mirror of
https://git.postgresql.org/git/postgresql.git
synced 2026-02-22 14:27:00 +08:00
a148f8bc04
This fills in some gaps in planner support for starts_with() and the equivalent ^@ operator: * A condition such as "textcol ^@ constant" can now use a regular btree index, not only an SP-GiST index, so long as the index's collation is C. (This works just like "textcol LIKE 'foo%'".) * "starts_with(textcol, constant)" can be optimized the same as "textcol ^@ constant". * Fixed-prefix LIKE and regex patterns are now more like starts_with() in another way: if you apply one to an SPGiST-indexed column, you'll get an index condition using ^@ rather than two index conditions with >= and <. Per a complaint from Shay Rojansky. Patch by me; thanks to Nathan Bossart for review. Discussion: https://postgr.es/m/232599.1633800229@sss.pgh.pa.us
438 lines
17 KiB
SQL
438 lines
17 KiB
SQL
--
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-- SP-GiST index tests
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--
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CREATE TABLE quad_point_tbl AS
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SELECT point(unique1,unique2) AS p FROM tenk1;
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INSERT INTO quad_point_tbl
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SELECT '(333.0,400.0)'::point FROM generate_series(1,1000);
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INSERT INTO quad_point_tbl VALUES (NULL), (NULL), (NULL);
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CREATE INDEX sp_quad_ind ON quad_point_tbl USING spgist (p);
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CREATE TABLE kd_point_tbl AS SELECT * FROM quad_point_tbl;
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CREATE INDEX sp_kd_ind ON kd_point_tbl USING spgist (p kd_point_ops);
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CREATE TABLE radix_text_tbl AS
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SELECT name AS t FROM road WHERE name !~ '^[0-9]';
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INSERT INTO radix_text_tbl
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SELECT 'P0123456789abcdef' FROM generate_series(1,1000);
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INSERT INTO radix_text_tbl VALUES ('P0123456789abcde');
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INSERT INTO radix_text_tbl VALUES ('P0123456789abcdefF');
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CREATE INDEX sp_radix_ind ON radix_text_tbl USING spgist (t);
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-- get non-indexed results for comparison purposes
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SET enable_seqscan = ON;
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SET enable_indexscan = OFF;
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SET enable_bitmapscan = OFF;
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SELECT count(*) FROM quad_point_tbl WHERE p IS NULL;
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SELECT count(*) FROM quad_point_tbl WHERE p IS NOT NULL;
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SELECT count(*) FROM quad_point_tbl;
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SELECT count(*) FROM quad_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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SELECT count(*) FROM quad_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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SELECT count(*) FROM quad_point_tbl WHERE p << '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p >> '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p <<| '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p |>> '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p ~= '(4585, 365)';
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CREATE TEMP TABLE quad_point_tbl_ord_seq1 AS
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM quad_point_tbl;
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CREATE TEMP TABLE quad_point_tbl_ord_seq2 AS
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM quad_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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CREATE TEMP TABLE quad_point_tbl_ord_seq3 AS
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SELECT row_number() OVER (ORDER BY p <-> '333,400') n, p <-> '333,400' dist, p
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FROM quad_point_tbl WHERE p IS NOT NULL;
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdef';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcde';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdefF';
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SELECT count(*) FROM radix_text_tbl WHERE t < 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~<~ 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t <= 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~<=~ 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t >= 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~>=~ 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t > 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~>~ 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t ^@ 'Worth';
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-- Now check the results from plain indexscan
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SET enable_seqscan = OFF;
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SET enable_indexscan = ON;
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SET enable_bitmapscan = OFF;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p IS NULL;
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SELECT count(*) FROM quad_point_tbl WHERE p IS NULL;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p IS NOT NULL;
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SELECT count(*) FROM quad_point_tbl WHERE p IS NOT NULL;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl;
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SELECT count(*) FROM quad_point_tbl;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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SELECT count(*) FROM quad_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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SELECT count(*) FROM quad_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p << '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p << '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p >> '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p >> '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p <<| '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p <<| '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p |>> '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p |>> '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p ~= '(4585, 365)';
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SELECT count(*) FROM quad_point_tbl WHERE p ~= '(4585, 365)';
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EXPLAIN (COSTS OFF)
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM quad_point_tbl;
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CREATE TEMP TABLE quad_point_tbl_ord_idx1 AS
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM quad_point_tbl;
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SELECT * FROM quad_point_tbl_ord_seq1 seq FULL JOIN quad_point_tbl_ord_idx1 idx
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ON seq.n = idx.n
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WHERE seq.dist IS DISTINCT FROM idx.dist;
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EXPLAIN (COSTS OFF)
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM quad_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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CREATE TEMP TABLE quad_point_tbl_ord_idx2 AS
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM quad_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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SELECT * FROM quad_point_tbl_ord_seq2 seq FULL JOIN quad_point_tbl_ord_idx2 idx
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ON seq.n = idx.n
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WHERE seq.dist IS DISTINCT FROM idx.dist;
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EXPLAIN (COSTS OFF)
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SELECT row_number() OVER (ORDER BY p <-> '333,400') n, p <-> '333,400' dist, p
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FROM quad_point_tbl WHERE p IS NOT NULL;
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CREATE TEMP TABLE quad_point_tbl_ord_idx3 AS
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SELECT row_number() OVER (ORDER BY p <-> '333,400') n, p <-> '333,400' dist, p
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FROM quad_point_tbl WHERE p IS NOT NULL;
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SELECT * FROM quad_point_tbl_ord_seq3 seq FULL JOIN quad_point_tbl_ord_idx3 idx
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ON seq.n = idx.n
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WHERE seq.dist IS DISTINCT FROM idx.dist;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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SELECT count(*) FROM kd_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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SELECT count(*) FROM kd_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p << '(5000, 4000)';
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SELECT count(*) FROM kd_point_tbl WHERE p << '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p >> '(5000, 4000)';
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SELECT count(*) FROM kd_point_tbl WHERE p >> '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p <<| '(5000, 4000)';
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SELECT count(*) FROM kd_point_tbl WHERE p <<| '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p |>> '(5000, 4000)';
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SELECT count(*) FROM kd_point_tbl WHERE p |>> '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
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SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
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EXPLAIN (COSTS OFF)
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM kd_point_tbl;
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CREATE TEMP TABLE kd_point_tbl_ord_idx1 AS
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM kd_point_tbl;
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SELECT * FROM quad_point_tbl_ord_seq1 seq FULL JOIN kd_point_tbl_ord_idx1 idx
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ON seq.n = idx.n
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WHERE seq.dist IS DISTINCT FROM idx.dist;
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EXPLAIN (COSTS OFF)
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM kd_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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CREATE TEMP TABLE kd_point_tbl_ord_idx2 AS
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SELECT row_number() OVER (ORDER BY p <-> '0,0') n, p <-> '0,0' dist, p
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FROM kd_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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SELECT * FROM quad_point_tbl_ord_seq2 seq FULL JOIN kd_point_tbl_ord_idx2 idx
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ON seq.n = idx.n
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WHERE seq.dist IS DISTINCT FROM idx.dist;
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EXPLAIN (COSTS OFF)
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SELECT row_number() OVER (ORDER BY p <-> '333,400') n, p <-> '333,400' dist, p
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FROM kd_point_tbl WHERE p IS NOT NULL;
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CREATE TEMP TABLE kd_point_tbl_ord_idx3 AS
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SELECT row_number() OVER (ORDER BY p <-> '333,400') n, p <-> '333,400' dist, p
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FROM kd_point_tbl WHERE p IS NOT NULL;
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SELECT * FROM quad_point_tbl_ord_seq3 seq FULL JOIN kd_point_tbl_ord_idx3 idx
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ON seq.n = idx.n
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WHERE seq.dist IS DISTINCT FROM idx.dist;
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-- test KNN scan with included columns
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-- the distance numbers are not exactly the same across platforms
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SET extra_float_digits = 0;
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CREATE INDEX ON quad_point_tbl_ord_seq1 USING spgist(p) INCLUDE(dist);
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EXPLAIN (COSTS OFF)
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SELECT p, dist FROM quad_point_tbl_ord_seq1 ORDER BY p <-> '0,0' LIMIT 10;
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SELECT p, dist FROM quad_point_tbl_ord_seq1 ORDER BY p <-> '0,0' LIMIT 10;
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RESET extra_float_digits;
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-- check ORDER BY distance to NULL
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SELECT (SELECT p FROM kd_point_tbl ORDER BY p <-> pt, p <-> '0,0' LIMIT 1)
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FROM (VALUES (point '1,2'), (NULL), ('1234,5678')) pts(pt);
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdef';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdef';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcde';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcde';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdefF';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdefF';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t < 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t < 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ~<~ 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~<~ 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t <= 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t <= 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ~<=~ 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~<=~ 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t >= 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t >= 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ~>=~ 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~>=~ 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t > 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t > 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ~>~ 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~>~ 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ^@ 'Worth';
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SELECT count(*) FROM radix_text_tbl WHERE t ^@ 'Worth';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE starts_with(t, 'Worth');
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SELECT count(*) FROM radix_text_tbl WHERE starts_with(t, 'Worth');
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-- Now check the results from bitmap indexscan
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SET enable_seqscan = OFF;
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SET enable_indexscan = OFF;
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SET enable_bitmapscan = ON;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p IS NULL;
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SELECT count(*) FROM quad_point_tbl WHERE p IS NULL;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p IS NOT NULL;
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SELECT count(*) FROM quad_point_tbl WHERE p IS NOT NULL;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl;
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SELECT count(*) FROM quad_point_tbl;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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SELECT count(*) FROM quad_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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SELECT count(*) FROM quad_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p << '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p << '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p >> '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p >> '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p <<| '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p <<| '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p |>> '(5000, 4000)';
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SELECT count(*) FROM quad_point_tbl WHERE p |>> '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM quad_point_tbl WHERE p ~= '(4585, 365)';
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SELECT count(*) FROM quad_point_tbl WHERE p ~= '(4585, 365)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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SELECT count(*) FROM kd_point_tbl WHERE p <@ box '(200,200,1000,1000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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SELECT count(*) FROM kd_point_tbl WHERE box '(200,200,1000,1000)' @> p;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p << '(5000, 4000)';
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SELECT count(*) FROM kd_point_tbl WHERE p << '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p >> '(5000, 4000)';
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SELECT count(*) FROM kd_point_tbl WHERE p >> '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p <<| '(5000, 4000)';
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SELECT count(*) FROM kd_point_tbl WHERE p <<| '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p |>> '(5000, 4000)';
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SELECT count(*) FROM kd_point_tbl WHERE p |>> '(5000, 4000)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
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SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdef';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdef';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcde';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcde';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdefF';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'P0123456789abcdefF';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t < 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t < 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ~<~ 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~<~ 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t <= 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t <= 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ~<=~ 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~<=~ 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Aztec Ct ';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Aztec Ct ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t = 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t >= 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t >= 'Worth St ';
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EXPLAIN (COSTS OFF)
|
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SELECT count(*) FROM radix_text_tbl WHERE t ~>=~ 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~>=~ 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t > 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t > 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ~>~ 'Worth St ';
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SELECT count(*) FROM radix_text_tbl WHERE t ~>~ 'Worth St ';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE t ^@ 'Worth';
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SELECT count(*) FROM radix_text_tbl WHERE t ^@ 'Worth';
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM radix_text_tbl WHERE starts_with(t, 'Worth');
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SELECT count(*) FROM radix_text_tbl WHERE starts_with(t, 'Worth');
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RESET enable_seqscan;
|
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RESET enable_indexscan;
|
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RESET enable_bitmapscan;
|