Add index-only scan support to btree_gist.

inet, cidr, and timetz indexes still cannot support index-only scans,
because they don't store the original unmodified value in the index, but a
derived approximate value.

contrib/btree_gist/Makefile

@@ -9,7 +9,8 @@ OBJS =  btree_gist.o btree_utils_num.o btree_utils_var.o btree_int2.o \
         btree_numeric.o $(WIN32RES)
 
 EXTENSION = btree_gist
-DATA = btree_gist--1.0.sql btree_gist--unpackaged--1.0.sql
+DATA = btree_gist--1.1.sql btree_gist--unpackaged--1.0.sql \
+	btree_gist--1.0--1.1.sql
 PGFILEDESC = "btree_gist - B-tree equivalent GIST operator classes"
 
 REGRESS = init int2 int4 int8 float4 float8 cash oid timestamp timestamptz \

contrib/btree_gist/btree_cash.c

@@ -17,6 +17,7 @@ typedef struct
 ** Cash ops
 */
 PG_FUNCTION_INFO_V1(gbt_cash_compress);
+PG_FUNCTION_INFO_V1(gbt_cash_fetch);
 PG_FUNCTION_INFO_V1(gbt_cash_union);
 PG_FUNCTION_INFO_V1(gbt_cash_picksplit);
 PG_FUNCTION_INFO_V1(gbt_cash_consistent);
@@ -123,6 +124,13 @@ gbt_cash_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_cash_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_cash_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_date.c

@@ -17,6 +17,7 @@ typedef struct
 ** date ops
 */
 PG_FUNCTION_INFO_V1(gbt_date_compress);
+PG_FUNCTION_INFO_V1(gbt_date_fetch);
 PG_FUNCTION_INFO_V1(gbt_date_union);
 PG_FUNCTION_INFO_V1(gbt_date_picksplit);
 PG_FUNCTION_INFO_V1(gbt_date_consistent);
@@ -134,7 +135,13 @@ gbt_date_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_date_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
 
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_date_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_float4.c

@@ -16,6 +16,7 @@ typedef struct float4key
 ** float4 ops
 */
 PG_FUNCTION_INFO_V1(gbt_float4_compress);
+PG_FUNCTION_INFO_V1(gbt_float4_fetch);
 PG_FUNCTION_INFO_V1(gbt_float4_union);
 PG_FUNCTION_INFO_V1(gbt_float4_picksplit);
 PG_FUNCTION_INFO_V1(gbt_float4_consistent);
@@ -116,6 +117,13 @@ gbt_float4_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_float4_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_float4_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_float8.c

@@ -16,6 +16,7 @@ typedef struct float8key
 ** float8 ops
 */
 PG_FUNCTION_INFO_V1(gbt_float8_compress);
+PG_FUNCTION_INFO_V1(gbt_float8_fetch);
 PG_FUNCTION_INFO_V1(gbt_float8_union);
 PG_FUNCTION_INFO_V1(gbt_float8_picksplit);
 PG_FUNCTION_INFO_V1(gbt_float8_consistent);
@@ -123,6 +124,13 @@ gbt_float8_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_float8_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_float8_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_gist--1.0--1.1.sql

@@ -0,0 +1,127 @@
+/* contrib/btree_gist/btree_gist--1.0--1.1.sql */
+
+-- complain if script is sourced in psql, rather than via CREATE EXTENSION
+\echo Use "ALTER EXTENSION btree_gist UPDATE TO '1.1'" to load this file. \quit
+
+-- Index-only scan support new in 9.5.
+CREATE FUNCTION gbt_oid_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_int2_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_int4_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_int8_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_float4_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_float8_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_ts_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_time_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_date_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_intv_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_cash_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_macad_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+CREATE FUNCTION gbt_var_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
+ALTER OPERATOR FAMILY gist_oid_ops USING gist ADD
+	FUNCTION	9 (oid, oid) gbt_oid_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_int2_ops USING gist ADD
+	FUNCTION	9 (int2, int2) gbt_int2_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_int4_ops USING gist ADD
+	FUNCTION	9 (int4, int4) gbt_int4_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_int8_ops USING gist ADD
+	FUNCTION	9 (int8, int8) gbt_int8_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_float4_ops USING gist ADD
+	FUNCTION	9 (float4, float4) gbt_float4_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_float8_ops USING gist ADD
+	FUNCTION	9 (float8, float8) gbt_float8_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_timestamp_ops USING gist ADD
+	FUNCTION	9 (timestamp, timestamp) gbt_ts_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_timestamptz_ops USING gist ADD
+	FUNCTION	9 (timestamptz, timestamptz) gbt_ts_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_time_ops USING gist ADD
+	FUNCTION	9 (time, time) gbt_time_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_date_ops USING gist ADD
+	FUNCTION	9 (date, date) gbt_date_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_interval_ops USING gist ADD
+	FUNCTION	9 (interval, interval) gbt_intv_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_cash_ops USING gist ADD
+	FUNCTION	9 (money, money) gbt_cash_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_macaddr_ops USING gist ADD
+	FUNCTION	9 (macaddr, macaddr) gbt_macad_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_text_ops USING gist ADD
+	FUNCTION	9 (text, text) gbt_var_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_bpchar_ops USING gist ADD
+	FUNCTION	9 (bpchar, bpchar) gbt_var_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_bytea_ops USING gist ADD
+	FUNCTION	9 (bytea, bytea) gbt_var_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_numeric_ops USING gist ADD
+	FUNCTION	9 (numeric, numeric) gbt_var_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_bit_ops USING gist ADD
+	FUNCTION	9 (bit, bit) gbt_var_fetch (internal) ;
+
+ALTER OPERATOR FAMILY gist_vbit_ops USING gist ADD
+	FUNCTION	9 (varbit, varbit) gbt_var_fetch (internal) ;

contrib/btree_gist/btree_gist--1.1.sql

@@ -249,6 +249,11 @@ RETURNS float8
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_oid_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_oid_compress(internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -264,6 +269,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_var_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_oid_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -305,11 +315,12 @@ AS
 -- Add operators that are new in 9.1.  We do it like this, leaving them
 -- "loose" in the operator family rather than bound into the opclass, because
 -- that's the only state that can be reproduced during an upgrade from 9.0.
-
 ALTER OPERATOR FAMILY gist_oid_ops USING gist ADD
 	OPERATOR	6	<> (oid, oid) ,
 	OPERATOR	15	<-> (oid, oid) FOR ORDER BY pg_catalog.oid_ops ,
-	FUNCTION	8 (oid, oid) gbt_oid_distance (internal, oid, int2, oid) ;
+	FUNCTION	8 (oid, oid) gbt_oid_distance (internal, oid, int2, oid) ,
+	-- Also add support function for index-only-scans, added in 9.5.
+	FUNCTION	9 (oid, oid) gbt_oid_fetch (internal) ;
 
 
 --
@@ -335,6 +346,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_int2_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_int2_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -376,8 +392,8 @@ AS
 ALTER OPERATOR FAMILY gist_int2_ops USING gist ADD
 	OPERATOR	6	<> (int2, int2) ,
 	OPERATOR	15	<-> (int2, int2) FOR ORDER BY pg_catalog.integer_ops ,
-	FUNCTION	8 (int2, int2) gbt_int2_distance (internal, int2, int2, oid) ;
-
+	FUNCTION	8 (int2, int2) gbt_int2_distance (internal, int2, int2, oid) ,
+	FUNCTION	9 (int2, int2) gbt_int2_fetch (internal) ;
 
 --
 --
@@ -402,6 +418,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_int4_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_int4_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -443,7 +464,8 @@ AS
 ALTER OPERATOR FAMILY gist_int4_ops USING gist ADD
 	OPERATOR	6	<> (int4, int4) ,
 	OPERATOR	15	<-> (int4, int4) FOR ORDER BY pg_catalog.integer_ops ,
-	FUNCTION	8 (int4, int4) gbt_int4_distance (internal, int4, int2, oid) ;
+	FUNCTION	8 (int4, int4) gbt_int4_distance (internal, int4, int2, oid) ,
+	FUNCTION	9 (int4, int4) gbt_int4_fetch (internal) ;
 
 
 --
@@ -469,6 +491,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_int8_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_int8_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -510,8 +537,8 @@ AS
 ALTER OPERATOR FAMILY gist_int8_ops USING gist ADD
 	OPERATOR	6	<> (int8, int8) ,
 	OPERATOR	15	<-> (int8, int8) FOR ORDER BY pg_catalog.integer_ops ,
-	FUNCTION	8 (int8, int8) gbt_int8_distance (internal, int8, int2, oid) ;
-
+	FUNCTION	8 (int8, int8) gbt_int8_distance (internal, int8, int2, oid) ,
+	FUNCTION	9 (int8, int8) gbt_int8_fetch (internal) ;
 
 --
 --
@@ -536,6 +563,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_float4_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_float4_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -577,8 +609,8 @@ AS
 ALTER OPERATOR FAMILY gist_float4_ops USING gist ADD
 	OPERATOR	6	<> (float4, float4) ,
 	OPERATOR	15	<-> (float4, float4) FOR ORDER BY pg_catalog.float_ops ,
-	FUNCTION	8 (float4, float4) gbt_float4_distance (internal, float4, int2, oid) ;
-
+	FUNCTION	8 (float4, float4) gbt_float4_distance (internal, float4, int2, oid) ,
+	FUNCTION	9 (float4, float4) gbt_float4_fetch (internal) ;
 
 --
 --
@@ -603,6 +635,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_float8_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_float8_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -644,8 +681,8 @@ AS
 ALTER OPERATOR FAMILY gist_float8_ops USING gist ADD
 	OPERATOR	6	<> (float8, float8) ,
 	OPERATOR	15	<-> (float8, float8) FOR ORDER BY pg_catalog.float_ops ,
-	FUNCTION	8 (float8, float8) gbt_float8_distance (internal, float8, int2, oid) ;
-
+	FUNCTION	8 (float8, float8) gbt_float8_distance (internal, float8, int2, oid) ,
+	FUNCTION	9 (float8, float8) gbt_float8_fetch (internal) ;
 
 --
 --
@@ -685,6 +722,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_ts_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_ts_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -726,8 +768,8 @@ AS
 ALTER OPERATOR FAMILY gist_timestamp_ops USING gist ADD
 	OPERATOR	6	<> (timestamp, timestamp) ,
 	OPERATOR	15	<-> (timestamp, timestamp) FOR ORDER BY pg_catalog.interval_ops ,
-	FUNCTION	8 (timestamp, timestamp) gbt_ts_distance (internal, timestamp, int2, oid) ;
-
+	FUNCTION	8 (timestamp, timestamp) gbt_ts_distance (internal, timestamp, int2, oid) ,
+	FUNCTION	9 (timestamp, timestamp) gbt_ts_fetch (internal) ;
 
 -- Create the operator class
 CREATE OPERATOR CLASS gist_timestamptz_ops
@@ -750,8 +792,8 @@ AS
 ALTER OPERATOR FAMILY gist_timestamptz_ops USING gist ADD
 	OPERATOR	6	<> (timestamptz, timestamptz) ,
 	OPERATOR	15	<-> (timestamptz, timestamptz) FOR ORDER BY pg_catalog.interval_ops ,
-	FUNCTION	8 (timestamptz, timestamptz) gbt_tstz_distance (internal, timestamptz, int2, oid) ;
-
+	FUNCTION	8 (timestamptz, timestamptz) gbt_tstz_distance (internal, timestamptz, int2, oid) ,
+	FUNCTION	9 (timestamptz, timestamptz) gbt_ts_fetch (internal) ;
 
 --
 --
@@ -786,6 +828,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_time_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_time_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -827,7 +874,8 @@ AS
 ALTER OPERATOR FAMILY gist_time_ops USING gist ADD
 	OPERATOR	6	<> (time, time) ,
 	OPERATOR	15	<-> (time, time) FOR ORDER BY pg_catalog.interval_ops ,
-	FUNCTION	8 (time, time) gbt_time_distance (internal, time, int2, oid) ;
+	FUNCTION	8 (time, time) gbt_time_distance (internal, time, int2, oid) ,
+	FUNCTION	9 (time, time) gbt_time_fetch (internal) ;
 
 
 CREATE OPERATOR CLASS gist_timetz_ops
@@ -849,6 +897,7 @@ AS
 
 ALTER OPERATOR FAMILY gist_timetz_ops USING gist ADD
 	OPERATOR	6	<> (timetz, timetz) ;
+	-- no 'fetch' function, as the compress function is lossy.
 
 
 --
@@ -874,6 +923,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_date_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_date_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -915,7 +969,8 @@ AS
 ALTER OPERATOR FAMILY gist_date_ops USING gist ADD
 	OPERATOR	6	<> (date, date) ,
 	OPERATOR	15	<-> (date, date) FOR ORDER BY pg_catalog.integer_ops ,
-	FUNCTION	8 (date, date) gbt_date_distance (internal, date, int2, oid) ;
+	FUNCTION	8 (date, date) gbt_date_distance (internal, date, int2, oid) ,
+	FUNCTION	9 (date, date) gbt_date_fetch (internal) ;
 
 
 --
@@ -946,6 +1001,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_intv_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_intv_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -987,7 +1047,8 @@ AS
 ALTER OPERATOR FAMILY gist_interval_ops USING gist ADD
 	OPERATOR	6	<> (interval, interval) ,
 	OPERATOR	15	<-> (interval, interval) FOR ORDER BY pg_catalog.interval_ops ,
-	FUNCTION	8 (interval, interval) gbt_intv_distance (internal, interval, int2, oid) ;
+	FUNCTION	8 (interval, interval) gbt_intv_distance (internal, interval, int2, oid) ,
+	FUNCTION	9 (interval, interval) gbt_intv_fetch (internal) ;
 
 
 --
@@ -1013,6 +1074,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_cash_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_cash_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -1054,7 +1120,8 @@ AS
 ALTER OPERATOR FAMILY gist_cash_ops USING gist ADD
 	OPERATOR	6	<> (money, money) ,
 	OPERATOR	15	<-> (money, money) FOR ORDER BY pg_catalog.money_ops ,
-	FUNCTION	8 (money, money) gbt_cash_distance (internal, money, int2, oid) ;
+	FUNCTION	8 (money, money) gbt_cash_distance (internal, money, int2, oid) ,
+	FUNCTION	9 (money, money) gbt_cash_fetch (internal) ;
 
 
 --
@@ -1075,6 +1142,11 @@ RETURNS internal
 AS 'MODULE_PATHNAME'
 LANGUAGE C IMMUTABLE STRICT;
 
+CREATE FUNCTION gbt_macad_fetch(internal)
+RETURNS internal
+AS 'MODULE_PATHNAME'
+LANGUAGE C IMMUTABLE STRICT;
+
 CREATE FUNCTION gbt_macad_penalty(internal,internal,internal)
 RETURNS internal
 AS 'MODULE_PATHNAME'
@@ -1114,7 +1186,8 @@ AS
 	STORAGE		gbtreekey16;
 
 ALTER OPERATOR FAMILY gist_macaddr_ops USING gist ADD
-	OPERATOR	6	<> (macaddr, macaddr) ;
+	OPERATOR	6	<> (macaddr, macaddr) ,
+	FUNCTION	9 (macaddr, macaddr) gbt_macad_fetch (internal);
 
 
 --
@@ -1184,7 +1257,8 @@ AS
 	STORAGE			gbtreekey_var;
 
 ALTER OPERATOR FAMILY gist_text_ops USING gist ADD
-	OPERATOR	6	<> (text, text) ;
+	OPERATOR	6	<> (text, text) ,
+	FUNCTION	9 (text, text) gbt_var_fetch (internal) ;
 
 
 ---- Create the operator class
@@ -1206,8 +1280,8 @@ AS
 	STORAGE			gbtreekey_var;
 
 ALTER OPERATOR FAMILY gist_bpchar_ops USING gist ADD
-	OPERATOR	6	<> (bpchar, bpchar) ;
-
+	OPERATOR	6	<> (bpchar, bpchar) ,
+	FUNCTION	9 (bpchar, bpchar) gbt_var_fetch (internal) ;
 
 --
 --
@@ -1265,7 +1339,8 @@ AS
 	STORAGE			gbtreekey_var;
 
 ALTER OPERATOR FAMILY gist_bytea_ops USING gist ADD
-	OPERATOR	6	<> (bytea, bytea) ;
+	OPERATOR	6	<> (bytea, bytea) ,
+	FUNCTION	9 (bytea, bytea) gbt_var_fetch (internal) ;
 
 
 --
@@ -1325,7 +1400,8 @@ AS
 	STORAGE			gbtreekey_var;
 
 ALTER OPERATOR FAMILY gist_numeric_ops USING gist ADD
-	OPERATOR	6	<> (numeric, numeric) ;
+	OPERATOR	6	<> (numeric, numeric) ,
+	FUNCTION	9 (numeric, numeric) gbt_var_fetch (internal) ;
 
 
 --
@@ -1384,7 +1460,8 @@ AS
 	STORAGE			gbtreekey_var;
 
 ALTER OPERATOR FAMILY gist_bit_ops USING gist ADD
-	OPERATOR	6	<> (bit, bit) ;
+	OPERATOR	6	<> (bit, bit) ,
+	FUNCTION	9 (bit, bit) gbt_var_fetch (internal) ;
 
 
 -- Create the operator class
@@ -1406,7 +1483,8 @@ AS
 	STORAGE			gbtreekey_var;
 
 ALTER OPERATOR FAMILY gist_vbit_ops USING gist ADD
-	OPERATOR	6	<> (varbit, varbit) ;
+	OPERATOR	6	<> (varbit, varbit) ,
+	FUNCTION	9 (varbit, varbit) gbt_var_fetch (internal) ;
 
 
 --
@@ -1467,7 +1545,7 @@ AS
 
 ALTER OPERATOR FAMILY gist_inet_ops USING gist ADD
 	OPERATOR	6	<>  (inet, inet) ;
-
+	-- no fetch support, the compress function is lossy
 
 -- Create the operator class
 CREATE OPERATOR CLASS gist_cidr_ops
@@ -1489,3 +1567,4 @@ AS
 
 ALTER OPERATOR FAMILY gist_cidr_ops USING gist ADD
 	OPERATOR	6	<> (inet, inet) ;
+	-- no fetch support, the compress function is lossy

contrib/btree_gist/btree_gist.control

@@ -1,5 +1,5 @@
 # btree_gist extension
 comment = 'support for indexing common datatypes in GiST'
-default_version = '1.0'
+default_version = '1.1'
 module_pathname = '$libdir/btree_gist'
 relocatable = true

contrib/btree_gist/btree_int2.c

@@ -16,6 +16,7 @@ typedef struct int16key
 ** int16 ops
 */
 PG_FUNCTION_INFO_V1(gbt_int2_compress);
+PG_FUNCTION_INFO_V1(gbt_int2_fetch);
 PG_FUNCTION_INFO_V1(gbt_int2_union);
 PG_FUNCTION_INFO_V1(gbt_int2_picksplit);
 PG_FUNCTION_INFO_V1(gbt_int2_consistent);
@@ -123,6 +124,13 @@ gbt_int2_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_int2_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_int2_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_int4.c

@@ -16,6 +16,7 @@ typedef struct int32key
 ** int32 ops
 */
 PG_FUNCTION_INFO_V1(gbt_int4_compress);
+PG_FUNCTION_INFO_V1(gbt_int4_fetch);
 PG_FUNCTION_INFO_V1(gbt_int4_union);
 PG_FUNCTION_INFO_V1(gbt_int4_picksplit);
 PG_FUNCTION_INFO_V1(gbt_int4_consistent);
@@ -124,6 +125,13 @@ gbt_int4_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_int4_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_int4_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_int8.c

@@ -16,6 +16,7 @@ typedef struct int64key
 ** int64 ops
 */
 PG_FUNCTION_INFO_V1(gbt_int8_compress);
+PG_FUNCTION_INFO_V1(gbt_int8_fetch);
 PG_FUNCTION_INFO_V1(gbt_int8_union);
 PG_FUNCTION_INFO_V1(gbt_int8_picksplit);
 PG_FUNCTION_INFO_V1(gbt_int8_consistent);
@@ -124,6 +125,13 @@ gbt_int8_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_int8_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_int8_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_interval.c

@@ -18,6 +18,7 @@ typedef struct
 ** Interval ops
 */
 PG_FUNCTION_INFO_V1(gbt_intv_compress);
+PG_FUNCTION_INFO_V1(gbt_intv_fetch);
 PG_FUNCTION_INFO_V1(gbt_intv_decompress);
 PG_FUNCTION_INFO_V1(gbt_intv_union);
 PG_FUNCTION_INFO_V1(gbt_intv_picksplit);
@@ -174,6 +175,14 @@ gbt_intv_compress(PG_FUNCTION_ARGS)
 
 }
 
+Datum
+gbt_intv_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
+
 Datum
 gbt_intv_decompress(PG_FUNCTION_ARGS)
 {

contrib/btree_gist/btree_macaddr.c

@@ -19,6 +19,7 @@ typedef struct
 ** OID ops
 */
 PG_FUNCTION_INFO_V1(gbt_macad_compress);
+PG_FUNCTION_INFO_V1(gbt_macad_fetch);
 PG_FUNCTION_INFO_V1(gbt_macad_union);
 PG_FUNCTION_INFO_V1(gbt_macad_picksplit);
 PG_FUNCTION_INFO_V1(gbt_macad_consistent);
@@ -114,6 +115,13 @@ gbt_macad_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_macad_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_macad_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_oid.c

@@ -16,6 +16,7 @@ typedef struct
 ** OID ops
 */
 PG_FUNCTION_INFO_V1(gbt_oid_compress);
+PG_FUNCTION_INFO_V1(gbt_oid_fetch);
 PG_FUNCTION_INFO_V1(gbt_oid_union);
 PG_FUNCTION_INFO_V1(gbt_oid_picksplit);
 PG_FUNCTION_INFO_V1(gbt_oid_consistent);
@@ -124,6 +125,13 @@ gbt_oid_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(gbt_num_compress(entry, &tinfo));
 }
 
+Datum
+gbt_oid_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_oid_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_time.c

@@ -19,6 +19,7 @@ typedef struct
 */
 PG_FUNCTION_INFO_V1(gbt_time_compress);
 PG_FUNCTION_INFO_V1(gbt_timetz_compress);
+PG_FUNCTION_INFO_V1(gbt_time_fetch);
 PG_FUNCTION_INFO_V1(gbt_time_union);
 PG_FUNCTION_INFO_V1(gbt_time_picksplit);
 PG_FUNCTION_INFO_V1(gbt_time_consistent);
@@ -192,6 +193,13 @@ gbt_timetz_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(retval);
 }
 
+Datum
+gbt_time_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_time_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_ts.c

@@ -19,6 +19,7 @@ typedef struct
 */
 PG_FUNCTION_INFO_V1(gbt_ts_compress);
 PG_FUNCTION_INFO_V1(gbt_tstz_compress);
+PG_FUNCTION_INFO_V1(gbt_ts_fetch);
 PG_FUNCTION_INFO_V1(gbt_ts_union);
 PG_FUNCTION_INFO_V1(gbt_ts_picksplit);
 PG_FUNCTION_INFO_V1(gbt_ts_consistent);
@@ -243,6 +244,13 @@ gbt_tstz_compress(PG_FUNCTION_ARGS)
 	PG_RETURN_POINTER(retval);
 }
 
+Datum
+gbt_ts_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+
+	PG_RETURN_POINTER(gbt_num_fetch(entry, &tinfo));
+}
 
 Datum
 gbt_ts_consistent(PG_FUNCTION_ARGS)

contrib/btree_gist/btree_utils_num.c

@@ -93,6 +93,64 @@ gbt_num_compress(GISTENTRY *entry, const gbtree_ninfo *tinfo)
 	return retval;
 }
 
+/*
+ * Convert a compressed leaf item back to the original type, for index-only
+ * scans.
+ */
+GISTENTRY *
+gbt_num_fetch(GISTENTRY *entry, const gbtree_ninfo *tinfo)
+{
+	GISTENTRY  *retval;
+	Datum		datum;
+
+	Assert(tinfo->indexsize >= 2 * tinfo->size);
+
+	/*
+	 * Get the original Datum from the stored datum. On leaf entries, the
+	 * lower and upper bound are the same. We just grab the lower bound and
+	 * return it.
+	 */
+	switch (tinfo->t)
+	{
+		case gbt_t_int2:
+			datum = Int16GetDatum(*(int16 *) entry->key);
+			break;
+		case gbt_t_int4:
+			datum = Int32GetDatum(*(int32 *) entry->key);
+			break;
+		case gbt_t_int8:
+			datum = Int64GetDatum(*(int64 *) entry->key);
+			break;
+		case gbt_t_oid:
+			datum = ObjectIdGetDatum(*(Oid *) entry->key);
+			break;
+		case gbt_t_float4:
+			datum = Float4GetDatum(*(float4 *) entry->key);
+			break;
+		case gbt_t_float8:
+			datum = Float8GetDatum(*(float8 *) entry->key);
+			break;
+		case gbt_t_date:
+			datum = DateADTGetDatum(*(DateADT *) entry->key);
+			break;
+		case gbt_t_time:
+			datum = TimeADTGetDatum(*(TimeADT *) entry->key);
+			break;
+		case gbt_t_ts:
+			datum = TimestampGetDatum(*(Timestamp *) entry->key);
+			break;
+		case gbt_t_cash:
+			datum = CashGetDatum(*(Cash *) entry->key);
+			break;
+		default:
+			datum = PointerGetDatum(entry->key);
+	}
+
+	retval = palloc(sizeof(GISTENTRY));
+	gistentryinit(*retval, datum, entry->rel, entry->page, entry->offset,
+				  FALSE);
+	return retval;
+}
 
 
 

contrib/btree_gist/btree_utils_num.h

@@ -130,6 +130,7 @@ extern GIST_SPLITVEC *gbt_num_picksplit(const GistEntryVector *entryvec, GIST_SP
 
 extern GISTENTRY *gbt_num_compress(GISTENTRY *entry, const gbtree_ninfo *tinfo);
 
+extern GISTENTRY *gbt_num_fetch(GISTENTRY *entry, const gbtree_ninfo *tinfo);
 
 extern void *gbt_num_union(GBT_NUMKEY *out, const GistEntryVector *entryvec,
 			  const gbtree_ninfo *tinfo);

contrib/btree_gist/btree_utils_var.c

@@ -29,6 +29,7 @@ typedef struct
 
 
 PG_FUNCTION_INFO_V1(gbt_var_decompress);
+PG_FUNCTION_INFO_V1(gbt_var_fetch);
 
 
 Datum
@@ -301,6 +302,23 @@ gbt_var_compress(GISTENTRY *entry, const gbtree_vinfo *tinfo)
 }
 
 
+Datum
+gbt_var_fetch(PG_FUNCTION_ARGS)
+{
+	GISTENTRY  *entry = (GISTENTRY *) PG_GETARG_POINTER(0);
+	GBT_VARKEY *key = (GBT_VARKEY *) DatumGetPointer(PG_DETOAST_DATUM(entry->key));
+	GBT_VARKEY_R r = gbt_var_key_readable(key);
+	GISTENTRY  *retval;
+
+	retval = palloc(sizeof(GISTENTRY));
+	gistentryinit(*retval, PointerGetDatum(r.lower),
+				  entry->rel, entry->page,
+				  entry->offset, TRUE);
+
+	PG_RETURN_POINTER(retval);
+}
+
+
 GBT_VARKEY *
 gbt_var_union(const GistEntryVector *entryvec, int32 *size, Oid collation,
 			  const gbtree_vinfo *tinfo)

contrib/btree_gist/expected/bit.out

@@ -64,3 +64,13 @@ SELECT count(*) FROM bittmp WHERE a >   '011011000100010111011000110000100';
    350
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT a FROM bittmp WHERE a BETWEEN '1000000' and '1000001';
+                              QUERY PLAN                               
+-----------------------------------------------------------------------
+ Index Only Scan using bitidx on bittmp
+   Index Cond: ((a >= B'1000000'::"bit") AND (a <= B'1000001'::"bit"))
+(2 rows)
+

contrib/btree_gist/expected/bytea.out

@@ -71,3 +71,20 @@ SELECT count(*) FROM byteatmp WHERE a  =  '2eb2c961c1cbf6 cf8d7b68cb9a2f36 7bbed
      1
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT a FROM byteatmp where a > 'ffa'::bytea;
+                 QUERY PLAN                 
+--------------------------------------------
+ Index Only Scan using byteaidx on byteatmp
+   Index Cond: (a > '\x666661'::bytea)
+(2 rows)
+
+SELECT a FROM byteatmp where a > 'ffa'::bytea;
+               a                
+--------------------------------
+ \x666662656532373363376262
+ \x6666626663313331336339633835
+(2 rows)
+

contrib/btree_gist/expected/cash.out

@@ -74,10 +74,10 @@ SELECT count(*) FROM moneytmp WHERE a >  '22649.64'::money;
 
 EXPLAIN (COSTS OFF)
 SELECT a, a <-> '21472.79' FROM moneytmp ORDER BY a <-> '21472.79' LIMIT 3;
-                  QUERY PLAN                   
------------------------------------------------
+                    QUERY PLAN                    
+--------------------------------------------------
  Limit
-   ->  Index Scan using moneyidx on moneytmp
+   ->  Index Only Scan using moneyidx on moneytmp
          Order By: (a <-> '$21,472.79'::money)
 (3 rows)
 

contrib/btree_gist/expected/char.out

@@ -64,3 +64,19 @@ SELECT count(*) FROM chartmp WHERE a >   '31b0'::char(32);
    400
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM chartmp WHERE a BETWEEN '31a' AND '31c';
+                          QUERY PLAN                           
+---------------------------------------------------------------
+ Index Only Scan using charidx on chartmp
+   Index Cond: ((a >= '31a'::bpchar) AND (a <= '31c'::bpchar))
+(2 rows)
+
+SELECT * FROM chartmp WHERE a BETWEEN '31a' AND '31c';
+  a   
+------
+ 31b0
+(1 row)
+

contrib/btree_gist/expected/char_1.out

@@ -64,3 +64,19 @@ SELECT count(*) FROM chartmp WHERE a >   '31b0'::char(32);
    214
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM chartmp WHERE a BETWEEN '31a' AND '31c';
+                          QUERY PLAN                           
+---------------------------------------------------------------
+ Index Only Scan using charidx on chartmp
+   Index Cond: ((a >= '31a'::bpchar) AND (a <= '31c'::bpchar))
+(2 rows)
+
+SELECT * FROM chartmp WHERE a BETWEEN '31a' AND '31c';
+  a   
+------
+ 31b0
+(1 row)
+

contrib/btree_gist/expected/date.out

@@ -74,10 +74,10 @@ SELECT count(*) FROM datetmp WHERE a >  '2001-02-13'::date;
 
 EXPLAIN (COSTS OFF)
 SELECT a, a <-> '2001-02-13' FROM datetmp ORDER BY a <-> '2001-02-13' LIMIT 3;
-                  QUERY PLAN                  
-----------------------------------------------
+                   QUERY PLAN                   
+------------------------------------------------
  Limit
-   ->  Index Scan using dateidx on datetmp
+   ->  Index Only Scan using dateidx on datetmp
          Order By: (a <-> '02-13-2001'::date)
 (3 rows)
 

contrib/btree_gist/expected/float4.out

@@ -74,10 +74,10 @@ SELECT count(*) FROM float4tmp WHERE a >  -179.0::float4;
 
 EXPLAIN (COSTS OFF)
 SELECT a, a <-> '-179.0' FROM float4tmp ORDER BY a <-> '-179.0' LIMIT 3;
-                  QUERY PLAN                   
------------------------------------------------
+                     QUERY PLAN                     
+----------------------------------------------------
  Limit
-   ->  Index Scan using float4idx on float4tmp
+   ->  Index Only Scan using float4idx on float4tmp
          Order By: (a <-> (-179)::real)
 (3 rows)
 

contrib/btree_gist/expected/float8.out

@@ -77,7 +77,7 @@ SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3;
                      QUERY PLAN                      
 -----------------------------------------------------
  Limit
-   ->  Index Scan using float8idx on float8tmp
+   ->  Index Only Scan using float8idx on float8tmp
          Order By: (a <-> (-1890)::double precision)
 (3 rows)
 

contrib/btree_gist/expected/int2.out

@@ -74,10 +74,10 @@ SELECT count(*) FROM int2tmp WHERE a >  237::int2;
 
 EXPLAIN (COSTS OFF)
 SELECT a, a <-> '237' FROM int2tmp ORDER BY a <-> '237' LIMIT 3;
-                QUERY PLAN                 
--------------------------------------------
+                   QUERY PLAN                   
+------------------------------------------------
  Limit
-   ->  Index Scan using int2idx on int2tmp
+   ->  Index Only Scan using int2idx on int2tmp
          Order By: (a <-> 237::smallint)
 (3 rows)
 

contrib/btree_gist/expected/int4.out

@@ -74,10 +74,10 @@ SELECT count(*) FROM int4tmp WHERE a >  237::int4;
 
 EXPLAIN (COSTS OFF)
 SELECT a, a <-> '237' FROM int4tmp ORDER BY a <-> '237' LIMIT 3;
-                QUERY PLAN                 
--------------------------------------------
+                   QUERY PLAN                   
+------------------------------------------------
  Limit
-   ->  Index Scan using int4idx on int4tmp
+   ->  Index Only Scan using int4idx on int4tmp
          Order By: (a <-> 237)
 (3 rows)
 

contrib/btree_gist/expected/int8.out

@@ -77,7 +77,7 @@ SELECT a, a <-> '464571291354841' FROM int8tmp ORDER BY a <-> '464571291354841'
                     QUERY PLAN                     
 ---------------------------------------------------
  Limit
-   ->  Index Scan using int8idx on int8tmp
+   ->  Index Only Scan using int8idx on int8tmp
          Order By: (a <-> 464571291354841::bigint)
 (3 rows)
 

contrib/btree_gist/expected/interval.out

@@ -77,7 +77,7 @@ SELECT a, a <-> '199 days 21:21:23' FROM intervaltmp ORDER BY a <-> '199 days 21
                                 QUERY PLAN                                 
 ---------------------------------------------------------------------------
  Limit
-   ->  Index Scan using intervalidx on intervaltmp
+   ->  Index Only Scan using intervalidx on intervaltmp
          Order By: (a <-> '@ 199 days 21 hours 21 mins 23 secs'::interval)
 (3 rows)
 

contrib/btree_gist/expected/macaddr.out

@@ -64,3 +64,26 @@ SELECT count(*) FROM macaddrtmp WHERE a >  '22:00:5c:e5:9b:0d'::macaddr;
    540
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM macaddrtmp WHERE a < '02:03:04:05:06:07'::macaddr;
+                    QUERY PLAN                    
+--------------------------------------------------
+ Index Only Scan using macaddridx on macaddrtmp
+   Index Cond: (a < '02:03:04:05:06:07'::macaddr)
+(2 rows)
+
+SELECT * FROM macaddrtmp WHERE a < '02:03:04:05:06:07'::macaddr;
+         a         
+-------------------
+ 01:02:37:05:4f:36
+ 01:02:37:05:4f:36
+ 01:02:37:05:4f:36
+ 01:02:37:05:4f:36
+ 01:43:b5:79:eb:0f
+ 01:43:b5:79:eb:0f
+ 01:43:b5:79:eb:0f
+ 01:43:b5:79:eb:0f
+(8 rows)
+

contrib/btree_gist/expected/numeric.out

@@ -186,3 +186,22 @@ SELECT count(*) FROM numerictmp WHERE a >  0 ;
    576
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM numerictmp WHERE a BETWEEN 1 AND 300 ORDER BY a;
+                           QUERY PLAN                            
+-----------------------------------------------------------------
+ Sort
+   Sort Key: a
+   ->  Index Only Scan using numericidx on numerictmp
+         Index Cond: ((a >= 1::numeric) AND (a <= 300::numeric))
+(4 rows)
+
+SELECT * FROM numerictmp WHERE a BETWEEN 1 AND 300 ORDER BY a;
+     a      
+------------
+ 204.035430
+ 207.400532
+(2 rows)
+

contrib/btree_gist/expected/text.out

@@ -71,3 +71,19 @@ SELECT count(*) FROM texttmp WHERE a  =  '2eb2c961c1cbf6 cf8d7b68cb9a2f36 7bbedb
      1
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM texttmp WHERE a BETWEEN '31a' AND '31c';
+                        QUERY PLAN                         
+-----------------------------------------------------------
+ Index Only Scan using textidx on texttmp
+   Index Cond: ((a >= '31a'::text) AND (a <= '31c'::text))
+(2 rows)
+
+SELECT * FROM texttmp WHERE a BETWEEN '31a' AND '31c';
+  a   
+------
+ 31b0
+(1 row)
+

contrib/btree_gist/expected/text_1.out

@@ -71,3 +71,19 @@ SELECT count(*) FROM texttmp WHERE a  =  '2eb2c961c1cbf6 cf8d7b68cb9a2f36 7bbedb
      1
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM texttmp WHERE a BETWEEN '31a' AND '31c';
+                        QUERY PLAN                         
+-----------------------------------------------------------
+ Index Only Scan using textidx on texttmp
+   Index Cond: ((a >= '31a'::text) AND (a <= '31c'::text))
+(2 rows)
+
+SELECT * FROM texttmp WHERE a BETWEEN '31a' AND '31c';
+  a   
+------
+ 31b0
+(1 row)
+

contrib/btree_gist/expected/time.out

@@ -77,7 +77,7 @@ SELECT a, a <-> '10:57:11' FROM timetmp ORDER BY a <-> '10:57:11' LIMIT 3;
                           QUERY PLAN                          
 --------------------------------------------------------------
  Limit
-   ->  Index Scan using timeidx on timetmp
+   ->  Index Only Scan using timeidx on timetmp
          Order By: (a <-> '10:57:11'::time without time zone)
 (3 rows)
 

contrib/btree_gist/expected/timestamp.out

@@ -77,7 +77,7 @@ SELECT a, a <-> '2004-10-26 08:55:08' FROM timestamptmp ORDER BY a <-> '2004-10-
                                     QUERY PLAN                                     
 -----------------------------------------------------------------------------------
  Limit
-   ->  Index Scan using timestampidx on timestamptmp
+   ->  Index Only Scan using timestampidx on timestamptmp
          Order By: (a <-> 'Tue Oct 26 08:55:08 2004'::timestamp without time zone)
 (3 rows)
 

contrib/btree_gist/expected/timestamptz.out

@@ -197,7 +197,7 @@ SELECT a, a <-> '2018-12-18 10:59:54 GMT+2' FROM timestamptztmp ORDER BY a <-> '
                                      QUERY PLAN                                     
 ------------------------------------------------------------------------------------
  Limit
-   ->  Index Scan using timestamptzidx on timestamptztmp
+   ->  Index Only Scan using timestamptzidx on timestamptztmp
          Order By: (a <-> 'Tue Dec 18 04:59:54 2018 PST'::timestamp with time zone)
 (3 rows)
 

contrib/btree_gist/expected/varbit.out

@@ -64,3 +64,13 @@ SELECT count(*) FROM varbittmp WHERE a >   '1110100111010'::varbit;
     50
 (1 row)
 
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT a FROM bittmp WHERE a BETWEEN '1000000' and '1000001';
+                              QUERY PLAN                               
+-----------------------------------------------------------------------
+ Index Only Scan using bitidx on bittmp
+   Index Cond: ((a >= B'1000000'::"bit") AND (a <= B'1000001'::"bit"))
+(2 rows)
+

contrib/btree_gist/sql/bit.sql

@@ -29,3 +29,8 @@ SELECT count(*) FROM bittmp WHERE a  =  '011011000100010111011000110000100';
 SELECT count(*) FROM bittmp WHERE a >=  '011011000100010111011000110000100';
 
 SELECT count(*) FROM bittmp WHERE a >   '011011000100010111011000110000100';
+
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT a FROM bittmp WHERE a BETWEEN '1000000' and '1000001';

contrib/btree_gist/sql/char.sql

@@ -29,3 +29,9 @@ SELECT count(*) FROM chartmp WHERE a  =  '31b0'::char(32);
 SELECT count(*) FROM chartmp WHERE a >=  '31b0'::char(32);
 
 SELECT count(*) FROM chartmp WHERE a >   '31b0'::char(32);
+
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM chartmp WHERE a BETWEEN '31a' AND '31c';
+SELECT * FROM chartmp WHERE a BETWEEN '31a' AND '31c';

contrib/btree_gist/sql/macaddr.sql

@@ -29,3 +29,9 @@ SELECT count(*) FROM macaddrtmp WHERE a  = '22:00:5c:e5:9b:0d'::macaddr;
 SELECT count(*) FROM macaddrtmp WHERE a >= '22:00:5c:e5:9b:0d'::macaddr;
 
 SELECT count(*) FROM macaddrtmp WHERE a >  '22:00:5c:e5:9b:0d'::macaddr;
+
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM macaddrtmp WHERE a < '02:03:04:05:06:07'::macaddr;
+SELECT * FROM macaddrtmp WHERE a < '02:03:04:05:06:07'::macaddr;

contrib/btree_gist/sql/numeric.sql

@@ -75,3 +75,9 @@ SELECT count(*) FROM numerictmp WHERE a  = 0 ;
 SELECT count(*) FROM numerictmp WHERE a >= 0 ;
 
 SELECT count(*) FROM numerictmp WHERE a >  0 ;
+
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT * FROM numerictmp WHERE a BETWEEN 1 AND 300 ORDER BY a;
+SELECT * FROM numerictmp WHERE a BETWEEN 1 AND 300 ORDER BY a;

contrib/btree_gist/sql/varbit.sql

@@ -29,3 +29,8 @@ SELECT count(*) FROM varbittmp WHERE a  =  '1110100111010'::varbit;
 SELECT count(*) FROM varbittmp WHERE a >=  '1110100111010'::varbit;
 
 SELECT count(*) FROM varbittmp WHERE a >   '1110100111010'::varbit;
+
+-- Test index-only scans
+SET enable_bitmapscan=off;
+EXPLAIN (COSTS OFF)
+SELECT a FROM bittmp WHERE a BETWEEN '1000000' and '1000001';