diff options
Diffstat (limited to 'src/test/regress/sql/stats_ext.sql')
| -rw-r--r-- | src/test/regress/sql/stats_ext.sql | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/regress/sql/stats_ext.sql b/src/test/regress/sql/stats_ext.sql index 6fb37962a72..69d7b71f0eb 100644 --- a/src/test/regress/sql/stats_ext.sql +++ b/src/test/regress/sql/stats_ext.sql @@ -112,6 +112,28 @@ CREATE STATISTICS ab1_a_b_stats ON a, b FROM ab1; ANALYZE ab1; DROP TABLE ab1 CASCADE; +-- Tests for stats with inheritance +CREATE TABLE stxdinh(a int, b int); +CREATE TABLE stxdinh1() INHERITS(stxdinh); +CREATE TABLE stxdinh2() INHERITS(stxdinh); +INSERT INTO stxdinh SELECT mod(a,50), mod(a,100) FROM generate_series(0, 1999) a; +INSERT INTO stxdinh1 SELECT mod(a,100), mod(a,100) FROM generate_series(0, 999) a; +INSERT INTO stxdinh2 SELECT mod(a,100), mod(a,100) FROM generate_series(0, 999) a; +VACUUM ANALYZE stxdinh, stxdinh1, stxdinh2; +-- Ensure non-inherited stats are not applied to inherited query +-- Without stats object, it looks like this +SELECT * FROM check_estimated_rows('SELECT a, b FROM stxdinh* GROUP BY 1, 2'); +SELECT * FROM check_estimated_rows('SELECT a, b FROM stxdinh* WHERE a = 0 AND b = 0'); +CREATE STATISTICS stxdinh ON a, b FROM stxdinh; +VACUUM ANALYZE stxdinh, stxdinh1, stxdinh2; +-- Since the stats object does not include inherited stats, it should not +-- affect the estimates +SELECT * FROM check_estimated_rows('SELECT a, b FROM stxdinh* GROUP BY 1, 2'); +-- Dependencies are applied at individual relations (within append), so +-- this estimate changes a bit because we improve estimates for the parent +SELECT * FROM check_estimated_rows('SELECT a, b FROM stxdinh* WHERE a = 0 AND b = 0'); +DROP TABLE stxdinh, stxdinh1, stxdinh2; + -- basic test for statistics on expressions CREATE TABLE ab1 (a INTEGER, b INTEGER, c TIMESTAMP, d TIMESTAMPTZ); |