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Fix regex, LIKE, and some other second-rank text-manipulation functions

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to not cause needless copying of text datums that have 1-byte headers.
Greg Stark, in response to performance gripe from Guillaume Smet and
ITAGAKI Takahiro.
This commit is contained in:
Tom Lane
2007-09-21 22:52:52 +00:00
parent cc59049daf
commit 7583f9a7ca
6 changed files with 212 additions and 192 deletions
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83
src/backend/utils/adt/like.c
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@ -11,7 +11,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/like.c,v 1.69 2007/06/02 02:03:42 adunstan Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/like.c,v 1.70 2007/09/21 22:52:52 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -135,6 +135,7 @@ Generic_Text_IC_like(text *str, text *pat)
/* Force inputs to lower case to achieve case insensitivity */
str = DatumGetTextP(DirectFunctionCall1(lower, PointerGetDatum(str)));
pat = DatumGetTextP(DirectFunctionCall1(lower, PointerGetDatum(pat)));
/* lower's result is never packed, so OK to use old macros here */
s = VARDATA(str);
slen = (VARSIZE(str) - VARHDRSZ);
p = VARDATA(pat);
@ -151,7 +152,7 @@ Datum
namelike(PG_FUNCTION_ARGS)
{
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
char *s,
*p;
@ -160,8 +161,8 @@ namelike(PG_FUNCTION_ARGS)
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat) - VARHDRSZ);
p = VARDATA_ANY(pat);
plen = VARSIZE_ANY_EXHDR(pat);
result = (GenericMatchText(s, slen, p, plen) == LIKE_TRUE);
@ -172,7 +173,7 @@ Datum
namenlike(PG_FUNCTION_ARGS)
{
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
char *s,
*p;
@ -181,8 +182,8 @@ namenlike(PG_FUNCTION_ARGS)
s = NameStr(*str);
slen = strlen(s);
p = VARDATA(pat);
plen = (VARSIZE(pat) - VARHDRSZ);
p = VARDATA_ANY(pat);
plen = VARSIZE_ANY_EXHDR(pat);
result = (GenericMatchText(s, slen, p, plen) != LIKE_TRUE);
@ -192,18 +193,18 @@ namenlike(PG_FUNCTION_ARGS)
Datum
textlike(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
text *str = PG_GETARG_TEXT_PP(0);
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
char *s,
*p;
int slen,
plen;
s = VARDATA(str);
slen = (VARSIZE(str) - VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat) - VARHDRSZ);
s = VARDATA_ANY(str);
slen = VARSIZE_ANY_EXHDR(str);
p = VARDATA_ANY(pat);
plen = VARSIZE_ANY_EXHDR(pat);
result = (GenericMatchText(s, slen, p, plen) == LIKE_TRUE);
@ -213,18 +214,18 @@ textlike(PG_FUNCTION_ARGS)
Datum
textnlike(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
text *str = PG_GETARG_TEXT_PP(0);
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
char *s,
*p;
int slen,
plen;
s = VARDATA(str);
slen = (VARSIZE(str) - VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat) - VARHDRSZ);
s = VARDATA_ANY(str);
slen = VARSIZE_ANY_EXHDR(str);
p = VARDATA_ANY(pat);
plen = VARSIZE_ANY_EXHDR(pat);
result = (GenericMatchText(s, slen, p, plen) != LIKE_TRUE);
@ -234,18 +235,18 @@ textnlike(PG_FUNCTION_ARGS)
Datum
bytealike(PG_FUNCTION_ARGS)
{
bytea *str = PG_GETARG_BYTEA_P(0);
bytea *pat = PG_GETARG_BYTEA_P(1);
bytea *str = PG_GETARG_BYTEA_PP(0);
bytea *pat = PG_GETARG_BYTEA_PP(1);
bool result;
char *s,
*p;
int slen,
plen;
s = VARDATA(str);
slen = (VARSIZE(str) - VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat) - VARHDRSZ);
s = VARDATA_ANY(str);
slen = VARSIZE_ANY_EXHDR(str);
p = VARDATA_ANY(pat);
plen = VARSIZE_ANY_EXHDR(pat);
result = (SB_MatchText(s, slen, p, plen) == LIKE_TRUE);
@ -255,18 +256,18 @@ bytealike(PG_FUNCTION_ARGS)
Datum
byteanlike(PG_FUNCTION_ARGS)
{
bytea *str = PG_GETARG_BYTEA_P(0);
bytea *pat = PG_GETARG_BYTEA_P(1);
bytea *str = PG_GETARG_BYTEA_PP(0);
bytea *pat = PG_GETARG_BYTEA_PP(1);
bool result;
char *s,
*p;
int slen,
plen;
s = VARDATA(str);
slen = (VARSIZE(str) - VARHDRSZ);
p = VARDATA(pat);
plen = (VARSIZE(pat) - VARHDRSZ);
s = VARDATA_ANY(str);
slen = VARSIZE_ANY_EXHDR(str);
p = VARDATA_ANY(pat);
plen = VARSIZE_ANY_EXHDR(pat);
result = (SB_MatchText(s, slen, p, plen) != LIKE_TRUE);
@ -281,7 +282,7 @@ Datum
nameiclike(PG_FUNCTION_ARGS)
{
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
text *strtext;
@ -296,7 +297,7 @@ Datum
nameicnlike(PG_FUNCTION_ARGS)
{
Name str = PG_GETARG_NAME(0);
text *pat = PG_GETARG_TEXT_P(1);
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
text *strtext;
@ -310,8 +311,8 @@ nameicnlike(PG_FUNCTION_ARGS)
Datum
texticlike(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
text *str = PG_GETARG_TEXT_PP(0);
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
result = (Generic_Text_IC_like(str, pat) == LIKE_TRUE);
@ -322,8 +323,8 @@ texticlike(PG_FUNCTION_ARGS)
Datum
texticnlike(PG_FUNCTION_ARGS)
{
text *str = PG_GETARG_TEXT_P(0);
text *pat = PG_GETARG_TEXT_P(1);
text *str = PG_GETARG_TEXT_PP(0);
text *pat = PG_GETARG_TEXT_PP(1);
bool result;
result = (Generic_Text_IC_like(str, pat) != LIKE_TRUE);
@ -338,8 +339,8 @@ texticnlike(PG_FUNCTION_ARGS)
Datum
like_escape(PG_FUNCTION_ARGS)
{
text *pat = PG_GETARG_TEXT_P(0);
text *esc = PG_GETARG_TEXT_P(1);
text *pat = PG_GETARG_TEXT_PP(0);
text *esc = PG_GETARG_TEXT_PP(1);
text *result;
if (pg_database_encoding_max_length() == 1)
@ -357,8 +358,8 @@ like_escape(PG_FUNCTION_ARGS)
Datum
like_escape_bytea(PG_FUNCTION_ARGS)
{
bytea *pat = PG_GETARG_BYTEA_P(0);
bytea *esc = PG_GETARG_BYTEA_P(1);
bytea *pat = PG_GETARG_BYTEA_PP(0);
bytea *esc = PG_GETARG_BYTEA_PP(1);
bytea *result = SB_do_like_escape((text *)pat, (text *)esc);
PG_RETURN_BYTEA_P((bytea *)result);