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e2b64fcef3
Extend the infrastructure in btree_gin.c to permit cross-type operators, and add the code to support them for the int2, int4, and int8 opclasses. (To keep this patch digestible, I left the other datatypes for a separate patch.) This improves the usability of btree_gin indexes by allowing them to support the same set of queries that a regular btree index does. Author: Tom Lane <tgl@sss.pgh.pa.us> Reviewed-by: Arseniy Mukhin <arseniy.mukhin.dev@gmail.com> Discussion: https://postgr.es/m/262624.1738460652@sss.pgh.pa.us
145 lines
2.0 KiB
Plaintext
145 lines
2.0 KiB
Plaintext
set enable_seqscan=off;
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CREATE TABLE test_int4 (
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i int4
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);
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INSERT INTO test_int4 VALUES (-2),(-1),(0),(1),(2),(3);
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CREATE INDEX idx_int4 ON test_int4 USING gin (i);
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SELECT * FROM test_int4 WHERE i<1::int4 ORDER BY i;
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i
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----
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-2
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-1
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0
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(3 rows)
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SELECT * FROM test_int4 WHERE i<=1::int4 ORDER BY i;
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i
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----
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-2
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-1
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0
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1
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(4 rows)
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SELECT * FROM test_int4 WHERE i=1::int4 ORDER BY i;
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i
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---
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1
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(1 row)
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SELECT * FROM test_int4 WHERE i>=1::int4 ORDER BY i;
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i
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---
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1
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2
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3
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(3 rows)
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SELECT * FROM test_int4 WHERE i>1::int4 ORDER BY i;
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i
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---
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2
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3
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(2 rows)
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explain (costs off)
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SELECT * FROM test_int4 WHERE i<1::int2 ORDER BY i;
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QUERY PLAN
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-----------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_int4
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Recheck Cond: (i < '1'::smallint)
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-> Bitmap Index Scan on idx_int4
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Index Cond: (i < '1'::smallint)
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(6 rows)
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SELECT * FROM test_int4 WHERE i<1::int2 ORDER BY i;
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i
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----
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-2
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-1
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0
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(3 rows)
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SELECT * FROM test_int4 WHERE i<=1::int2 ORDER BY i;
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i
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----
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-2
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-1
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0
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1
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(4 rows)
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SELECT * FROM test_int4 WHERE i=1::int2 ORDER BY i;
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i
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---
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1
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(1 row)
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SELECT * FROM test_int4 WHERE i>=1::int2 ORDER BY i;
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i
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---
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1
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2
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3
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(3 rows)
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SELECT * FROM test_int4 WHERE i>1::int2 ORDER BY i;
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i
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---
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2
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3
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(2 rows)
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explain (costs off)
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SELECT * FROM test_int4 WHERE i<1::int8 ORDER BY i;
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QUERY PLAN
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---------------------------------------------
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Sort
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Sort Key: i
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-> Bitmap Heap Scan on test_int4
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Recheck Cond: (i < '1'::bigint)
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-> Bitmap Index Scan on idx_int4
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Index Cond: (i < '1'::bigint)
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(6 rows)
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SELECT * FROM test_int4 WHERE i<1::int8 ORDER BY i;
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i
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----
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-2
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-1
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0
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(3 rows)
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SELECT * FROM test_int4 WHERE i<=1::int8 ORDER BY i;
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i
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----
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-2
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-1
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0
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1
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(4 rows)
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SELECT * FROM test_int4 WHERE i=1::int8 ORDER BY i;
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i
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---
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1
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(1 row)
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SELECT * FROM test_int4 WHERE i>=1::int8 ORDER BY i;
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i
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---
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1
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2
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3
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(3 rows)
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SELECT * FROM test_int4 WHERE i>1::int8 ORDER BY i;
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i
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---
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2
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3
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(2 rows)
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