Add btree_gist support for searching on "not equals".
Jeff Davis, with slight editorialization by me.
This commit is contained in:
Robert Haas
parent
98c2383ba5
commit
ad17ff95cf
@ -1,5 +1,5 @@
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/*
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* $PostgreSQL: pgsql/contrib/btree_gist/btree_gist.h,v 1.9 2009/06/11 14:48:50 momjian Exp $
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* $PostgreSQL: pgsql/contrib/btree_gist/btree_gist.h,v 1.10 2010/08/02 16:26:48 rhaas Exp $
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*/
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#ifndef __BTREE_GIST_H__
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#define __BTREE_GIST_H__
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@ -9,6 +9,8 @@
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#include "access/itup.h"
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#include "access/nbtree.h"
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#define BtreeGistNotEqualStrategyNumber 6
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/* indexed types */
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enum gbtree_type
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@ -1,4 +1,4 @@
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/* $PostgreSQL: pgsql/contrib/btree_gist/btree_gist.sql.in,v 1.21 2009/06/11 18:30:03 tgl Exp $ */
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/* $PostgreSQL: pgsql/contrib/btree_gist/btree_gist.sql.in,v 1.22 2010/08/02 16:26:48 rhaas Exp $ */
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-- Adjust this setting to control where the objects get created.
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SET search_path = public;
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@ -143,6 +143,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_oid_consistent (internal, oid, int2, oid, internal),
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FUNCTION 2 gbt_oid_union (bytea, internal),
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FUNCTION 3 gbt_oid_compress (internal),
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@ -200,6 +201,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_int2_consistent (internal, int2, int2, oid, internal),
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FUNCTION 2 gbt_int2_union (bytea, internal),
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FUNCTION 3 gbt_int2_compress (internal),
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@ -256,6 +258,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_int4_consistent (internal, int4, int2, oid, internal),
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FUNCTION 2 gbt_int4_union (bytea, internal),
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FUNCTION 3 gbt_int4_compress (internal),
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@ -312,6 +315,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_int8_consistent (internal, int8, int2, oid, internal),
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FUNCTION 2 gbt_int8_union (bytea, internal),
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FUNCTION 3 gbt_int8_compress (internal),
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@ -369,6 +373,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_float4_consistent (internal, float4, int2, oid, internal),
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FUNCTION 2 gbt_float4_union (bytea, internal),
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FUNCTION 3 gbt_float4_compress (internal),
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@ -428,6 +433,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_float8_consistent (internal, float8, int2, oid, internal),
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FUNCTION 2 gbt_float8_union (bytea, internal),
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FUNCTION 3 gbt_float8_compress (internal),
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@ -495,6 +501,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_ts_consistent (internal, timestamp, int2, oid, internal),
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FUNCTION 2 gbt_ts_union (bytea, internal),
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FUNCTION 3 gbt_ts_compress (internal),
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@ -514,6 +521,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_tstz_consistent (internal, timestamptz, int2, oid, internal),
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FUNCTION 2 gbt_ts_union (bytea, internal),
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FUNCTION 3 gbt_tstz_compress (internal),
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@ -581,6 +589,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_time_consistent (internal, time, int2, oid, internal),
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FUNCTION 2 gbt_time_union (bytea, internal),
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FUNCTION 3 gbt_time_compress (internal),
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@ -598,6 +607,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_timetz_consistent (internal, timetz, int2, oid, internal),
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FUNCTION 2 gbt_time_union (bytea, internal),
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FUNCTION 3 gbt_timetz_compress (internal),
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@ -655,6 +665,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_date_consistent (internal, date, int2, oid, internal),
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FUNCTION 2 gbt_date_union (bytea, internal),
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FUNCTION 3 gbt_date_compress (internal),
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@ -717,6 +728,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_intv_consistent (internal, interval, int2, oid, internal),
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FUNCTION 2 gbt_intv_union (bytea, internal),
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FUNCTION 3 gbt_intv_compress (internal),
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@ -773,6 +785,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_cash_consistent (internal, money, int2, oid, internal),
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FUNCTION 2 gbt_cash_union (bytea, internal),
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FUNCTION 3 gbt_cash_compress (internal),
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@ -829,6 +842,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_macad_consistent (internal, macaddr, int2, oid, internal),
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FUNCTION 2 gbt_macad_union (bytea, internal),
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FUNCTION 3 gbt_macad_compress (internal),
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@ -897,6 +911,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_text_consistent (internal, text, int2, oid, internal),
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FUNCTION 2 gbt_text_union (bytea, internal),
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FUNCTION 3 gbt_text_compress (internal),
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@ -916,6 +931,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_bpchar_consistent (internal, bpchar , int2, oid, internal),
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FUNCTION 2 gbt_text_union (bytea, internal),
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FUNCTION 3 gbt_bpchar_compress (internal),
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@ -973,6 +989,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_bytea_consistent (internal, bytea, int2, oid, internal),
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FUNCTION 2 gbt_bytea_union (bytea, internal),
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FUNCTION 3 gbt_bytea_compress (internal),
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@ -1030,6 +1047,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_numeric_consistent (internal, numeric, int2, oid, internal),
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FUNCTION 2 gbt_numeric_union (bytea, internal),
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FUNCTION 3 gbt_numeric_compress (internal),
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@ -1085,6 +1103,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_bit_consistent (internal, bit, int2, oid, internal),
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FUNCTION 2 gbt_bit_union (bytea, internal),
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FUNCTION 3 gbt_bit_compress (internal),
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@ -1104,6 +1123,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_bit_consistent (internal, bit, int2, oid, internal),
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FUNCTION 2 gbt_bit_union (bytea, internal),
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FUNCTION 3 gbt_bit_compress (internal),
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@ -1162,6 +1182,7 @@ AS
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OPERATOR 3 = ,
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OPERATOR 4 >= ,
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OPERATOR 5 > ,
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OPERATOR 6 <> ,
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FUNCTION 1 gbt_inet_consistent (internal, inet, int2, oid, internal),
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FUNCTION 2 gbt_inet_union (bytea, internal),
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FUNCTION 3 gbt_inet_compress (internal),
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@ -1180,6 +1201,7 @@ AS
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OPERATOR 3 = (inet, inet) ,
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OPERATOR 4 >= (inet, inet) ,
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OPERATOR 5 > (inet, inet) ,
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OPERATOR 6 <> (inet, inet) ,
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FUNCTION 1 gbt_inet_consistent (internal, inet, int2, oid, internal),
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FUNCTION 2 gbt_inet_union (bytea, internal),
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FUNCTION 3 gbt_inet_compress (internal),
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@ -1,5 +1,5 @@
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/*
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* $PostgreSQL: pgsql/contrib/btree_gist/btree_utils_num.c,v 1.12 2009/06/11 14:48:50 momjian Exp $
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* $PostgreSQL: pgsql/contrib/btree_gist/btree_utils_num.c,v 1.13 2010/08/02 16:26:48 rhaas Exp $
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*/
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#include "btree_gist.h"
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#include "btree_utils_num.h"
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@ -225,6 +225,10 @@ gbt_num_consistent(
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case BTGreaterEqualStrategyNumber:
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retval = (*tinfo->f_le) (query, key->upper);
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break;
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case BtreeGistNotEqualStrategyNumber:
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retval = ! ((*tinfo->f_eq) (query, key->lower) &&
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(*tinfo->f_eq) (query, key->upper));
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break;
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default:
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retval = FALSE;
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}
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@ -1,5 +1,5 @@
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/*
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* $PostgreSQL: pgsql/contrib/btree_gist/btree_utils_var.c,v 1.23 2010/02/26 02:00:32 momjian Exp $
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* $PostgreSQL: pgsql/contrib/btree_gist/btree_utils_var.c,v 1.24 2010/08/02 16:26:48 rhaas Exp $
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*/
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#include "btree_gist.h"
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@ -596,6 +596,9 @@ gbt_var_consistent(
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retval = (*tinfo->f_cmp) ((bytea *) query, key->upper) <= 0
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|| gbt_var_node_pf_match(key, query, tinfo);
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break;
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case BtreeGistNotEqualStrategyNumber:
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retval = ! ((*tinfo->f_eq) (query, key->lower) && (*tinfo->f_eq) (query, key->upper));
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break;
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default:
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retval = FALSE;
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}
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/btree-gist.sgml,v 1.5 2010/03/17 17:12:31 petere Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/btree-gist.sgml,v 1.6 2010/08/02 16:26:48 rhaas Exp $ -->
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<sect1 id="btree-gist">
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<title>btree_gist</title>
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@ -27,15 +27,51 @@
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GiST operator classes.
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</para>
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<para>
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In addition to the typical btree search operators, btree_gist also
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provides search operators for <literal><></literal> ("not
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equals"). This may be useful in combination with an
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<link linkend="SQL-CREATETABLE-EXCLUDE">Exclusion Constraint</link>,
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as descibed below.
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</para>
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<sect2>
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<title>Example usage</title>
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<para>
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Simple example using btree_gist instead of btree:
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</para>
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<programlisting>
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CREATE TABLE test (a int4);
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-- create index
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CREATE INDEX testidx ON test USING gist (a);
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-- query
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SELECT * FROM test WHERE a < 10;
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</programlisting>
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<para>
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Example using an <link linkend="SQL-CREATETABLE-EXCLUDE">Exclusion
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Constraint</link> to enforce the constraint that a cage at a zoo
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can contain only one kind of animal:
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</para>
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<programlisting>
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=> CREATE TABLE zoo (
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cage INTEGER,
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animal TEXT,
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EXCLUDE USING gist (cage WITH =, animal WITH <>)
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);
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=> INSERT INTO zoo VALUES(123, 'zebra');
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INSERT 0 1
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=> INSERT INTO zoo VALUES(123, 'zebra');
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INSERT 0 1
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=> INSERT INTO zoo VALUES(123, 'lion');
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ERROR: conflicting key value violates exclusion constraint "zoo_cage_animal_excl"
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DETAIL: Key (cage, animal)=(123, lion) conflicts with existing key (cage, animal)=(123, zebra).
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=> INSERT INTO zoo VALUES(124, 'lion');
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INSERT 0 1
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</programlisting>
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</sect2>
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