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contrib/tsm_system_rows

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Simon Riggs
2015-05-15 15:31:14 -04:00
parent 149f6f1576
commit 4d40494b11
7 changed files with 390 additions and 0 deletions
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contrib/tsm_system_rows/sql/tsm_system_rows.sql Normal file
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CREATE EXTENSION tsm_system_rows;
CREATE TABLE test_tablesample (id int, name text) WITH (fillfactor=10); -- force smaller pages so we don't have to load too much data to get multiple pages
INSERT INTO test_tablesample SELECT i, repeat(i::text, 1000) FROM generate_series(0, 30) s(i) ORDER BY i;
ANALYZE test_tablesample;
SELECT count(*) FROM test_tablesample TABLESAMPLE system_rows (1000);
SELECT id FROM test_tablesample TABLESAMPLE system_rows (8) REPEATABLE (5432);
EXPLAIN SELECT id FROM test_tablesample TABLESAMPLE system_rows (20) REPEATABLE (10);
-- done
DROP TABLE test_tablesample CASCADE;