" of relation \"%s\" does not exist",
-						attribute,
-						RelationGetRelationName(relation_to_scan))));
-
-	scan_descriptor = heap_beginscan(relation_to_scan, SnapshotNow,
-									 0, (ScanKey) NULL);
-
-	retval = true;
-
-	/* do a scan of the relation, and do the check */
-	while ((current_tuple = heap_getnext(scan_descriptor, ForwardScanDirection)) != NULL)
-	{
-		value = heap_getattr(current_tuple,
-							 (AttrNumber) attrid,
-							 RelationGetDescr(relation_to_scan),
-							 &isNull);
-		if (isNull)
-			continue;
-		integer_value = DatumGetInt32(value);
-		if (not_in_arg == integer_value)
-		{
-			retval = false;
-			break;				/* can stop scanning now */
-		}
-	}
-
-	/* close the relation */
-	heap_endscan(scan_descriptor);
-	heap_close(relation_to_scan, AccessShareLock);
-
-	PG_RETURN_BOOL(retval);
-}
-
-Datum
-oidnotin(PG_FUNCTION_ARGS)
-{
-	Oid			the_oid = PG_GETARG_OID(0);
-
-#ifdef NOT_USED
-	text	   *relation_and_attr = PG_GETARG_TEXT_P(1);
-#endif
-
-	if (the_oid == InvalidOid)
-		PG_RETURN_BOOL(false);
-	/* XXX assume oid maps to int4 */
-	return int4notin(fcinfo);
-}

src/include/catalog/catversion.h

@@ -37,7 +37,7 @@
  * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.418 2007/08/25 01:06:25 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/catversion.h,v 1.419 2007/08/27 01:39:24 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	200708241
+#define CATALOG_VERSION_NO	200708261
 
 #endif

src/include/catalog/pg_operator.h

@@ -8,7 +8,7 @@
  * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/catalog/pg_operator.h,v 1.154 2007/08/21 01:11:25 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_operator.h,v 1.155 2007/08/27 01:39:24 tgl Exp $
  *
  * NOTES
  *	  the genbki.sh script reads this file and generates .bki
@@ -290,8 +290,6 @@ DATA(insert OID = 622 (  "<"	   PGNSP PGUID b f f	700  700	16 623 625 float4lt s
 DATA(insert OID = 623 (  ">"	   PGNSP PGUID b f f	700  700	16 622 624 float4gt scalargtsel scalargtjoinsel ));
 DATA(insert OID = 624 (  "<="	   PGNSP PGUID b f f	700  700	16 625 623 float4le scalarltsel scalarltjoinsel ));
 DATA(insert OID = 625 (  ">="	   PGNSP PGUID b f f	700  700	16 624 622 float4ge scalargtsel scalargtjoinsel ));
-DATA(insert OID = 626 (  "!!="	   PGNSP PGUID b f f	23	 25		16 0   0	int4notin - - ));
-DATA(insert OID = 627 (  "!!="	   PGNSP PGUID b f f	26	 25		16 0   0	oidnotin - - ));
 DATA(insert OID = 630 (  "<>"	   PGNSP PGUID b f f	18	18		16 630	92	charne neqsel neqjoinsel ));
 
 DATA(insert OID = 631 (  "<"	   PGNSP PGUID b f f	18	18	16 633 634 charlt scalarltsel scalarltjoinsel ));

src/include/catalog/pg_proc.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.464 2007/08/22 01:39:45 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/catalog/pg_proc.h,v 1.465 2007/08/27 01:39:24 tgl Exp $
  *
  * NOTES
  *	  The script catalog/genbki.sh reads this file and generates .bki
@@ -902,10 +902,6 @@ DESCR("convert int8 to int2");
 DATA(insert OID = 754 (  int8			   PGNSP PGUID 12 1 0 f f t f i 1  20 "21" _null_ _null_ _null_ int28 - _null_ ));
 DESCR("convert int2 to int8");
 
-DATA(insert OID = 1285 (  int4notin		   PGNSP PGUID 12 1 0 f f t f s 2 16 "23 25" _null_ _null_ _null_ int4notin - _null_ ));
-DESCR("not in");
-DATA(insert OID = 1286 (  oidnotin		   PGNSP PGUID 12 1 0 f f t f s 2 16 "26 25" _null_ _null_ _null_ oidnotin - _null_ ));
-DESCR("not in");
 DATA(insert OID = 655 (  namelt			   PGNSP PGUID 12 1 0 f f t f i 2 16 "19 19" _null_ _null_ _null_ namelt - _null_ ));
 DESCR("less-than");
 DATA(insert OID = 656 (  namele			   PGNSP PGUID 12 1 0 f f t f i 2 16 "19 19" _null_ _null_ _null_ namele - _null_ ));

src/include/utils/builtins.h

@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.300 2007/08/21 01:11:30 tgl Exp $
+ * $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.301 2007/08/27 01:39:25 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -418,10 +418,6 @@ extern Datum pg_tablespace_databases(PG_FUNCTION_ARGS);
 extern Datum pg_rotate_logfile(PG_FUNCTION_ARGS);
 extern Datum pg_sleep(PG_FUNCTION_ARGS);
 
-/* not_in.c */
-extern Datum int4notin(PG_FUNCTION_ARGS);
-extern Datum oidnotin(PG_FUNCTION_ARGS);
-
 /* oid.c */
 extern Datum oidin(PG_FUNCTION_ARGS);
 extern Datum oidout(PG_FUNCTION_ARGS);