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Reimplement LIKE/ESCAPE as operators so that indexscan optimization

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can still work, per recent discussion on pghackers.  Correct some bugs
in ILIKE implementation.
This commit is contained in:
Tom Lane
2000-09-15 18:45:31 +00:00
parent 148f905f41
commit 8ae9ad1cb8
9 changed files with 511 additions and 514 deletions
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26
src/include/utils/builtins.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: builtins.h,v 1.136 2000/09/05 20:25:14 wieck Exp $
* $Id: builtins.h,v 1.137 2000/09/15 18:45:29 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -320,9 +320,11 @@ extern Datum scalargtsel(PG_FUNCTION_ARGS);
extern Datum regexeqsel(PG_FUNCTION_ARGS);
extern Datum icregexeqsel(PG_FUNCTION_ARGS);
extern Datum likesel(PG_FUNCTION_ARGS);
extern Datum iclikesel(PG_FUNCTION_ARGS);
extern Datum regexnesel(PG_FUNCTION_ARGS);
extern Datum icregexnesel(PG_FUNCTION_ARGS);
extern Datum nlikesel(PG_FUNCTION_ARGS);
extern Datum icnlikesel(PG_FUNCTION_ARGS);
extern Datum eqjoinsel(PG_FUNCTION_ARGS);
extern Datum neqjoinsel(PG_FUNCTION_ARGS);
@ -331,9 +333,11 @@ extern Datum scalargtjoinsel(PG_FUNCTION_ARGS);
extern Datum regexeqjoinsel(PG_FUNCTION_ARGS);
extern Datum icregexeqjoinsel(PG_FUNCTION_ARGS);
extern Datum likejoinsel(PG_FUNCTION_ARGS);
extern Datum iclikejoinsel(PG_FUNCTION_ARGS);
extern Datum regexnejoinsel(PG_FUNCTION_ARGS);
extern Datum icregexnejoinsel(PG_FUNCTION_ARGS);
extern Datum nlikejoinsel(PG_FUNCTION_ARGS);
extern Datum icnlikejoinsel(PG_FUNCTION_ARGS);
extern Datum btcostestimate(PG_FUNCTION_ARGS);
extern Datum rtcostestimate(PG_FUNCTION_ARGS);
@ -343,7 +347,8 @@ extern Datum gistcostestimate(PG_FUNCTION_ARGS);
/* selfuncs.c supporting routines that are also used by optimizer code */
typedef enum
{
Pattern_Type_Like, Pattern_Type_Regex, Pattern_Type_Regex_IC
Pattern_Type_Like, Pattern_Type_Like_IC,
Pattern_Type_Regex, Pattern_Type_Regex_IC
} Pattern_Type;
typedef enum
@ -432,20 +437,13 @@ extern Datum pgsql_version(PG_FUNCTION_ARGS);
/* like.c */
extern Datum namelike(PG_FUNCTION_ARGS);
extern Datum namenlike(PG_FUNCTION_ARGS);
extern Datum namelike_escape(PG_FUNCTION_ARGS);
extern Datum namenlike_escape(PG_FUNCTION_ARGS);
extern Datum inamelike(PG_FUNCTION_ARGS);
extern Datum inamenlike(PG_FUNCTION_ARGS);
extern Datum inamelike_escape(PG_FUNCTION_ARGS);
extern Datum inamenlike_escape(PG_FUNCTION_ARGS);
extern Datum nameiclike(PG_FUNCTION_ARGS);
extern Datum nameicnlike(PG_FUNCTION_ARGS);
extern Datum textlike(PG_FUNCTION_ARGS);
extern Datum textnlike(PG_FUNCTION_ARGS);
extern Datum textlike_escape(PG_FUNCTION_ARGS);
extern Datum textnlike_escape(PG_FUNCTION_ARGS);
extern Datum itextlike(PG_FUNCTION_ARGS);
extern Datum itextnlike(PG_FUNCTION_ARGS);
extern Datum itextlike_escape(PG_FUNCTION_ARGS);
extern Datum itextnlike_escape(PG_FUNCTION_ARGS);
extern Datum texticlike(PG_FUNCTION_ARGS);
extern Datum texticnlike(PG_FUNCTION_ARGS);
extern Datum like_escape(PG_FUNCTION_ARGS);
/* oracle_compat.c */
extern Datum lower(PG_FUNCTION_ARGS);