database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-14 18:42:34 +03:00
Code Activity

Create a GUC variable REGEX_FLAVOR to control the type of regular

Browse Source 
expression accepted by the regex operators, per discussion yesterday.

Along the way, reduce deadlock_timeout from PGC_POSTMASTER to PGC_SIGHUP
category.  It is probably best to insist that all backends share the same
setting, but that doesn't mean it has to be frozen at startup.
This commit is contained in:
Tom Lane
2003-02-06 20:25:33 +00:00
parent 465ed56531
commit 77ede8900d
7 changed files with 114 additions and 53 deletions
Download Patch File Download Diff File Expand all files Collapse all files

52
src/backend/utils/adt/regexp.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regexp.c,v 1.44 2003/02/05 17:41:32 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regexp.c,v 1.45 2003/02/06 20:25:33 tgl Exp $
*
* Alistair Crooks added the code for the regex caching
* agc - cached the regular expressions used - there's a good chance
@ -34,6 +34,10 @@
#include "utils/builtins.h"
/* GUC-settable flavor parameter */
static int regex_flavor = REG_ADVANCED;
/*
* We cache precompiled regular expressions using a "self organizing list"
* structure, in which recently-used items tend to be near the front.
@ -216,6 +220,34 @@ RE_compile_and_execute(text *text_re, unsigned char *dat, int dat_len,
}
/*
* assign_regex_flavor - GUC hook to validate and set REGEX_FLAVOR
*/
const char *
assign_regex_flavor(const char *value,
bool doit, bool interactive)
{
if (strcasecmp(value, "advanced") == 0)
{
if (doit)
regex_flavor = REG_ADVANCED;
}
else if (strcasecmp(value, "extended") == 0)
{
if (doit)
regex_flavor = REG_EXTENDED;
}
else if (strcasecmp(value, "basic") == 0)
{
if (doit)
regex_flavor = REG_BASIC;
}
else
return NULL; /* fail */
return value; /* OK */
}
/*
* interface routines called by the function manager
*/
@ -229,7 +261,7 @@ nameregexeq(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(RE_compile_and_execute(p,
(unsigned char *) NameStr(*n),
strlen(NameStr(*n)),
REG_ADVANCED,
regex_flavor,
0, NULL));
}
@ -242,7 +274,7 @@ nameregexne(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(!RE_compile_and_execute(p,
(unsigned char *) NameStr(*n),
strlen(NameStr(*n)),
REG_ADVANCED,
regex_flavor,
0, NULL));
}
@ -255,7 +287,7 @@ textregexeq(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(RE_compile_and_execute(p,
(unsigned char *) VARDATA(s),
VARSIZE(s) - VARHDRSZ,
REG_ADVANCED,
regex_flavor,
0, NULL));
}
@ -268,7 +300,7 @@ textregexne(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(!RE_compile_and_execute(p,
(unsigned char *) VARDATA(s),
VARSIZE(s) - VARHDRSZ,
REG_ADVANCED,
regex_flavor,
0, NULL));
}
@ -288,7 +320,7 @@ nameicregexeq(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(RE_compile_and_execute(p,
(unsigned char *) NameStr(*n),
strlen(NameStr(*n)),
REG_ICASE | REG_ADVANCED,
regex_flavor | REG_ICASE,
0, NULL));
}
@ -301,7 +333,7 @@ nameicregexne(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(!RE_compile_and_execute(p,
(unsigned char *) NameStr(*n),
strlen(NameStr(*n)),
REG_ICASE | REG_ADVANCED,
regex_flavor | REG_ICASE,
0, NULL));
}
@ -314,7 +346,7 @@ texticregexeq(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(RE_compile_and_execute(p,
(unsigned char *) VARDATA(s),
VARSIZE(s) - VARHDRSZ,
REG_ICASE | REG_ADVANCED,
regex_flavor | REG_ICASE,
0, NULL));
}
@ -327,7 +359,7 @@ texticregexne(PG_FUNCTION_ARGS)
PG_RETURN_BOOL(!RE_compile_and_execute(p,
(unsigned char *) VARDATA(s),
VARSIZE(s) - VARHDRSZ,
REG_ICASE | REG_ADVANCED,
regex_flavor | REG_ICASE,
0, NULL));
}
@ -353,7 +385,7 @@ textregexsubstr(PG_FUNCTION_ARGS)
match = RE_compile_and_execute(p,
(unsigned char *) VARDATA(s),
VARSIZE(s) - VARHDRSZ,
REG_ADVANCED,
regex_flavor,
2, pmatch);
/* match? then return the substring matching the pattern */