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Commitad17ff9

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Add btree_gist support for searching on "not equals".
Jeff Davis, with slight editorialization by me.
1 parent98c2383 commitad17ff9

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5 files changed

+72
-5
lines changed

5 files changed

+72
-5
lines changed

‎contrib/btree_gist/btree_gist.h‎

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
/*
2-
* $PostgreSQL: pgsql/contrib/btree_gist/btree_gist.h,v 1.9 2009/06/11 14:48:50 momjian Exp $
2+
* $PostgreSQL: pgsql/contrib/btree_gist/btree_gist.h,v 1.10 2010/08/02 16:26:48 rhaas Exp $
33
*/
44
#ifndef__BTREE_GIST_H__
55
#define__BTREE_GIST_H__
@@ -9,6 +9,8 @@
99
#include"access/itup.h"
1010
#include"access/nbtree.h"
1111

12+
#defineBtreeGistNotEqualStrategyNumber 6
13+
1214
/* indexed types */
1315

1416
enumgbtree_type

‎contrib/btree_gist/btree_gist.sql.in‎

Lines changed: 23 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
/* $PostgreSQL: pgsql/contrib/btree_gist/btree_gist.sql.in,v 1.21 2009/06/11 18:30:03 tgl Exp $ */
1+
/* $PostgreSQL: pgsql/contrib/btree_gist/btree_gist.sql.in,v 1.22 2010/08/02 16:26:48 rhaas Exp $ */
22

33
-- Adjust this setting to control where the objects get created.
44
SET search_path = public;
@@ -143,6 +143,7 @@ AS
143143
OPERATOR3= ,
144144
OPERATOR4>= ,
145145
OPERATOR5> ,
146+
OPERATOR6<> ,
146147
FUNCTION1gbt_oid_consistent (internal, oid, int2, oid, internal),
147148
FUNCTION2gbt_oid_union (bytea, internal),
148149
FUNCTION3gbt_oid_compress (internal),
@@ -200,6 +201,7 @@ AS
200201
OPERATOR3= ,
201202
OPERATOR4>= ,
202203
OPERATOR5> ,
204+
OPERATOR6<> ,
203205
FUNCTION1gbt_int2_consistent (internal, int2, int2, oid, internal),
204206
FUNCTION2gbt_int2_union (bytea, internal),
205207
FUNCTION3gbt_int2_compress (internal),
@@ -256,6 +258,7 @@ AS
256258
OPERATOR3= ,
257259
OPERATOR4>= ,
258260
OPERATOR5> ,
261+
OPERATOR6<> ,
259262
FUNCTION1gbt_int4_consistent (internal, int4, int2, oid, internal),
260263
FUNCTION2gbt_int4_union (bytea, internal),
261264
FUNCTION3gbt_int4_compress (internal),
@@ -312,6 +315,7 @@ AS
312315
OPERATOR3= ,
313316
OPERATOR4>= ,
314317
OPERATOR5> ,
318+
OPERATOR6<> ,
315319
FUNCTION1gbt_int8_consistent (internal, int8, int2, oid, internal),
316320
FUNCTION2gbt_int8_union (bytea, internal),
317321
FUNCTION3gbt_int8_compress (internal),
@@ -369,6 +373,7 @@ AS
369373
OPERATOR3= ,
370374
OPERATOR4>= ,
371375
OPERATOR5> ,
376+
OPERATOR6<> ,
372377
FUNCTION1gbt_float4_consistent (internal, float4, int2, oid, internal),
373378
FUNCTION2gbt_float4_union (bytea, internal),
374379
FUNCTION3gbt_float4_compress (internal),
@@ -428,6 +433,7 @@ AS
428433
OPERATOR3= ,
429434
OPERATOR4>= ,
430435
OPERATOR5> ,
436+
OPERATOR6<> ,
431437
FUNCTION1gbt_float8_consistent (internal, float8, int2, oid, internal),
432438
FUNCTION2gbt_float8_union (bytea, internal),
433439
FUNCTION3gbt_float8_compress (internal),
@@ -495,6 +501,7 @@ AS
495501
OPERATOR3= ,
496502
OPERATOR4>= ,
497503
OPERATOR5> ,
504+
OPERATOR6<> ,
498505
FUNCTION1gbt_ts_consistent (internal, timestamp, int2, oid, internal),
499506
FUNCTION2gbt_ts_union (bytea, internal),
500507
FUNCTION3gbt_ts_compress (internal),
@@ -514,6 +521,7 @@ AS
514521
OPERATOR3= ,
515522
OPERATOR4>= ,
516523
OPERATOR5> ,
524+
OPERATOR6<> ,
517525
FUNCTION1gbt_tstz_consistent (internal, timestamptz, int2, oid, internal),
518526
FUNCTION2gbt_ts_union (bytea, internal),
519527
FUNCTION3gbt_tstz_compress (internal),
@@ -581,6 +589,7 @@ AS
581589
OPERATOR3= ,
582590
OPERATOR4>= ,
583591
OPERATOR5> ,
592+
OPERATOR6<> ,
584593
FUNCTION1gbt_time_consistent (internal, time, int2, oid, internal),
585594
FUNCTION2gbt_time_union (bytea, internal),
586595
FUNCTION3gbt_time_compress (internal),
@@ -598,6 +607,7 @@ AS
598607
OPERATOR3= ,
599608
OPERATOR4>= ,
600609
OPERATOR5> ,
610+
OPERATOR6<> ,
601611
FUNCTION1gbt_timetz_consistent (internal, timetz, int2, oid, internal),
602612
FUNCTION2gbt_time_union (bytea, internal),
603613
FUNCTION3gbt_timetz_compress (internal),
@@ -655,6 +665,7 @@ AS
655665
OPERATOR3= ,
656666
OPERATOR4>= ,
657667
OPERATOR5> ,
668+
OPERATOR6<> ,
658669
FUNCTION1gbt_date_consistent (internal, date, int2, oid, internal),
659670
FUNCTION2gbt_date_union (bytea, internal),
660671
FUNCTION3gbt_date_compress (internal),
@@ -717,6 +728,7 @@ AS
717728
OPERATOR3= ,
718729
OPERATOR4>= ,
719730
OPERATOR5> ,
731+
OPERATOR6<> ,
720732
FUNCTION1gbt_intv_consistent (internal, interval, int2, oid, internal),
721733
FUNCTION2gbt_intv_union (bytea, internal),
722734
FUNCTION3gbt_intv_compress (internal),
@@ -773,6 +785,7 @@ AS
773785
OPERATOR3= ,
774786
OPERATOR4>= ,
775787
OPERATOR5> ,
788+
OPERATOR6<> ,
776789
FUNCTION1gbt_cash_consistent (internal, money, int2, oid, internal),
777790
FUNCTION2gbt_cash_union (bytea, internal),
778791
FUNCTION3gbt_cash_compress (internal),
@@ -829,6 +842,7 @@ AS
829842
OPERATOR3= ,
830843
OPERATOR4>= ,
831844
OPERATOR5> ,
845+
OPERATOR6<> ,
832846
FUNCTION1gbt_macad_consistent (internal, macaddr, int2, oid, internal),
833847
FUNCTION2gbt_macad_union (bytea, internal),
834848
FUNCTION3gbt_macad_compress (internal),
@@ -897,6 +911,7 @@ AS
897911
OPERATOR3= ,
898912
OPERATOR4>= ,
899913
OPERATOR5> ,
914+
OPERATOR6<> ,
900915
FUNCTION1gbt_text_consistent (internal, text, int2, oid, internal),
901916
FUNCTION2gbt_text_union (bytea, internal),
902917
FUNCTION3gbt_text_compress (internal),
@@ -916,6 +931,7 @@ AS
916931
OPERATOR3= ,
917932
OPERATOR4>= ,
918933
OPERATOR5> ,
934+
OPERATOR6<> ,
919935
FUNCTION1gbt_bpchar_consistent (internal, bpchar , int2, oid, internal),
920936
FUNCTION2gbt_text_union (bytea, internal),
921937
FUNCTION3gbt_bpchar_compress (internal),
@@ -973,6 +989,7 @@ AS
973989
OPERATOR3= ,
974990
OPERATOR4>= ,
975991
OPERATOR5> ,
992+
OPERATOR6<> ,
976993
FUNCTION1gbt_bytea_consistent (internal, bytea, int2, oid, internal),
977994
FUNCTION2gbt_bytea_union (bytea, internal),
978995
FUNCTION3gbt_bytea_compress (internal),
@@ -1030,6 +1047,7 @@ AS
10301047
OPERATOR3= ,
10311048
OPERATOR4>= ,
10321049
OPERATOR5> ,
1050+
OPERATOR6<> ,
10331051
FUNCTION1gbt_numeric_consistent (internal, numeric, int2, oid, internal),
10341052
FUNCTION2gbt_numeric_union (bytea, internal),
10351053
FUNCTION3gbt_numeric_compress (internal),
@@ -1085,6 +1103,7 @@ AS
10851103
OPERATOR3= ,
10861104
OPERATOR4>= ,
10871105
OPERATOR5> ,
1106+
OPERATOR6<> ,
10881107
FUNCTION1gbt_bit_consistent (internal, bit, int2, oid, internal),
10891108
FUNCTION2gbt_bit_union (bytea, internal),
10901109
FUNCTION3gbt_bit_compress (internal),
@@ -1104,6 +1123,7 @@ AS
11041123
OPERATOR3= ,
11051124
OPERATOR4>= ,
11061125
OPERATOR5> ,
1126+
OPERATOR6<> ,
11071127
FUNCTION1gbt_bit_consistent (internal, bit, int2, oid, internal),
11081128
FUNCTION2gbt_bit_union (bytea, internal),
11091129
FUNCTION3gbt_bit_compress (internal),
@@ -1162,6 +1182,7 @@ AS
11621182
OPERATOR3= ,
11631183
OPERATOR4>= ,
11641184
OPERATOR5> ,
1185+
OPERATOR6<> ,
11651186
FUNCTION1gbt_inet_consistent (internal, inet, int2, oid, internal),
11661187
FUNCTION2gbt_inet_union (bytea, internal),
11671188
FUNCTION3gbt_inet_compress (internal),
@@ -1180,6 +1201,7 @@ AS
11801201
OPERATOR3= (inet, inet) ,
11811202
OPERATOR4>= (inet, inet) ,
11821203
OPERATOR5> (inet, inet) ,
1204+
OPERATOR6<> (inet, inet) ,
11831205
FUNCTION1gbt_inet_consistent (internal, inet, int2, oid, internal),
11841206
FUNCTION2gbt_inet_union (bytea, internal),
11851207
FUNCTION3gbt_inet_compress (internal),

‎contrib/btree_gist/btree_utils_num.c‎

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
/*
2-
* $PostgreSQL: pgsql/contrib/btree_gist/btree_utils_num.c,v 1.12 2009/06/11 14:48:50 momjian Exp $
2+
* $PostgreSQL: pgsql/contrib/btree_gist/btree_utils_num.c,v 1.13 2010/08/02 16:26:48 rhaas Exp $
33
*/
44
#include"btree_gist.h"
55
#include"btree_utils_num.h"
@@ -225,6 +225,10 @@ gbt_num_consistent(
225225
caseBTGreaterEqualStrategyNumber:
226226
retval= (*tinfo->f_le) (query,key->upper);
227227
break;
228+
caseBtreeGistNotEqualStrategyNumber:
229+
retval= ! ((*tinfo->f_eq) (query,key->lower)&&
230+
(*tinfo->f_eq) (query,key->upper));
231+
break;
228232
default:
229233
retval= FALSE;
230234
}

‎contrib/btree_gist/btree_utils_var.c‎

Lines changed: 4 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
/*
2-
* $PostgreSQL: pgsql/contrib/btree_gist/btree_utils_var.c,v 1.23 2010/02/26 02:00:32 momjian Exp $
2+
* $PostgreSQL: pgsql/contrib/btree_gist/btree_utils_var.c,v 1.24 2010/08/02 16:26:48 rhaas Exp $
33
*/
44
#include"btree_gist.h"
55

@@ -596,6 +596,9 @@ gbt_var_consistent(
596596
retval= (*tinfo->f_cmp) ((bytea*)query,key->upper) <=0
597597
||gbt_var_node_pf_match(key,query,tinfo);
598598
break;
599+
caseBtreeGistNotEqualStrategyNumber:
600+
retval= ! ((*tinfo->f_eq) (query,key->lower)&& (*tinfo->f_eq) (query,key->upper));
601+
break;
599602
default:
600603
retval= FALSE;
601604
}

‎doc/src/sgml/btree-gist.sgml‎

Lines changed: 37 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,4 @@
1-
<!-- $PostgreSQL: pgsql/doc/src/sgml/btree-gist.sgml,v 1.5 2010/03/17 17:12:31 petere Exp $ -->
1+
<!-- $PostgreSQL: pgsql/doc/src/sgml/btree-gist.sgml,v 1.6 2010/08/02 16:26:48 rhaas Exp $ -->
22

33
<sect1 id="btree-gist">
44
<title>btree_gist</title>
@@ -27,15 +27,51 @@
2727
GiST operator classes.
2828
</para>
2929

30+
<para>
31+
In addition to the typical btree search operators, btree_gist also
32+
provides search operators for <literal>&lt;&gt;</literal> ("not
33+
equals"). This may be useful in combination with an
34+
<link linkend="SQL-CREATETABLE-EXCLUDE">Exclusion Constraint</link>,
35+
as descibed below.
36+
</para>
37+
3038
<sect2>
3139
<title>Example usage</title>
3240

41+
<para>
42+
Simple example using btree_gist instead of btree:
43+
</para>
44+
3345
<programlisting>
3446
CREATE TABLE test (a int4);
3547
-- create index
3648
CREATE INDEX testidx ON test USING gist (a);
3749
-- query
3850
SELECT * FROM test WHERE a &lt; 10;
51+
</programlisting>
52+
53+
<para>
54+
Example using an <link linkend="SQL-CREATETABLE-EXCLUDE">Exclusion
55+
Constraint</link> to enforce the constraint that a cage at a zoo
56+
can contain only one kind of animal:
57+
</para>
58+
59+
<programlisting>
60+
=> CREATE TABLE zoo (
61+
cage INTEGER,
62+
animal TEXT,
63+
EXCLUDE USING gist (cage WITH =, animal WITH <>)
64+
);
65+
66+
=> INSERT INTO zoo VALUES(123, 'zebra');
67+
INSERT 0 1
68+
=> INSERT INTO zoo VALUES(123, 'zebra');
69+
INSERT 0 1
70+
=> INSERT INTO zoo VALUES(123, 'lion');
71+
ERROR: conflicting key value violates exclusion constraint "zoo_cage_animal_excl"
72+
DETAIL: Key (cage, animal)=(123, lion) conflicts with existing key (cage, animal)=(123, zebra).
73+
=> INSERT INTO zoo VALUES(124, 'lion');
74+
INSERT 0 1
3975
</programlisting>
4076

4177
</sect2>

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