TODO item - tid <> operator - Mailing list pgsql-patches

Please find enclosed a patch that adds a '<>' operator for tid types
(per TODO item). Patch is against current sources (beta4).

If I have understood the requirement properly, the relevant function
'tidne' already existed in src/backend/utils/adt/tid.c, just needed an
ifdef NOT_USED removed. The '<>' operator however, needed to be added.

I have renumbered the OIDs for the various tid functions in order to
keep them together with the 'new' tidne one in pg_proc.h - as we have
run out of OIDs in the old range. Similarly for the '=' operator in
pg_operator.h.

with the patch applied, all 98 regression tests pass, plus it seems to
work ok :-)


test=# select ctid, id from foo where ctid != '(0,1)';
  ctid  | id
-------+----
  (0,2) |  2
  (0,3) |  3
(2 rows)

regards

Mark
Index: src/include/catalog/pg_proc.h
===================================================================
RCS file: /projects/cvsroot/pgsql/src/include/catalog/pg_proc.h,v
retrieving revision 1.387
diff -c -r1.387 pg_proc.h
*** src/include/catalog/pg_proc.h    15 Oct 2005 02:49:42 -0000    1.387
--- src/include/catalog/pg_proc.h    24 Oct 2005 02:34:49 -0000
***************
*** 1625,1637 ****
  DATA(insert OID = 1291 (  array_length_coerce    PGNSP PGUID 12 f f t f s 3 2277 "2277 23 16" _null_ _null_ _null_
array_length_coerce- _null_ )); 
  DESCR("adjust any array to new element typmod");

- DATA(insert OID = 1292 ( tideq               PGNSP PGUID 12 f f t f i 2 16 "27 27" _null_ _null_ _null_ tideq -
_null_)); 
- DESCR("equal");
- DATA(insert OID = 1293 ( currtid           PGNSP PGUID 12 f f t f v 2 27 "26 27" _null_ _null_ _null_
currtid_byreloid- _null_ )); 
- DESCR("latest tid of a tuple");
- DATA(insert OID = 1294 ( currtid2           PGNSP PGUID 12 f f t f v 2 27 "25 27" _null_ _null_ _null_
currtid_byrelname- _null_ )); 
- DESCR("latest tid of a tuple");
-
  DATA(insert OID = 2168 ( pg_database_size        PGNSP PGUID 12 f f t f v 1 20 "19" _null_ _null_ _null_
pg_database_size_name- _null_ )); 
  DESCR("Calculate total disk space usage for the specified database");

--- 1625,1630 ----
***************
*** 3765,3770 ****
--- 3758,3772 ----
  DATA(insert OID = 2592 (  gist_circle_compress    PGNSP PGUID 12 f f t f i 1 2281 "2281" _null_ _null_ _null_
gist_circle_compress- _null_ )); 
  DESCR("GiST support");

+ /* Tid functions */
+ DATA(insert OID = 2601 ( tideq               PGNSP PGUID 12 f f t f i 2 16 "27 27" _null_ _null_ _null_ tideq -
_null_)); 
+ DESCR("equal");
+ DATA(insert OID = 2602 ( currtid           PGNSP PGUID 12 f f t f v 2 27 "26 27" _null_ _null_ _null_
currtid_byreloid- _null_ )); 
+ DESCR("latest tid of a tuple");
+ DATA(insert OID = 2603 ( currtid2           PGNSP PGUID 12 f f t f v 2 27 "25 27" _null_ _null_ _null_
currtid_byrelname- _null_ )); 
+ DESCR("latest tid of a tuple");
+ DATA(insert OID = 2604 ( tidne               PGNSP PGUID 12 f f t f i 2 16 "27 27" _null_ _null_ _null_ tidne -
_null_)); 
+ DESCR("not equal");

  /*
   * Symbolic values for provolatile column: these indicate whether the result
Index: src/include/catalog/pg_operator.h
===================================================================
RCS file: /projects/cvsroot/pgsql/src/include/catalog/pg_operator.h,v
retrieving revision 1.137
diff -c -r1.137 pg_operator.h
*** src/include/catalog/pg_operator.h    15 Oct 2005 02:49:42 -0000    1.137
--- src/include/catalog/pg_operator.h    24 Oct 2005 02:34:50 -0000
***************
*** 128,135 ****
  DATA(insert OID = 389 (  "!!"       PGNSP PGUID l f     0    20    1700   0   0   0   0  0   0 numeric_fac - - ));
  DATA(insert OID = 385 (  "="       PGNSP PGUID b t    29    29    16 385     0     0     0     0     0 cideq eqsel
eqjoinsel)); 
  DATA(insert OID = 386 (  "="       PGNSP PGUID b t    22    22    16 386     0     0     0     0     0 int2vectoreq
eqseleqjoinsel )); 
! DATA(insert OID = 387 (  "="       PGNSP PGUID b f    27    27    16 387     0     0     0     0     0 tideq eqsel
eqjoinsel)); 
! #define TIDEqualOperator   387

  DATA(insert OID = 410 ( "="           PGNSP PGUID b t    20    20    16 410 411 412 412 412 413 int8eq eqsel
eqjoinsel)); 
  DATA(insert OID = 411 ( "<>"       PGNSP PGUID b f    20    20    16 411 410 0 0 0 0 int8ne neqsel neqjoinsel ));
--- 128,136 ----
  DATA(insert OID = 389 (  "!!"       PGNSP PGUID l f     0    20    1700   0   0   0   0  0   0 numeric_fac - - ));
  DATA(insert OID = 385 (  "="       PGNSP PGUID b t    29    29    16 385     0     0     0     0     0 cideq eqsel
eqjoinsel)); 
  DATA(insert OID = 386 (  "="       PGNSP PGUID b t    22    22    16 386     0     0     0     0     0 int2vectoreq
eqseleqjoinsel )); 
! DATA(insert OID = 390 (  "<>"       PGNSP PGUID b f    27    27    16 390     0     0     0     0     0 tidne neqsel
neqjoinsel)); 
! DATA(insert OID = 391 (  "="       PGNSP PGUID b f    27    27    16 391     0     0     0     0     0 tideq eqsel
eqjoinsel)); 
! #define TIDEqualOperator   391

  DATA(insert OID = 410 ( "="           PGNSP PGUID b t    20    20    16 410 411 412 412 412 413 int8eq eqsel
eqjoinsel)); 
  DATA(insert OID = 411 ( "<>"       PGNSP PGUID b f    20    20    16 411 410 0 0 0 0 int8ne neqsel neqjoinsel ));
Index: src/backend/utils/adt/tid.c
===================================================================
RCS file: /projects/cvsroot/pgsql/src/backend/utils/adt/tid.c,v
retrieving revision 1.49
diff -c -r1.49 tid.c
*** src/backend/utils/adt/tid.c    27 May 2005 00:57:49 -0000    1.49
--- src/backend/utils/adt/tid.c    24 Oct 2005 02:34:51 -0000
***************
*** 174,180 ****
                     arg1->ip_posid == arg2->ip_posid);
  }

- #ifdef NOT_USED
  Datum
  tidne(PG_FUNCTION_ARGS)
  {
--- 174,179 ----
***************
*** 185,191 ****
                     BlockIdGetBlockNumber(&(arg2->ip_blkid)) ||
                     arg1->ip_posid != arg2->ip_posid);
  }
- #endif

  /*
   *    Functions to get latest tid of a specified tuple.
--- 184,189 ----