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tglsfdctglsfdc
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Make contrib/pg_trgm also support regex searches with GiST indexes.
This wasn't addressed in the original patch, but it doesn't take very much additional code to cover the case, so let's get it done. Since pg_trgm 1.1 hasn't been released yet, I just changed the definition of what's in it, rather than inventing a 1.2.
1 parent e543631 commit 6f5b8be

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10 files changed

+352
-35
lines changed

10 files changed

+352
-35
lines changed

‎contrib/pg_trgm/expected/pg_trgm.out

+132
Original file line numberDiff line numberDiff line change
@@ -3706,3 +3706,135 @@ select * from test2 where t ilike 'qua%';
37063706
quark
37073707
(1 row)
37083708

3709+
select * from test2 where t like '%z foo bar%';
3710+
t
3711+
-------------
3712+
z foo bar
3713+
(1 row)
3714+
3715+
select * from test2 where t like ' z foo%';
3716+
t
3717+
-------------
3718+
z foo bar
3719+
(1 row)
3720+
3721+
explain (costs off)
3722+
select * from test2 where t ~ '[abc]{3}';
3723+
QUERY PLAN
3724+
------------------------------------------
3725+
Index Scan using test2_idx_gist on test2
3726+
Index Cond: (t ~ '[abc]{3}'::text)
3727+
(2 rows)
3728+
3729+
explain (costs off)
3730+
select * from test2 where t ~* 'DEF';
3731+
QUERY PLAN
3732+
------------------------------------------
3733+
Index Scan using test2_idx_gist on test2
3734+
Index Cond: (t ~* 'DEF'::text)
3735+
(2 rows)
3736+
3737+
select * from test2 where t ~ '[abc]{3}';
3738+
t
3739+
--------
3740+
abcdef
3741+
(1 row)
3742+
3743+
select * from test2 where t ~ 'a[bc]+d';
3744+
t
3745+
--------
3746+
abcdef
3747+
(1 row)
3748+
3749+
select * from test2 where t ~ '(abc)*$';
3750+
t
3751+
-------------
3752+
abcdef
3753+
quark
3754+
z foo bar
3755+
(3 rows)
3756+
3757+
select * from test2 where t ~* 'DEF';
3758+
t
3759+
--------
3760+
abcdef
3761+
(1 row)
3762+
3763+
select * from test2 where t ~ 'dEf';
3764+
t
3765+
---
3766+
(0 rows)
3767+
3768+
select * from test2 where t ~* '^q';
3769+
t
3770+
-------
3771+
quark
3772+
(1 row)
3773+
3774+
select * from test2 where t ~* '[abc]{3}[def]{3}';
3775+
t
3776+
--------
3777+
abcdef
3778+
(1 row)
3779+
3780+
select * from test2 where t ~* 'ab[a-z]{3}';
3781+
t
3782+
--------
3783+
abcdef
3784+
(1 row)
3785+
3786+
select * from test2 where t ~* '(^| )qua';
3787+
t
3788+
-------
3789+
quark
3790+
(1 row)
3791+
3792+
select * from test2 where t ~ 'q.*rk$';
3793+
t
3794+
-------
3795+
quark
3796+
(1 row)
3797+
3798+
select * from test2 where t ~ 'q';
3799+
t
3800+
-------
3801+
quark
3802+
(1 row)
3803+
3804+
select * from test2 where t ~ '[a-z]{3}';
3805+
t
3806+
-------------
3807+
abcdef
3808+
quark
3809+
z foo bar
3810+
(3 rows)
3811+
3812+
select * from test2 where t ~* '(a{10}|b{10}|c{10}){10}';
3813+
t
3814+
---
3815+
(0 rows)
3816+
3817+
select * from test2 where t ~ 'z foo bar';
3818+
t
3819+
-------------
3820+
z foo bar
3821+
(1 row)
3822+
3823+
select * from test2 where t ~ ' z foo bar';
3824+
t
3825+
-------------
3826+
z foo bar
3827+
(1 row)
3828+
3829+
select * from test2 where t ~ ' z foo bar';
3830+
t
3831+
-------------
3832+
z foo bar
3833+
(1 row)
3834+
3835+
select * from test2 where t ~ ' z foo';
3836+
t
3837+
-------------
3838+
z foo bar
3839+
(1 row)
3840+

‎contrib/pg_trgm/pg_trgm--1.0--1.1.sql

+4
Original file line numberDiff line numberDiff line change
@@ -3,6 +3,10 @@
33
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
44
\echo Use "ALTER EXTENSION pg_trgm UPDATE TO '1.1'" to load this file. \quit
55

6+
ALTER OPERATOR FAMILY gist_trgm_ops USING gist ADD
7+
OPERATOR 5 pg_catalog.~ (text, text),
8+
OPERATOR 6 pg_catalog.~* (text, text);
9+
610
ALTER OPERATOR FAMILY gin_trgm_ops USING gin ADD
711
OPERATOR 5 pg_catalog.~ (text, text),
812
OPERATOR 6 pg_catalog.~* (text, text);

‎contrib/pg_trgm/pg_trgm--1.1.sql

+6
Original file line numberDiff line numberDiff line change
@@ -132,6 +132,12 @@ ALTER OPERATOR FAMILY gist_trgm_ops USING gist ADD
132132
OPERATOR 4 pg_catalog.~~* (text, text),
133133
FUNCTION 8 (text, text) gtrgm_distance (internal, text, int, oid);
134134

135+
-- Add operators that are new in 9.3.
136+
137+
ALTER OPERATOR FAMILY gist_trgm_ops USING gist ADD
138+
OPERATOR 5 pg_catalog.~ (text, text),
139+
OPERATOR 6 pg_catalog.~* (text, text);
140+
135141
-- support functions for gin
136142
CREATE FUNCTION gin_extract_value_trgm(text, internal)
137143
RETURNS internal

‎contrib/pg_trgm/sql/pg_trgm.sql

+23
Original file line numberDiff line numberDiff line change
@@ -90,3 +90,26 @@ select * from test2 where t like '%bcd%';
9090
select * from test2 where t like E'%\\bcd%';
9191
select * from test2 where t ilike '%BCD%';
9292
select * from test2 where t ilike 'qua%';
93+
select * from test2 where t like '%z foo bar%';
94+
select * from test2 where t like ' z foo%';
95+
explain (costs off)
96+
select * from test2 where t ~ '[abc]{3}';
97+
explain (costs off)
98+
select * from test2 where t ~* 'DEF';
99+
select * from test2 where t ~ '[abc]{3}';
100+
select * from test2 where t ~ 'a[bc]+d';
101+
select * from test2 where t ~ '(abc)*$';
102+
select * from test2 where t ~* 'DEF';
103+
select * from test2 where t ~ 'dEf';
104+
select * from test2 where t ~* '^q';
105+
select * from test2 where t ~* '[abc]{3}[def]{3}';
106+
select * from test2 where t ~* 'ab[a-z]{3}';
107+
select * from test2 where t ~* '(^| )qua';
108+
select * from test2 where t ~ 'q.*rk$';
109+
select * from test2 where t ~ 'q';
110+
select * from test2 where t ~ '[a-z]{3}';
111+
select * from test2 where t ~* '(a{10}|b{10}|c{10}){10}';
112+
select * from test2 where t ~ 'z foo bar';
113+
select * from test2 where t ~ ' z foo bar';
114+
select * from test2 where t ~ ' z foo bar';
115+
select * from test2 where t ~ ' z foo';

‎contrib/pg_trgm/trgm.h

+3-2
Original file line numberDiff line numberDiff line change
@@ -113,8 +113,9 @@ extern TRGM *generate_trgm(char *str, int slen);
113113
extern TRGM *generate_wildcard_trgm(const char *str, int slen);
114114
extern float4 cnt_sml(TRGM *trg1, TRGM *trg2);
115115
extern bool trgm_contained_by(TRGM *trg1, TRGM *trg2);
116-
extern TRGM *createTrgmNFA(text *text_re, TrgmPackedGraph **graph,
117-
Oid collation);
116+
extern bool *trgm_presence_map(TRGM *query, TRGM *key);
117+
extern TRGM *createTrgmNFA(text *text_re, Oid collation,
118+
TrgmPackedGraph **graph, MemoryContext rcontext);
118119
extern bool trigramsMatchGraph(TrgmPackedGraph *graph, bool *check);
119120

120121
#endif /* __TRGM_H__ */

‎contrib/pg_trgm/trgm_gin.c

+2-1
Original file line numberDiff line numberDiff line change
@@ -115,7 +115,8 @@ gin_extract_query_trgm(PG_FUNCTION_ARGS)
115115
#endif
116116
/* FALL THRU */
117117
case RegExpStrategyNumber:
118-
trg = createTrgmNFA(val, &graph, PG_GET_COLLATION());
118+
trg = createTrgmNFA(val, PG_GET_COLLATION(),
119+
&graph, CurrentMemoryContext);
119120
if (trg && ARRNELEM(trg) > 0)
120121
{
121122
/*

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