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Reimplement LIKE/ESCAPE as operators so that indexscan optimization 

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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
src/backend/optimizer/path/indxpath.c
View File

@ -9,7 +9,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.95 2000/09/12 21:06:53 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/optimizer/path/indxpath.c,v 1.96 2000/09/15 18:45:25 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1755,6 +1755,20 @@ match_special_index_operator(Expr *clause, Oid opclass, Oid relam,
pfree(patt);
break;
case OID_TEXT_ICLIKE_OP:
case OID_BPCHAR_ICLIKE_OP:
case OID_VARCHAR_ICLIKE_OP:
case OID_NAME_ICLIKE_OP:
/* the right-hand const is type text for all of these */
patt = DatumGetCString(DirectFunctionCall1(textout,
constvalue));
isIndexable = pattern_fixed_prefix(patt, Pattern_Type_Like_IC,
&prefix, &rest) != Pattern_Prefix_None;
if (prefix)
pfree(prefix);
pfree(patt);
break;
case OID_TEXT_REGEXEQ_OP:
case OID_BPCHAR_REGEXEQ_OP:
case OID_VARCHAR_REGEXEQ_OP:
@ -1797,6 +1811,7 @@ match_special_index_operator(Expr *clause, Oid opclass, Oid relam,
switch (expr_op)
{
case OID_TEXT_LIKE_OP:
case OID_TEXT_ICLIKE_OP:
case OID_TEXT_REGEXEQ_OP:
case OID_TEXT_ICREGEXEQ_OP:
if (!op_class(find_operator(">=", TEXTOID), opclass, relam) ||
@ -1805,6 +1820,7 @@ match_special_index_operator(Expr *clause, Oid opclass, Oid relam,
break;
case OID_BPCHAR_LIKE_OP:
case OID_BPCHAR_ICLIKE_OP:
case OID_BPCHAR_REGEXEQ_OP:
case OID_BPCHAR_ICREGEXEQ_OP:
if (!op_class(find_operator(">=", BPCHAROID), opclass, relam) ||
@ -1813,6 +1829,7 @@ match_special_index_operator(Expr *clause, Oid opclass, Oid relam,
break;
case OID_VARCHAR_LIKE_OP:
case OID_VARCHAR_ICLIKE_OP:
case OID_VARCHAR_REGEXEQ_OP:
case OID_VARCHAR_ICREGEXEQ_OP:
if (!op_class(find_operator(">=", VARCHAROID), opclass, relam) ||
@ -1821,6 +1838,7 @@ match_special_index_operator(Expr *clause, Oid opclass, Oid relam,
break;
case OID_NAME_LIKE_OP:
case OID_NAME_ICLIKE_OP:
case OID_NAME_REGEXEQ_OP:
case OID_NAME_ICREGEXEQ_OP:
if (!op_class(find_operator(">=", NAMEOID), opclass, relam) ||
@ -1887,6 +1905,24 @@ expand_indexqual_conditions(List *indexquals)
pfree(patt);
break;
case OID_TEXT_ICLIKE_OP:
case OID_BPCHAR_ICLIKE_OP:
case OID_VARCHAR_ICLIKE_OP:
case OID_NAME_ICLIKE_OP:
/* the right-hand const is type text for all of these */
constvalue = ((Const *) rightop)->constvalue;
patt = DatumGetCString(DirectFunctionCall1(textout,
constvalue));
pstatus = pattern_fixed_prefix(patt, Pattern_Type_Like_IC,
&prefix, &rest);
resultquals = nconc(resultquals,
prefix_quals(leftop, expr_op,
prefix, pstatus));
if (prefix)
pfree(prefix);
pfree(patt);
break;
case OID_TEXT_REGEXEQ_OP:
case OID_BPCHAR_REGEXEQ_OP:
case OID_VARCHAR_REGEXEQ_OP:
@ -1955,24 +1991,28 @@ prefix_quals(Var *leftop, Oid expr_op,
switch (expr_op)
{
case OID_TEXT_LIKE_OP:
case OID_TEXT_ICLIKE_OP:
case OID_TEXT_REGEXEQ_OP:
case OID_TEXT_ICREGEXEQ_OP:
datatype = TEXTOID;
break;
case OID_BPCHAR_LIKE_OP:
case OID_BPCHAR_ICLIKE_OP:
case OID_BPCHAR_REGEXEQ_OP:
case OID_BPCHAR_ICREGEXEQ_OP:
datatype = BPCHAROID;
break;
case OID_VARCHAR_LIKE_OP:
case OID_VARCHAR_ICLIKE_OP:
case OID_VARCHAR_REGEXEQ_OP:
case OID_VARCHAR_ICREGEXEQ_OP:
datatype = VARCHAROID;
break;
case OID_NAME_LIKE_OP:
case OID_NAME_ICLIKE_OP:
case OID_NAME_REGEXEQ_OP:
case OID_NAME_ICREGEXEQ_OP:
datatype = NAMEOID;

64
src/backend/parser/gram.y
View File

@ -11,7 +11,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.189 2000/09/12 21:07:01 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.190 2000/09/15 18:45:30 tgl Exp $
*
* HISTORY
* AUTHOR DATE MAJOR EVENT
@ -365,6 +365,7 @@ static void doNegateFloat(Value *v);
%right '='
%nonassoc '<' '>'
%nonassoc LIKE ILIKE
%nonassoc ESCAPE
%nonassoc OVERLAPS
%nonassoc BETWEEN
%nonassoc IN
@ -382,7 +383,6 @@ static void doNegateFloat(Value *v);
%left '.'
%left '[' ']'
%left TYPECAST
%left ESCAPE
%%
/*
@ -4522,76 +4522,48 @@ a_expr: c_expr
{ $$ = makeA_Expr(NOT, NULL, NULL, $2); }
| a_expr LIKE a_expr
{
FuncCall *n = makeNode(FuncCall);
n->funcname = "like";
n->args = makeList($1, $3, -1);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
$$ = (Node *)n;
}
{ $$ = makeA_Expr(OP, "~~", $1, $3); }
| a_expr LIKE a_expr ESCAPE a_expr
{
FuncCall *n = makeNode(FuncCall);
n->funcname = "like";
n->args = makeList($1, $3, $5, -1);
n->funcname = "like_escape";
n->args = makeList($3, $5, -1);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
$$ = (Node *)n;
$$ = makeA_Expr(OP, "~~", $1, (Node *) n);
}
| a_expr NOT LIKE a_expr
{
FuncCall *n = makeNode(FuncCall);
n->funcname = "notlike";
n->args = makeList($1, $4, -1);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
$$ = (Node *)n;
}
{ $$ = makeA_Expr(OP, "!~~", $1, $4); }
| a_expr NOT LIKE a_expr ESCAPE a_expr
{
FuncCall *n = makeNode(FuncCall);
n->funcname = "notlike";
n->args = makeList($1, $4, $6, -1);
n->funcname = "like_escape";
n->args = makeList($4, $6, -1);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
$$ = (Node *)n;
$$ = makeA_Expr(OP, "!~~", $1, (Node *) n);
}
| a_expr ILIKE a_expr
{
FuncCall *n = makeNode(FuncCall);
n->funcname = "ilike";
n->args = makeList($1, $3, -1);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
$$ = (Node *)n;
}
{ $$ = makeA_Expr(OP, "~~*", $1, $3); }
| a_expr ILIKE a_expr ESCAPE a_expr
{
FuncCall *n = makeNode(FuncCall);
n->funcname = "ilike";
n->args = makeList($1, $3, $5, -1);
n->funcname = "like_escape";
n->args = makeList($3, $5, -1);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
$$ = (Node *)n;
$$ = makeA_Expr(OP, "~~*", $1, (Node *) n);
}
| a_expr NOT ILIKE a_expr
{
FuncCall *n = makeNode(FuncCall);
n->funcname = "inotlike";
n->args = makeList($1, $4, -1);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
$$ = (Node *)n;
}
{ $$ = makeA_Expr(OP, "!~~*", $1, $4); }
| a_expr NOT ILIKE a_expr ESCAPE a_expr
{
FuncCall *n = makeNode(FuncCall);
n->funcname = "inotlike";
n->args = makeList($1, $4, $6, -1);
n->funcname = "like_escape";
n->args = makeList($4, $6, -1);
n->agg_star = FALSE;
n->agg_distinct = FALSE;
$$ = (Node *)n;
$$ = makeA_Expr(OP, "!~~*", $1, (Node *) n);
}
| a_expr ISNULL

755
src/backend/utils/adt/like.c
View File

@ -11,12 +11,14 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/like.c,v 1.41 2000/08/22 06:33:57 ishii Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/like.c,v 1.42 2000/09/15 18:45:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <ctype.h>
#ifdef MULTIBYTE
#include "mb/pg_wchar.h"
#endif
@ -28,391 +30,12 @@
#define LIKE_ABORT (-1)
static int MatchText(unsigned char * t, int tlen, unsigned char * p, int plen, char *e);
static int MatchTextLower(unsigned char * t, int tlen, unsigned char * p, int plen, char *e);
static int MatchText(unsigned char * t, int tlen,
unsigned char * p, int plen);
static int MatchTextIC(unsigned char * t, int tlen,
unsigned char * p, int plen);
/*
* interface routines called by the function manager
*/
Datum
namelike(PG_FUNCTION_ARGS)
{
bool result;
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
unsigned char *s, *p;
int slen, plen;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchText(s, slen, p, plen, "\\") == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
namenlike(PG_FUNCTION_ARGS)
{
bool result;
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
unsigned char *s, *p;
int slen, plen;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchText(s, slen, p, plen, "\\") != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
namelike_escape(PG_FUNCTION_ARGS)
{
bool result;
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
text *esc = PG_GETARG_TEXT_P(2);
unsigned char *s, *p;
int slen, plen;
char *e;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = ((VARSIZE(esc)-VARHDRSZ) > 0? VARDATA(esc): NULL);
result = (MatchText(s, slen, p, plen, e) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
namenlike_escape(PG_FUNCTION_ARGS)
{
bool result;
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
text *esc = PG_GETARG_TEXT_P(2);
unsigned char *s, *p;
int slen, plen;
char *e;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = ((VARSIZE(esc)-VARHDRSZ) > 0? VARDATA(esc): NULL);
result = (MatchText(s, slen, p, plen, e) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
textlike(PG_FUNCTION_ARGS)
{
bool result;
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
unsigned char *s, *p;
int slen, plen;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchText(s, slen, p, plen, NULL) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
textnlike(PG_FUNCTION_ARGS)
{
bool result;
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
unsigned char *s, *p;
int slen, plen;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchText(s, slen, p, plen, "\\") != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
textlike_escape(PG_FUNCTION_ARGS)
{
bool result;
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
text *esc = PG_GETARG_TEXT_P(2);
unsigned char *s, *p;
int slen, plen;
char *e;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = ((VARSIZE(esc)-VARHDRSZ) > 0? VARDATA(esc): NULL);
result = (MatchText(s, slen, p, plen, e) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
textnlike_escape(PG_FUNCTION_ARGS)
{
bool result;
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
text *esc = PG_GETARG_TEXT_P(2);
unsigned char *s, *p;
int slen, plen;
char *e;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = ((VARSIZE(esc)-VARHDRSZ) > 0? VARDATA(esc): NULL);
result = (MatchText(s, slen, p, plen, e) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
/*
* Case-insensitive versions
*/
Datum
inamelike(PG_FUNCTION_ARGS)
{
bool result;
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
unsigned char *s, *p;
int slen, plen;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchTextLower(s, slen, p, plen, "\\") == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
inamenlike(PG_FUNCTION_ARGS)
{
bool result;
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
unsigned char *s, *p;
int slen, plen;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchTextLower(s, slen, p, plen, "\\") != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
inamelike_escape(PG_FUNCTION_ARGS)
{
bool result;
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
text *esc = PG_GETARG_TEXT_P(2);
unsigned char *s, *p;
int slen, plen;
char *e;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = ((VARSIZE(esc)-VARHDRSZ) > 0? VARDATA(esc): NULL);
result = (MatchTextLower(s, slen, p, plen, e) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
inamenlike_escape(PG_FUNCTION_ARGS)
{
bool result;
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
text *esc = PG_GETARG_TEXT_P(2);
unsigned char *s, *p;
int slen, plen;
char *e;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = ((VARSIZE(esc)-VARHDRSZ) > 0? VARDATA(esc): NULL);
result = (MatchTextLower(s, slen, p, plen, e) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
itextlike(PG_FUNCTION_ARGS)
{
bool result;
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
unsigned char *s, *p;
int slen, plen;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchTextLower(s, slen, p, plen, "\\") == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
itextnlike(PG_FUNCTION_ARGS)
{
bool result;
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
unsigned char *s, *p;
int slen, plen;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchTextLower(s, slen, p, plen, "\\") != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
itextlike_escape(PG_FUNCTION_ARGS)
{
bool result;
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
text *esc = PG_GETARG_TEXT_P(2);
unsigned char *s, *p;
int slen, plen;
char *e;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = ((VARSIZE(esc)-VARHDRSZ) > 0? VARDATA(esc): NULL);
result = (MatchTextLower(s, slen, p, plen, e) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
itextnlike_escape(PG_FUNCTION_ARGS)
{
bool result;
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
text *esc = PG_GETARG_TEXT_P(2);
unsigned char *s, *p;
int slen, plen;
char *e;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = ((VARSIZE(esc)-VARHDRSZ) > 0? VARDATA(esc): NULL);
result = (MatchTextLower(s, slen, p, plen, e) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
/*
** Originally written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.
** Rich $alz is now <rsalz@bbn.com>.
** Special thanks to Lars Mathiesen <thorinn@diku.dk> for the LABORT code.
**
** This code was shamelessly stolen from the "pql" code by myself and
** slightly modified :)
**
** All references to the word "star" were replaced by "percent"
** All references to the word "wild" were replaced by "like"
**
** All the nice shell RE matching stuff was replaced by just "_" and "%"
**
** As I don't have a copy of the SQL standard handy I wasn't sure whether
** to leave in the '\' escape character handling.
**
** Keith Parks. <keith@mtcc.demon.co.uk>
**
** [SQL92 lets you specify the escape character by saying
** LIKE <pattern> ESCAPE <escape character>. We are a small operation
** so we force you to use '\'. - ay 7/95]
**
** OK, we now support the SQL9x LIKE <pattern> ESCAPE <char> syntax.
** We should kill the backslash escaping mechanism since it is non-standard
** and undocumented afaik.
** The code is rewritten to avoid requiring null-terminated strings,
** which in turn allows us to leave out some memcpy() operations.
** This code should be faster and take less memory, but no promises...
** - thomas 2000-08-06
**
*/
/*--------------------
* Match text and p, return LIKE_TRUE, LIKE_FALSE, or LIKE_ABORT.
*
* LIKE_TRUE: they match
* LIKE_FALSE: they don't match
* LIKE_ABORT: not only don't they match, but the text is too short.
*
* If LIKE_ABORT is returned, then no suffix of the text can match the
* pattern either, so an upper-level % scan can stop scanning now.
*--------------------
*/
#ifdef MULTIBYTE
/*--------------------
* Support routine for MatchText. Compares given multibyte streams
@ -435,7 +58,7 @@ static int wchareq(unsigned char *p1, unsigned char *p2)
}
/*--------------------
* Support routine for MatchTextLower. Compares given multibyte streams
* Support routine for MatchTextIC. Compares given multibyte streams
* as wide characters ignoring case.
* If they match, returns 1 otherwise returns 0.
*--------------------
@ -470,36 +93,338 @@ static int iwchareq(unsigned char *p1, unsigned char *p2)
}
return(c1 == c2);
}
#endif
#ifdef MULTIBYTE
#define CHAREQ(p1, p2) wchareq(p1, p2)
#define ICHAREQ(p1, p2) iwchareq(p1, p2)
#define NextChar(p, plen) {int __l = pg_mblen(p); (p) +=__l; (plen) -=__l;}
#define NextChar(p, plen) \
do { int __l = pg_mblen(p); (p) +=__l; (plen) -=__l; } while (0)
#define CopyAdvChar(dst, src, srclen) \
do { int __l = pg_mblen(src); \
(srclen) -= __l; \
while (__l-- > 0) \
*(dst)++ = *(src)++; \
} while (0)
#else
#define CHAREQ(p1, p2) (*(p1) == *(p2))
#define ICHAREQ(p1, p2) (tolower(*(p1)) == tolower(*(p2)))
#define NextChar(p, plen) (p)++, (plen)--
#define NextChar(p, plen) ((p)++, (plen)--)
#define CopyAdvChar(dst, src, srclen) (*(dst)++ = *(src)++, (srclen)--)
#endif
static int
MatchText(unsigned char * t, int tlen, unsigned char * p, int plen, char *e)
/*
* interface routines called by the function manager
*/
Datum
namelike(PG_FUNCTION_ARGS)
{
/* Fast path for match-everything pattern
* Include weird case of escape character as a percent sign or underscore,
* when presumably that wildcard character becomes a literal.
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
bool result;
unsigned char *s, *p;
int slen, plen;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchText(s, slen, p, plen) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
namenlike(PG_FUNCTION_ARGS)
{
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
bool result;
unsigned char *s, *p;
int slen, plen;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchText(s, slen, p, plen) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
textlike(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
bool result;
unsigned char *s, *p;
int slen, plen;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchText(s, slen, p, plen) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
textnlike(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
bool result;
unsigned char *s, *p;
int slen, plen;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchText(s, slen, p, plen) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
/*
* Case-insensitive versions
*/
Datum
nameiclike(PG_FUNCTION_ARGS)
{
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
bool result;
unsigned char *s, *p;
int slen, plen;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchTextIC(s, slen, p, plen) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
nameicnlike(PG_FUNCTION_ARGS)
{
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
bool result;
unsigned char *s, *p;
int slen, plen;
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchTextIC(s, slen, p, plen) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
texticlike(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
bool result;
unsigned char *s, *p;
int slen, plen;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchTextIC(s, slen, p, plen) == LIKE_TRUE);
PG_RETURN_BOOL(result);
}
Datum
texticnlike(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
bool result;
unsigned char *s, *p;
int slen, plen;
s = VARDATA(str);
slen = (VARSIZE(str)-VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
result = (MatchTextIC(s, slen, p, plen) != LIKE_TRUE);
PG_RETURN_BOOL(result);
}
/*
* like_escape() --- given a pattern and an ESCAPE string,
* convert the pattern to use Postgres' standard backslash escape convention.
*/
Datum
like_escape(PG_FUNCTION_ARGS)
{
text *pat = PG_GETARG_TEXT_P(0);
text *esc = PG_GETARG_TEXT_P(1);
text *result;
unsigned char *p, *e, *r;
int plen, elen;
bool afterescape;
p = VARDATA(pat);
plen = (VARSIZE(pat)-VARHDRSZ);
e = VARDATA(esc);
elen = (VARSIZE(esc)-VARHDRSZ);
/*
* Worst-case pattern growth is 2x --- unlikely, but it's hardly worth
* trying to calculate the size more accurately than that.
*/
if ((plen == 1) && (*p == '%')
&& ! ((e != NULL) && (*e == '%')))
result = (text *) palloc(plen * 2 + VARHDRSZ);
r = VARDATA(result);
if (elen == 0)
{
/*
* No escape character is wanted. Double any backslashes in the
* pattern to make them act like ordinary characters.
*/
while (plen > 0)
{
if (*p == '\\')
*r++ = '\\';
CopyAdvChar(r, p, plen);
}
}
else
{
/*
* The specified escape must be only a single character.
*/
NextChar(e, elen);
if (elen != 0)
elog(ERROR, "ESCAPE string must be empty or one character");
e = VARDATA(esc);
/*
* If specified escape is '\', just copy the pattern as-is.
*/
if (*e == '\\')
{
memcpy(result, pat, VARSIZE(pat));
PG_RETURN_TEXT_P(result);
}
/*
* Otherwise, convert occurrences of the specified escape character
* to '\', and double occurrences of '\' --- unless they immediately
* follow an escape character!
*/
afterescape = false;
while (plen > 0)
{
if (CHAREQ(p,e) && !afterescape)
{
*r++ = '\\';
NextChar(p, plen);
afterescape = true;
}
else if (*p == '\\')
{
*r++ = '\\';
if (! afterescape)
*r++ = '\\';
NextChar(p, plen);
afterescape = false;
}
else
{
CopyAdvChar(r, p, plen);
afterescape = false;
}
}
}
VARATT_SIZEP(result) = r - ((unsigned char *) result);
PG_RETURN_TEXT_P(result);
}
/*
** Originally written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.
** Rich $alz is now <rsalz@bbn.com>.
** Special thanks to Lars Mathiesen <thorinn@diku.dk> for the LABORT code.
**
** This code was shamelessly stolen from the "pql" code by myself and
** slightly modified :)
**
** All references to the word "star" were replaced by "percent"
** All references to the word "wild" were replaced by "like"
**
** All the nice shell RE matching stuff was replaced by just "_" and "%"
**
** As I don't have a copy of the SQL standard handy I wasn't sure whether
** to leave in the '\' escape character handling.
**
** Keith Parks. <keith@mtcc.demon.co.uk>
**
** SQL92 lets you specify the escape character by saying
** LIKE <pattern> ESCAPE <escape character>. We are a small operation
** so we force you to use '\'. - ay 7/95
**
** Now we have the like_escape() function that converts patterns with
** any specified escape character (or none at all) to the internal
** default escape character, which is still '\'. - tgl 9/2000
**
** The code is rewritten to avoid requiring null-terminated strings,
** which in turn allows us to leave out some memcpy() operations.
** This code should be faster and take less memory, but no promises...
** - thomas 2000-08-06
**
*/
/*--------------------
* Match text and p, return LIKE_TRUE, LIKE_FALSE, or LIKE_ABORT.
*
* LIKE_TRUE: they match
* LIKE_FALSE: they don't match
* LIKE_ABORT: not only don't they match, but the text is too short.
*
* If LIKE_ABORT is returned, then no suffix of the text can match the
* pattern either, so an upper-level % scan can stop scanning now.
*--------------------
*/
static int
MatchText(unsigned char * t, int tlen, unsigned char * p, int plen)
{
/* Fast path for match-everything pattern */
if ((plen == 1) && (*p == '%'))
return LIKE_TRUE;
while ((tlen > 0) && (plen > 0))
{
/* If an escape character was specified and we find it here in the pattern,
* then we'd better have an exact match for the next character.
*/
if ((e != NULL) && CHAREQ(p,e))
if (*p == '\\')
{
/* Next pattern char must match literally, whatever it is */
NextChar(p, plen);
if ((plen <= 0) || !CHAREQ(t,p))
return LIKE_FALSE;
@ -525,10 +450,9 @@ MatchText(unsigned char * t, int tlen, unsigned char * p, int plen, char *e)
* recurse unless first pattern char might match this
* text char.
*/
if (CHAREQ(t,p) || (*p == '_')
|| ((e != NULL) && CHAREQ(p,e)))
if (CHAREQ(t,p) || (*p == '\\') || (*p == '_'))
{
int matched = MatchText(t, tlen, p, plen, e);
int matched = MatchText(t, tlen, p, plen);
if (matched != LIKE_FALSE)
return matched; /* TRUE or ABORT */
@ -571,24 +495,21 @@ MatchText(unsigned char * t, int tlen, unsigned char * p, int plen, char *e)
return LIKE_ABORT;
} /* MatchText() */
/*
* Same as above, but ignore case
*/
static int
MatchTextLower(unsigned char * t, int tlen, unsigned char * p, int plen, char *e)
MatchTextIC(unsigned char * t, int tlen, unsigned char * p, int plen)
{
/* Fast path for match-everything pattern
* Include weird case of escape character as a percent sign or underscore,
* when presumably that wildcard character becomes a literal.
*/
if ((plen == 1) && (*p == '%')
&& ! ((e != NULL) && (*e == '%')))
/* Fast path for match-everything pattern */
if ((plen == 1) && (*p == '%'))
return LIKE_TRUE;
while ((tlen > 0) && (plen > 0))
{
/* If an escape character was specified and we find it here in the pattern,
* then we'd better have an exact match for the next character.
*/
if ((e != NULL) && ICHAREQ(p,e))
if (*p == '\\')
{
/* Next pattern char must match literally, whatever it is */
NextChar(p, plen);
if ((plen <= 0) || !ICHAREQ(t,p))
return LIKE_FALSE;
@ -614,10 +535,9 @@ MatchTextLower(unsigned char * t, int tlen, unsigned char * p, int plen, char *e
* recurse unless first pattern char might match this
* text char.
*/
if (ICHAREQ(t,p) || (*p == '_')
|| ((e != NULL) && ICHAREQ(p,e)))
if (ICHAREQ(t,p) || (*p == '\\') || (*p == '_'))
{
int matched = MatchText(t, tlen, p, plen, e);
int matched = MatchTextIC(t, tlen, p, plen);
if (matched != LIKE_FALSE)
return matched; /* TRUE or ABORT */
@ -634,6 +554,9 @@ MatchTextLower(unsigned char * t, int tlen, unsigned char * p, int plen, char *e
}
else if ((*p != '_') && !ICHAREQ(t,p))
{
/* Not the single-character wildcard and no explicit match?
* Then time to quit...
*/
return LIKE_FALSE;
}
@ -655,4 +578,4 @@ MatchTextLower(unsigned char * t, int tlen, unsigned char * p, int plen, char *e
* start matching this pattern.
*/
return LIKE_ABORT;
} /* MatchTextLower() */
} /* MatchTextIC() */

68
src/backend/utils/adt/selfuncs.c
View File

@ -15,7 +15,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.78 2000/08/03 16:34:22 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/selfuncs.c,v 1.79 2000/09/15 18:45:26 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -570,6 +570,15 @@ likesel(PG_FUNCTION_ARGS)
return patternsel(fcinfo, Pattern_Type_Like);
}
/*
* iclikesel - Selectivity of ILIKE pattern match.
*/
Datum
iclikesel(PG_FUNCTION_ARGS)
{
return patternsel(fcinfo, Pattern_Type_Like_IC);
}
/*
* regexnesel - Selectivity of regular-expression pattern non-match.
*/
@ -609,6 +618,19 @@ nlikesel(PG_FUNCTION_ARGS)
PG_RETURN_FLOAT8(result);
}
/*
* icnlikesel - Selectivity of ILIKE pattern non-match.
*/
Datum
icnlikesel(PG_FUNCTION_ARGS)
{
float8 result;
result = DatumGetFloat8(patternsel(fcinfo, Pattern_Type_Like_IC));
result = 1.0 - result;
PG_RETURN_FLOAT8(result);
}
/*
* eqjoinsel - Join selectivity of "="
*/
@ -723,6 +745,15 @@ likejoinsel(PG_FUNCTION_ARGS)
PG_RETURN_FLOAT8(DEFAULT_MATCH_SEL);
}
/*
* iclikejoinsel - Join selectivity of ILIKE pattern match.
*/
Datum
iclikejoinsel(PG_FUNCTION_ARGS)
{
PG_RETURN_FLOAT8(DEFAULT_MATCH_SEL);
}
/*
* regexnejoinsel - Join selectivity of regex non-match.
*/
@ -762,6 +793,19 @@ nlikejoinsel(PG_FUNCTION_ARGS)
PG_RETURN_FLOAT8(result);
}
/*
* icnlikejoinsel - Join selectivity of ILIKE pattern non-match.
*/
Datum
icnlikejoinsel(PG_FUNCTION_ARGS)
{
float8 result;
result = DatumGetFloat8(iclikejoinsel(fcinfo));
result = 1.0 - result;
PG_RETURN_FLOAT8(result);
}
/*
* convert_to_scalar
@ -1337,7 +1381,8 @@ getattstatistics(Oid relid,
*/
static Pattern_Prefix_Status
like_fixed_prefix(char *patt, char **prefix, char **rest)
like_fixed_prefix(char *patt, bool case_insensitive,
char **prefix, char **rest)
{
char *match;
int pos,
@ -1359,7 +1404,12 @@ like_fixed_prefix(char *patt, char **prefix, char **rest)
if (patt[pos] == '\0')
break;
}
/*
* XXX I suspect isalpha() is not an adequately locale-sensitive
* test for characters that can vary under case folding?
*/
if (case_insensitive && isalpha((int) patt[pos]))
break;
/*
* NOTE: this code used to think that %% meant a literal %, but
* textlike() itself does not think that, and the SQL92 spec
@ -1497,7 +1547,10 @@ pattern_fixed_prefix(char *patt, Pattern_Type ptype,
switch (ptype)
{
case Pattern_Type_Like:
result = like_fixed_prefix(patt, prefix, rest);
result = like_fixed_prefix(patt, false, prefix, rest);
break;
case Pattern_Type_Like_IC:
result = like_fixed_prefix(patt, true, prefix, rest);
break;
case Pattern_Type_Regex:
result = regex_fixed_prefix(patt, false, prefix, rest);
@ -1625,7 +1678,7 @@ prefix_selectivity(char *prefix,
#define PARTIAL_WILDCARD_SEL 2.0
static Selectivity
like_selectivity(char *patt)
like_selectivity(char *patt, bool case_insensitive)
{
Selectivity sel = 1.0;
int pos;
@ -1780,7 +1833,10 @@ pattern_selectivity(char *patt, Pattern_Type ptype)
switch (ptype)
{
case Pattern_Type_Like:
result = like_selectivity(patt);
result = like_selectivity(patt, false);
break;
case Pattern_Type_Like_IC:
result = like_selectivity(patt, true);
break;
case Pattern_Type_Regex:
result = regex_selectivity(patt, false);

4
src/include/catalog/catversion.h
View File

@ -37,7 +37,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: catversion.h,v 1.45 2000/09/12 21:07:06 tgl Exp $
* $Id: catversion.h,v 1.46 2000/09/15 18:45:27 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -53,6 +53,6 @@
*/
/* yyyymmddN */
#define CATALOG_VERSION_NO 200009121
#define CATALOG_VERSION_NO 200009151
#endif

18
src/include/catalog/pg_operator.h
View File

@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pg_operator.h,v 1.81 2000/08/21 04:48:51 tgl Exp $
* $Id: pg_operator.h,v 1.82 2000/09/15 18:45:27 tgl Exp $
*
* NOTES
* the genbki.sh script reads this file and generates .bki
@ -537,7 +537,7 @@ DATA(insert OID = 1213 ( "~~" PGUID 0 b t f 1043 25 16 0 1214 0 0 textlike
#define OID_VARCHAR_LIKE_OP 1213
DATA(insert OID = 1214 ( "!~~" PGUID 0 b t f 1043 25 16 0 1213 0 0 textnlike nlikesel nlikejoinsel ));
/* case-insensitive LIKE hacks */
/* case-insensitive regex hacks */
DATA(insert OID = 1226 ( "~*" PGUID 0 b t f 19 25 16 0 1227 0 0 nameicregexeq icregexeqsel icregexeqjoinsel ));
#define OID_NAME_ICREGEXEQ_OP 1226
DATA(insert OID = 1227 ( "!~*" PGUID 0 b t f 19 25 16 0 1226 0 0 nameicregexne icregexnesel icregexnejoinsel ));
@ -690,6 +690,20 @@ DATA(insert OID = 827 ( "<<=" PGUID 0 b t f 650 650 16 1004 0 0 0 network_
DATA(insert OID = 828 ( ">>" PGUID 0 b t f 650 650 16 826 0 0 0 network_sup - - ));
DATA(insert OID = 1004 ( ">>=" PGUID 0 b t f 650 650 16 827 0 0 0 network_supeq - - ));
/* case-insensitive LIKE hacks */
DATA(insert OID = 1625 ( "~~*" PGUID 0 b t f 19 25 16 0 1626 0 0 nameiclike iclikesel iclikejoinsel ));
#define OID_NAME_ICLIKE_OP 1625
DATA(insert OID = 1626 ( "!~~*" PGUID 0 b t f 19 25 16 0 1625 0 0 nameicnlike icnlikesel icnlikejoinsel ));
DATA(insert OID = 1627 ( "~~*" PGUID 0 b t f 25 25 16 0 1628 0 0 texticlike iclikesel iclikejoinsel ));
#define OID_TEXT_ICLIKE_OP 1627
DATA(insert OID = 1628 ( "!~~*" PGUID 0 b t f 25 25 16 0 1627 0 0 texticnlike icnlikesel icnlikejoinsel ));
DATA(insert OID = 1629 ( "~~*" PGUID 0 b t f 1042 25 16 0 1630 0 0 texticlike iclikesel iclikejoinsel ));
#define OID_BPCHAR_ICLIKE_OP 1629
DATA(insert OID = 1630 ( "!~~*" PGUID 0 b t f 1042 25 16 0 1629 0 0 texticnlike icnlikesel icnlikejoinsel ));
DATA(insert OID = 1631 ( "~~*" PGUID 0 b t f 1043 25 16 0 1632 0 0 texticlike iclikesel iclikejoinsel ));
#define OID_VARCHAR_ICLIKE_OP 1631
DATA(insert OID = 1632 ( "!~~*" PGUID 0 b t f 1043 25 16 0 1631 0 0 texticnlike icnlikesel icnlikejoinsel ));
/* NUMERIC type - OID's 1700-1799 */
DATA(insert OID = 1751 ( "-" PGUID 0 l t f 0 1700 1700 0 0 0 0 numeric_uminus - - ));
DATA(insert OID = 1752 ( "=" PGUID 0 b t f 1700 1700 16 1752 1753 1754 1754 numeric_eq eqsel eqjoinsel ));

44
src/include/catalog/pg_proc.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: pg_proc.h,v 1.165 2000/09/05 20:25:13 wieck Exp $
* $Id: pg_proc.h,v 1.166 2000/09/15 18:45:27 tgl Exp $
*
* NOTES
* The script catalog/genbki.sh reads this file and generates .bki
@ -2039,30 +2039,16 @@ DATA(insert OID = 1623 ( varchar PGUID 12 f t t t 1 f 1043 "20" 100 0 0 100
DESCR("convert int8 to varchar");
DATA(insert OID = 1624 ( mul_d_interval PGUID 12 f t t t 2 f 1186 "701 1186" 100 0 0 100 mul_d_interval - ));
DATA(insert OID = 1625 ( like PGUID 12 f t t t 3 f 16 "19 25 25" 100 0 0 100 namelike_escape - ));
DESCR("matches LIKE expression");
DATA(insert OID = 1626 ( notlike PGUID 12 f t t t 3 f 16 "19 25 25" 100 0 0 100 namenlike_escape - ));
DESCR("does not match LIKE expression");
DATA(insert OID = 1627 ( ilike PGUID 12 f t t t 3 f 16 "19 25 25" 100 0 0 100 inamelike_escape - ));
DESCR("matches case-insensitive LIKE expression");
DATA(insert OID = 1628 ( inotlike PGUID 12 f t t t 3 f 16 "19 25 25" 100 0 0 100 inamenlike_escape - ));
DESCR("does not match case-insensitive LIKE expression");
DATA(insert OID = 1629 ( like PGUID 12 f t t t 3 f 16 "25 25 25" 100 0 0 100 textlike_escape - ));
DESCR("matches LIKE expression");
DATA(insert OID = 1630 ( notlike PGUID 12 f t t t 3 f 16 "25 25 25" 100 0 0 100 textnlike_escape - ));
DESCR("does not match LIKE expression");
DATA(insert OID = 1631 ( ilike PGUID 12 f t t t 3 f 16 "25 25 25" 100 0 0 100 itextlike_escape - ));
DESCR("matches case-insensitive LIKE expression");
DATA(insert OID = 1632 ( inotlike PGUID 12 f t t t 3 f 16 "25 25 25" 100 0 0 100 itextnlike_escape - ));
DESCR("does not match case-insensitive LIKE expression");
DATA(insert OID = 1633 ( ilike PGUID 12 f t t t 2 f 16 "25 25" 100 0 0 100 itextlike - ));
DESCR("matches case-insensitive LIKE expression");
DATA(insert OID = 1634 ( inotlike PGUID 12 f t t t 2 f 16 "25 25" 100 0 0 100 itextnlike - ));
DESCR("does not match case-insensitive LIKE expression");
DATA(insert OID = 1635 ( ilike PGUID 12 f t t t 2 f 16 "19 25" 100 0 0 100 inamelike - ));
DESCR("matches case-insensitive LIKE expression");
DATA(insert OID = 1636 ( inotlike PGUID 12 f t t t 2 f 16 "19 25" 100 0 0 100 inamenlike - ));
DESCR("does not match case-insensitive LIKE expression");
DATA(insert OID = 1633 ( texticlike PGUID 12 f t t t 2 f 16 "25 25" 100 0 0 100 texticlike - ));
DESCR("matches LIKE expression, case-insensitive");
DATA(insert OID = 1634 ( texticnlike PGUID 12 f t t t 2 f 16 "25 25" 100 0 0 100 texticnlike - ));
DESCR("does not match LIKE expression, case-insensitive");
DATA(insert OID = 1635 ( nameiclike PGUID 12 f t t t 2 f 16 "19 25" 100 0 0 100 nameiclike - ));
DESCR("matches LIKE expression, case-insensitive");
DATA(insert OID = 1636 ( nameicnlike PGUID 12 f t t t 2 f 16 "19 25" 100 0 0 100 nameicnlike - ));
DESCR("does not match LIKE expression, case-insensitive");
DATA(insert OID = 1637 ( like_escape PGUID 12 f t t t 2 f 25 "25 25" 100 0 0 100 like_escape - ));
DESCR("convert match pattern to use backslash escapes");
DATA(insert OID = 1689 ( update_pg_pwd PGUID 12 f t f t 0 f 0 "" 100 0 0 100 update_pg_pwd - ));
DESCR("update pg_pwd file");
@ -2420,6 +2406,14 @@ DATA(insert OID = 1799 ( oidout PGUID 12 f t t t 1 f 23 "0" 100 0 0 100 oi
DESCR("(internal)");
/* Selectivity estimators for LIKE and related operators */
DATA(insert OID = 1814 ( iclikesel PGUID 12 f t f t 5 f 701 "26 26 21 0 23" 100 0 0 100 iclikesel - ));
DESCR("restriction selectivity of ILIKE");
DATA(insert OID = 1815 ( icnlikesel PGUID 12 f t f t 5 f 701 "26 26 21 0 23" 100 0 0 100 icnlikesel - ));
DESCR("restriction selectivity of NOT ILIKE");
DATA(insert OID = 1816 ( iclikejoinsel PGUID 12 f t f t 5 f 701 "26 26 21 26 21" 100 0 0 100 iclikejoinsel - ));
DESCR("join selectivity of ILIKE");
DATA(insert OID = 1817 ( icnlikejoinsel PGUID 12 f t f t 5 f 701 "26 26 21 26 21" 100 0 0 100 icnlikejoinsel - ));
DESCR("join selectivity of NOT ILIKE");
DATA(insert OID = 1818 ( regexeqsel PGUID 12 f t f t 5 f 701 "26 26 21 0 23" 100 0 0 100 regexeqsel - ));
DESCR("restriction selectivity of regex match");
DATA(insert OID = 1819 ( likesel PGUID 12 f t f t 5 f 701 "26 26 21 0 23" 100 0 0 100 likesel - ));

26
src/include/utils/builtins.h
View File

@ -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);

4
src/test/regress/expected/strings.out
View File

@ -443,13 +443,13 @@ SELECT 'hawkeye' NOT ILIKE 'H%' AS "false";
SELECT 'hawkeye' ILIKE 'H%Eye' AS "true";
true
------
f
t
(1 row)
SELECT 'hawkeye' NOT ILIKE 'H%Eye' AS "false";
false
-------
t
f
(1 row)
SELECT 'Hawkeye' ILIKE 'h%' AS "true";