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Implement SQL99 OVERLAY(). Allows substitution of a substring in a string.

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Implement SQL99 SIMILAR TO as a synonym for our existing operator "~".
Implement SQL99 regular expression SUBSTRING(string FROM pat FOR escape).
 Extend the definition to make the FOR clause optional.
 Define textregexsubstr() to actually implement this feature.
Update the regression test to include these new string features.
 All tests pass.
Rename the regular expression support routines from "pg95_xxx" to "pg_xxx".
Define CREATE CHARACTER SET in the parser per SQL99. No implementation yet.
This commit is contained in:
Thomas G. Lockhart
2002-06-11 15:44:38 +00:00
parent 090dd22de6
commit ea01a451cc
16 changed files with 521 additions and 258 deletions
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8
src/backend/regex/regcomp.c
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@ -174,9 +174,10 @@ static int never = 0; /* for use in asserts; shuts lint up */
/*
* regcomp - interface for parser and compilation
* returns 0 success, otherwise REG_something
*/
int /* 0 success, otherwise REG_something */
pg95_regcomp(regex_t *preg, const char *pattern, int cflags)
int
pg_regcomp(regex_t *preg, const char *pattern, int cflags)
{
struct parse pa;
struct re_guts *g;
@ -224,7 +225,6 @@ pg95_regcomp(regex_t *preg, const char *pattern, int cflags)
(void) pg_mb2wchar((unsigned char *) pattern, wcp);
len = pg_wchar_strlen(wcp);
#else
len = strlen((char *) pattern);
#endif
}
@ -305,7 +305,7 @@ pg95_regcomp(regex_t *preg, const char *pattern, int cflags)
/* win or lose, we're done */
if (p->error != 0) /* lose */
pg95_regfree(preg);
pg_regfree(preg);
return p->error;
}

4
src/backend/regex/regerror.c
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@ -117,8 +117,8 @@ static struct rerr
*/
/* ARGSUSED */
size_t
pg95_regerror(int errcode, const regex_t *preg,
char *errbuf, size_t errbuf_size)
pg_regerror(int errcode, const regex_t *preg,
char *errbuf, size_t errbuf_size)
{
struct rerr *r;
size_t len;

4
src/backend/regex/regexec.c
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@ -149,8 +149,8 @@ do { \
* when choosing which matcher to call.
*/
int /* 0 success, REG_NOMATCH failure */
pg95_regexec(const regex_t *preg, const char *string, size_t nmatch,
regmatch_t *pmatch, int eflags)
pg_regexec(const regex_t *preg, const char *string, size_t nmatch,
regmatch_t *pmatch, int eflags)
{
struct re_guts *g = preg->re_g;

2
src/backend/regex/regfree.c
View File

@ -49,7 +49,7 @@
* regfree - free everything
*/
void
pg95_regfree(regex_t *preg)
pg_regfree(regex_t *preg)
{
struct re_guts *g;

6
src/backend/regex/retest.c
View File

@ -1,7 +1,7 @@
/*
* a simple regexp debug program
*
* $Header: /cvsroot/pgsql/src/backend/regex/Attic/retest.c,v 1.4 1999/07/17 20:17:34 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/regex/Attic/retest.c,v 1.5 2002/06/11 15:41:37 thomas Exp $
*/
#include "postgres.h"
@ -22,7 +22,7 @@ main()
if (p)
*p = '\0';
sts = pg95_regcomp(&re, buf, 1);
sts = pg_regcomp(&re, buf, 1);
printf("regcomp: parses \"%s\" and returns %d\n", buf, sts);
for (;;)
{
@ -33,7 +33,7 @@ main()
if (p)
*p = '\0';
sts = pg95_regexec(&re, buf, 0, 0, 0);
sts = pg_regexec(&re, buf, 0, 0, 0);
printf("regexec: returns %d\n", sts);
}
}