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Stabilize stats_ext test with other collations
The tests used string concatenation to test statistics on expressions, but that made the tests locale-dependent, e.g. because the ordering of '11' and '1X' depends on the collation. This affected both the estimated and actual row couts, breaking some of the tests. Fixed by replacing the string concatenation with upper() function call, so that the text values contain only digits. Discussion: https://postgr.es/m/b650920b-2767-fbc3-c87a-cb8b5d693cbf%40enterprisedb.com
This commit is contained in:
Tomas Vondra
parent
8df2f37114
commit
2a058e938c
@ -1335,119 +1335,119 @@ SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE
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DROP STATISTICS func_deps_stat;
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-- now try functional dependencies with expressions
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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1 | 50
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND (b || ''X'') = ''1X'' AND (c + 1) = 2');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND upper(b) = ''1'' AND (c + 1) = 2');
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estimated | actual
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-----------+--------
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1 | 50
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(1 row)
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-- IN
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') IN (''1X'', ''2X'')');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) IN (''1'', ''2'')');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') IN (''1X'', ''2X'')');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) IN (''1'', ''2'')');
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estimated | actual
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-----------+--------
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1 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND (b || ''X'') IN (''1X'', ''26X'') AND (c + 1) = 2');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND upper(b) IN (''1'', ''26'') AND (c + 1) = 2');
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estimated | actual
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-----------+--------
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1 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND (b || ''X'') IN (''1X'', ''26X'') AND (c + 1) IN (2)');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND upper(b) IN (''1'', ''26'') AND (c + 1) IN (2)');
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estimated | actual
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-----------+--------
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1 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 52, 54, 102, 104, 152, 154) AND (b || ''X'') IN (''1X'', ''2X'', ''26X'', ''27X'') AND (c + 1) IN (2, 3)');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 52, 54, 102, 104, 152, 154) AND upper(b) IN (''1'', ''2'', ''26'', ''27'') AND (c + 1) IN (2, 3)');
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estimated | actual
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-----------+--------
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1 | 400
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(1 row)
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-- OR clauses referencing the same attribute
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND ((b || ''X'') = ''1X'' OR (b || ''X'') = ''2X'')');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (upper(b) = ''1'' OR upper(b) = ''2'')');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND ((b || ''X'') = ''1X'' OR (b || ''X'') = ''2X'')');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND (upper(b) = ''1'' OR upper(b) = ''2'')');
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estimated | actual
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-----------+--------
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1 | 200
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(1 row)
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-- OR clauses referencing different attributes
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (b || ''X'') = ''1X'') AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR upper(b) = ''1'') AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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-- ANY
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X''])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND upper(b) = ANY (ARRAY[''1'', ''2''])');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 102, 104]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X''])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 102, 104]) AND upper(b) = ANY (ARRAY[''1'', ''2''])');
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estimated | actual
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-----------+--------
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1 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''26X'']) AND (c + 1) = 2');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND upper(b) = ANY (ARRAY[''1'', ''26'']) AND (c + 1) = 2');
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estimated | actual
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-----------+--------
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1 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''26X'']) AND (c + 1) = ANY (ARRAY[2])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND upper(b) = ANY (ARRAY[''1'', ''26'']) AND (c + 1) = ANY (ARRAY[2])');
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estimated | actual
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-----------+--------
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1 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 52, 54, 102, 104, 152, 154]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X'', ''26X'', ''27X'']) AND (c + 1) = ANY (ARRAY[2, 3])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 52, 54, 102, 104, 152, 154]) AND upper(b) = ANY (ARRAY[''1'', ''2'', ''26'', ''27'']) AND (c + 1) = ANY (ARRAY[2, 3])');
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estimated | actual
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-----------+--------
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1 | 400
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@ -1455,45 +1455,45 @@ SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE
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-- ANY with inequalities should not benefit from functional dependencies
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-- the estimates however improve thanks to having expression statistics
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) < ANY (ARRAY[2, 102]) AND (b || ''X'') > ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) < ANY (ARRAY[2, 102]) AND upper(b) > ''1''');
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estimated | actual
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-----------+--------
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926 | 1900
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926 | 2400
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) >= ANY (ARRAY[2, 102]) AND (b || ''X'') <= ANY (ARRAY[''1X'', ''2X''])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) >= ANY (ARRAY[2, 102]) AND upper(b) <= ANY (ARRAY[''1'', ''2''])');
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estimated | actual
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-----------+--------
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1543 | 2250
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1543 | 1250
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) <= ANY (ARRAY[2, 4, 102, 104]) AND (b || ''X'') >= ANY (ARRAY[''1X'', ''2X''])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) <= ANY (ARRAY[2, 4, 102, 104]) AND upper(b) >= ANY (ARRAY[''1'', ''2''])');
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estimated | actual
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-----------+--------
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2229 | 2050
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2229 | 2550
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(1 row)
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-- ALL (should not benefit from functional dependencies)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ALL (ARRAY[''1X''])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ALL (ARRAY[''1''])');
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estimated | actual
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-----------+--------
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1 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ALL (ARRAY[''1X'', ''2X''])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ALL (ARRAY[''1'', ''2''])');
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estimated | actual
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-----------+--------
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1 | 0
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') = ALL (ARRAY[''1X'', ''2X''])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) = ALL (ARRAY[''1'', ''2''])');
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estimated | actual
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-----------+--------
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1 | 0
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(1 row)
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-- create statistics on expressions
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CREATE STATISTICS func_deps_stat (dependencies) ON (a * 2), (b || 'X'), (c + 1) FROM functional_dependencies;
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CREATE STATISTICS func_deps_stat (dependencies) ON (a * 2), upper(b), (c + 1) FROM functional_dependencies;
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ANALYZE functional_dependencies;
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-- print the detected dependencies
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SELECT dependencies FROM pg_stats_ext WHERE statistics_name = 'func_deps_stat';
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@ -1502,119 +1502,119 @@ SELECT dependencies FROM pg_stats_ext WHERE statistics_name = 'func_deps_stat';
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{"-1 => -2": 1.000000, "-1 => -3": 1.000000, "-2 => -3": 1.000000, "-1, -2 => -3": 1.000000, "-1, -3 => -2": 1.000000}
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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50 | 50
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND (b || ''X'') = ''1X'' AND (c + 1) = 2');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND upper(b) = ''1'' AND (c + 1) = 2');
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estimated | actual
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-----------+--------
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50 | 50
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(1 row)
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-- IN
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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100 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') IN (''1X'', ''2X'')');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) IN (''1'', ''2'')');
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estimated | actual
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-----------+--------
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100 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') IN (''1X'', ''2X'')');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) IN (''1'', ''2'')');
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estimated | actual
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-----------+--------
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200 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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100 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND (b || ''X'') IN (''1X'', ''26X'') AND (c + 1) = 2');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND upper(b) IN (''1'', ''26'') AND (c + 1) = 2');
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estimated | actual
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-----------+--------
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200 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND (b || ''X'') IN (''1X'', ''26X'') AND (c + 1) IN (2)');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND upper(b) IN (''1'', ''26'') AND (c + 1) IN (2)');
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estimated | actual
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-----------+--------
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200 | 200
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 52, 54, 102, 104, 152, 154) AND (b || ''X'') IN (''1X'', ''2X'', ''26X'', ''27X'') AND (c + 1) IN (2, 3)');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 52, 54, 102, 104, 152, 154) AND upper(b) IN (''1'', ''2'', ''26'', ''27'') AND (c + 1) IN (2, 3)');
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estimated | actual
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-----------+--------
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400 | 400
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(1 row)
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-- OR clauses referencing the same attribute
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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99 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND ((b || ''X'') = ''1X'' OR (b || ''X'') = ''2X'')');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (upper(b) = ''1'' OR upper(b) = ''2'')');
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estimated | actual
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-----------+--------
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99 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND ((b || ''X'') = ''1X'' OR (b || ''X'') = ''2X'')');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND (upper(b) = ''1'' OR upper(b) = ''2'')');
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estimated | actual
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-----------+--------
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197 | 200
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(1 row)
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-- OR clauses referencing different attributes
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (b || ''X'') = ''1X'') AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR upper(b) = ''1'') AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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3 | 100
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(1 row)
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-- ANY
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND (b || ''X'') = ''1X''');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND upper(b) = ''1''');
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estimated | actual
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-----------+--------
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100 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X''])');
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND upper(b) = ANY (ARRAY[''1'', ''2''])');
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estimated | actual
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-----------+--------
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100 | 100
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(1 row)
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SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 102, 104]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 102, 104]) AND upper(b) = ANY (ARRAY[''1'', ''2''])');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
200 | 200
|
||||
(1 row)
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''26X'']) AND (c + 1) = 2');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND upper(b) = ANY (ARRAY[''1'', ''26'']) AND (c + 1) = 2');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
200 | 200
|
||||
(1 row)
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''26X'']) AND (c + 1) = ANY (ARRAY[2])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND upper(b) = ANY (ARRAY[''1'', ''26'']) AND (c + 1) = ANY (ARRAY[2])');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
200 | 200
|
||||
(1 row)
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 52, 54, 102, 104, 152, 154]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X'', ''26X'', ''27X'']) AND (c + 1) = ANY (ARRAY[2, 3])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 52, 54, 102, 104, 152, 154]) AND upper(b) = ANY (ARRAY[''1'', ''2'', ''26'', ''27'']) AND (c + 1) = ANY (ARRAY[2, 3])');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
400 | 400
|
||||
@ -1622,38 +1622,38 @@ SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE
|
||||
|
||||
-- ANY with inequalities should not benefit from functional dependencies
|
||||
-- the estimates however improve thanks to having expression statistics
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) < ANY (ARRAY[2, 102]) AND (b || ''X'') > ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) < ANY (ARRAY[2, 102]) AND upper(b) > ''1''');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
1957 | 1900
|
||||
2472 | 2400
|
||||
(1 row)
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) >= ANY (ARRAY[2, 102]) AND (b || ''X'') <= ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) >= ANY (ARRAY[2, 102]) AND upper(b) <= ANY (ARRAY[''1'', ''2''])');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
2933 | 2250
|
||||
1441 | 1250
|
||||
(1 row)
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) <= ANY (ARRAY[2, 4, 102, 104]) AND (b || ''X'') >= ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) <= ANY (ARRAY[2, 4, 102, 104]) AND upper(b) >= ANY (ARRAY[''1'', ''2''])');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
3548 | 2050
|
||||
3909 | 2550
|
||||
(1 row)
|
||||
|
||||
-- ALL (should not benefit from functional dependencies)
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ALL (ARRAY[''1X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ALL (ARRAY[''1''])');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
2 | 100
|
||||
(1 row)
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ALL (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ALL (ARRAY[''1'', ''2''])');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
1 | 0
|
||||
(1 row)
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') = ALL (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) = ALL (ARRAY[''1'', ''2''])');
|
||||
estimated | actual
|
||||
-----------+--------
|
||||
1 | 0
|
||||
@ -2969,21 +2969,21 @@ create statistics stts_s2.stts_yama (dependencies, mcv) on col1, col3 from stts_
|
||||
insert into stts_t1 select i,i from generate_series(1,100) i;
|
||||
analyze stts_t1;
|
||||
\dX
|
||||
List of extended statistics
|
||||
Schema | Name | Definition | Ndistinct | Dependencies | MCV
|
||||
----------+------------------------+----------------------------------------------------------------------------------+-----------+--------------+---------
|
||||
public | func_deps_stat | ((a * 2)), ((b || 'X'::text)), ((c + (1)::numeric)) FROM functional_dependencies | | defined |
|
||||
public | mcv_lists_arrays_stats | a, b, c FROM mcv_lists_arrays | | | defined
|
||||
public | mcv_lists_bool_stats | a, b, c FROM mcv_lists_bool | | | defined
|
||||
public | mcv_lists_stats | a, b, d FROM mcv_lists | | | defined
|
||||
public | stts_1 | a, b FROM stts_t1 | defined | |
|
||||
public | stts_2 | a, b FROM stts_t1 | defined | defined |
|
||||
public | stts_3 | a, b FROM stts_t1 | defined | defined | defined
|
||||
public | stts_4 | b, c FROM stts_t2 | defined | defined | defined
|
||||
public | stts_hoge | col1, col2, col3 FROM stts_t3 | defined | defined | defined
|
||||
stts_s1 | stts_foo | col1, col2 FROM stts_t3 | defined | defined | defined
|
||||
stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | defined | defined
|
||||
tststats | priv_test_stats | a, b FROM tststats.priv_test_tbl | | | defined
|
||||
List of extended statistics
|
||||
Schema | Name | Definition | Ndistinct | Dependencies | MCV
|
||||
----------+------------------------+------------------------------------------------------------------------+-----------+--------------+---------
|
||||
public | func_deps_stat | ((a * 2)), upper(b), ((c + (1)::numeric)) FROM functional_dependencies | | defined |
|
||||
public | mcv_lists_arrays_stats | a, b, c FROM mcv_lists_arrays | | | defined
|
||||
public | mcv_lists_bool_stats | a, b, c FROM mcv_lists_bool | | | defined
|
||||
public | mcv_lists_stats | a, b, d FROM mcv_lists | | | defined
|
||||
public | stts_1 | a, b FROM stts_t1 | defined | |
|
||||
public | stts_2 | a, b FROM stts_t1 | defined | defined |
|
||||
public | stts_3 | a, b FROM stts_t1 | defined | defined | defined
|
||||
public | stts_4 | b, c FROM stts_t2 | defined | defined | defined
|
||||
public | stts_hoge | col1, col2, col3 FROM stts_t3 | defined | defined | defined
|
||||
stts_s1 | stts_foo | col1, col2 FROM stts_t3 | defined | defined | defined
|
||||
stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | defined | defined
|
||||
tststats | priv_test_stats | a, b FROM tststats.priv_test_tbl | | | defined
|
||||
(12 rows)
|
||||
|
||||
\dX stts_?
|
||||
@ -3004,21 +3004,21 @@ analyze stts_t1;
|
||||
(1 row)
|
||||
|
||||
\dX+
|
||||
List of extended statistics
|
||||
Schema | Name | Definition | Ndistinct | Dependencies | MCV
|
||||
----------+------------------------+----------------------------------------------------------------------------------+-----------+--------------+---------
|
||||
public | func_deps_stat | ((a * 2)), ((b || 'X'::text)), ((c + (1)::numeric)) FROM functional_dependencies | | defined |
|
||||
public | mcv_lists_arrays_stats | a, b, c FROM mcv_lists_arrays | | | defined
|
||||
public | mcv_lists_bool_stats | a, b, c FROM mcv_lists_bool | | | defined
|
||||
public | mcv_lists_stats | a, b, d FROM mcv_lists | | | defined
|
||||
public | stts_1 | a, b FROM stts_t1 | defined | |
|
||||
public | stts_2 | a, b FROM stts_t1 | defined | defined |
|
||||
public | stts_3 | a, b FROM stts_t1 | defined | defined | defined
|
||||
public | stts_4 | b, c FROM stts_t2 | defined | defined | defined
|
||||
public | stts_hoge | col1, col2, col3 FROM stts_t3 | defined | defined | defined
|
||||
stts_s1 | stts_foo | col1, col2 FROM stts_t3 | defined | defined | defined
|
||||
stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | defined | defined
|
||||
tststats | priv_test_stats | a, b FROM tststats.priv_test_tbl | | | defined
|
||||
List of extended statistics
|
||||
Schema | Name | Definition | Ndistinct | Dependencies | MCV
|
||||
----------+------------------------+------------------------------------------------------------------------+-----------+--------------+---------
|
||||
public | func_deps_stat | ((a * 2)), upper(b), ((c + (1)::numeric)) FROM functional_dependencies | | defined |
|
||||
public | mcv_lists_arrays_stats | a, b, c FROM mcv_lists_arrays | | | defined
|
||||
public | mcv_lists_bool_stats | a, b, c FROM mcv_lists_bool | | | defined
|
||||
public | mcv_lists_stats | a, b, d FROM mcv_lists | | | defined
|
||||
public | stts_1 | a, b FROM stts_t1 | defined | |
|
||||
public | stts_2 | a, b FROM stts_t1 | defined | defined |
|
||||
public | stts_3 | a, b FROM stts_t1 | defined | defined | defined
|
||||
public | stts_4 | b, c FROM stts_t2 | defined | defined | defined
|
||||
public | stts_hoge | col1, col2, col3 FROM stts_t3 | defined | defined | defined
|
||||
stts_s1 | stts_foo | col1, col2 FROM stts_t3 | defined | defined | defined
|
||||
stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | defined | defined
|
||||
tststats | priv_test_stats | a, b FROM tststats.priv_test_tbl | | | defined
|
||||
(12 rows)
|
||||
|
||||
\dX+ stts_?
|
||||
@ -3048,21 +3048,21 @@ analyze stts_t1;
|
||||
create role regress_stats_ext nosuperuser;
|
||||
set role regress_stats_ext;
|
||||
\dX
|
||||
List of extended statistics
|
||||
Schema | Name | Definition | Ndistinct | Dependencies | MCV
|
||||
----------+------------------------+----------------------------------------------------------------------------------+-----------+--------------+---------
|
||||
public | func_deps_stat | ((a * 2)), ((b || 'X'::text)), ((c + (1)::numeric)) FROM functional_dependencies | | defined |
|
||||
public | mcv_lists_arrays_stats | a, b, c FROM mcv_lists_arrays | | | defined
|
||||
public | mcv_lists_bool_stats | a, b, c FROM mcv_lists_bool | | | defined
|
||||
public | mcv_lists_stats | a, b, d FROM mcv_lists | | | defined
|
||||
public | stts_1 | a, b FROM stts_t1 | defined | |
|
||||
public | stts_2 | a, b FROM stts_t1 | defined | defined |
|
||||
public | stts_3 | a, b FROM stts_t1 | defined | defined | defined
|
||||
public | stts_4 | b, c FROM stts_t2 | defined | defined | defined
|
||||
public | stts_hoge | col1, col2, col3 FROM stts_t3 | defined | defined | defined
|
||||
stts_s1 | stts_foo | col1, col2 FROM stts_t3 | defined | defined | defined
|
||||
stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | defined | defined
|
||||
tststats | priv_test_stats | a, b FROM tststats.priv_test_tbl | | | defined
|
||||
List of extended statistics
|
||||
Schema | Name | Definition | Ndistinct | Dependencies | MCV
|
||||
----------+------------------------+------------------------------------------------------------------------+-----------+--------------+---------
|
||||
public | func_deps_stat | ((a * 2)), upper(b), ((c + (1)::numeric)) FROM functional_dependencies | | defined |
|
||||
public | mcv_lists_arrays_stats | a, b, c FROM mcv_lists_arrays | | | defined
|
||||
public | mcv_lists_bool_stats | a, b, c FROM mcv_lists_bool | | | defined
|
||||
public | mcv_lists_stats | a, b, d FROM mcv_lists | | | defined
|
||||
public | stts_1 | a, b FROM stts_t1 | defined | |
|
||||
public | stts_2 | a, b FROM stts_t1 | defined | defined |
|
||||
public | stts_3 | a, b FROM stts_t1 | defined | defined | defined
|
||||
public | stts_4 | b, c FROM stts_t2 | defined | defined | defined
|
||||
public | stts_hoge | col1, col2, col3 FROM stts_t3 | defined | defined | defined
|
||||
stts_s1 | stts_foo | col1, col2 FROM stts_t3 | defined | defined | defined
|
||||
stts_s2 | stts_yama | col1, col3 FROM stts_t3 | | defined | defined
|
||||
tststats | priv_test_stats | a, b FROM tststats.priv_test_tbl | | | defined
|
||||
(12 rows)
|
||||
|
||||
reset role;
|
||||
|
||||
@ -696,127 +696,127 @@ DROP STATISTICS func_deps_stat;
|
||||
|
||||
-- now try functional dependencies with expressions
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND (b || ''X'') = ''1X'' AND (c + 1) = 2');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND upper(b) = ''1'' AND (c + 1) = 2');
|
||||
|
||||
-- IN
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') IN (''1X'', ''2X'')');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) IN (''1'', ''2'')');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') IN (''1X'', ''2X'')');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) IN (''1'', ''2'')');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND (b || ''X'') IN (''1X'', ''26X'') AND (c + 1) = 2');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND upper(b) IN (''1'', ''26'') AND (c + 1) = 2');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND (b || ''X'') IN (''1X'', ''26X'') AND (c + 1) IN (2)');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND upper(b) IN (''1'', ''26'') AND (c + 1) IN (2)');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 52, 54, 102, 104, 152, 154) AND (b || ''X'') IN (''1X'', ''2X'', ''26X'', ''27X'') AND (c + 1) IN (2, 3)');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 52, 54, 102, 104, 152, 154) AND upper(b) IN (''1'', ''2'', ''26'', ''27'') AND (c + 1) IN (2, 3)');
|
||||
|
||||
-- OR clauses referencing the same attribute
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND ((b || ''X'') = ''1X'' OR (b || ''X'') = ''2X'')');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (upper(b) = ''1'' OR upper(b) = ''2'')');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND ((b || ''X'') = ''1X'' OR (b || ''X'') = ''2X'')');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND (upper(b) = ''1'' OR upper(b) = ''2'')');
|
||||
|
||||
-- OR clauses referencing different attributes
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (b || ''X'') = ''1X'') AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR upper(b) = ''1'') AND upper(b) = ''1''');
|
||||
|
||||
-- ANY
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND upper(b) = ANY (ARRAY[''1'', ''2''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 102, 104]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 102, 104]) AND upper(b) = ANY (ARRAY[''1'', ''2''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''26X'']) AND (c + 1) = 2');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND upper(b) = ANY (ARRAY[''1'', ''26'']) AND (c + 1) = 2');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''26X'']) AND (c + 1) = ANY (ARRAY[2])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND upper(b) = ANY (ARRAY[''1'', ''26'']) AND (c + 1) = ANY (ARRAY[2])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 52, 54, 102, 104, 152, 154]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X'', ''26X'', ''27X'']) AND (c + 1) = ANY (ARRAY[2, 3])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 52, 54, 102, 104, 152, 154]) AND upper(b) = ANY (ARRAY[''1'', ''2'', ''26'', ''27'']) AND (c + 1) = ANY (ARRAY[2, 3])');
|
||||
|
||||
-- ANY with inequalities should not benefit from functional dependencies
|
||||
-- the estimates however improve thanks to having expression statistics
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) < ANY (ARRAY[2, 102]) AND (b || ''X'') > ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) < ANY (ARRAY[2, 102]) AND upper(b) > ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) >= ANY (ARRAY[2, 102]) AND (b || ''X'') <= ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) >= ANY (ARRAY[2, 102]) AND upper(b) <= ANY (ARRAY[''1'', ''2''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) <= ANY (ARRAY[2, 4, 102, 104]) AND (b || ''X'') >= ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) <= ANY (ARRAY[2, 4, 102, 104]) AND upper(b) >= ANY (ARRAY[''1'', ''2''])');
|
||||
|
||||
-- ALL (should not benefit from functional dependencies)
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ALL (ARRAY[''1X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ALL (ARRAY[''1''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ALL (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ALL (ARRAY[''1'', ''2''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') = ALL (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) = ALL (ARRAY[''1'', ''2''])');
|
||||
|
||||
-- create statistics on expressions
|
||||
CREATE STATISTICS func_deps_stat (dependencies) ON (a * 2), (b || 'X'), (c + 1) FROM functional_dependencies;
|
||||
CREATE STATISTICS func_deps_stat (dependencies) ON (a * 2), upper(b), (c + 1) FROM functional_dependencies;
|
||||
|
||||
ANALYZE functional_dependencies;
|
||||
|
||||
-- print the detected dependencies
|
||||
SELECT dependencies FROM pg_stats_ext WHERE statistics_name = 'func_deps_stat';
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND (b || ''X'') = ''1X'' AND (c + 1) = 2');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = 2 AND upper(b) = ''1'' AND (c + 1) = 2');
|
||||
|
||||
-- IN
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') IN (''1X'', ''2X'')');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) IN (''1'', ''2'')');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') IN (''1X'', ''2X'')');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) IN (''1'', ''2'')');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND (b || ''X'') IN (''1X'', ''26X'') AND (c + 1) = 2');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND upper(b) IN (''1'', ''26'') AND (c + 1) = 2');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND (b || ''X'') IN (''1X'', ''26X'') AND (c + 1) IN (2)');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 52, 102, 152) AND upper(b) IN (''1'', ''26'') AND (c + 1) IN (2)');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 52, 54, 102, 104, 152, 154) AND (b || ''X'') IN (''1X'', ''2X'', ''26X'', ''27X'') AND (c + 1) IN (2, 3)');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 52, 54, 102, 104, 152, 154) AND upper(b) IN (''1'', ''2'', ''26'', ''27'') AND (c + 1) IN (2, 3)');
|
||||
|
||||
-- OR clauses referencing the same attribute
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND ((b || ''X'') = ''1X'' OR (b || ''X'') = ''2X'')');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 102) AND (upper(b) = ''1'' OR upper(b) = ''2'')');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND ((b || ''X'') = ''1X'' OR (b || ''X'') = ''2X'')');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (a * 2) = 4 OR (a * 2) = 102 OR (a * 2) = 104) AND (upper(b) = ''1'' OR upper(b) = ''2'')');
|
||||
|
||||
-- OR clauses referencing different attributes
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR (b || ''X'') = ''1X'') AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE ((a * 2) = 2 OR upper(b) = ''1'') AND upper(b) = ''1''');
|
||||
|
||||
-- ANY
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND (b || ''X'') = ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND upper(b) = ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 102]) AND upper(b) = ANY (ARRAY[''1'', ''2''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 102, 104]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 102, 104]) AND upper(b) = ANY (ARRAY[''1'', ''2''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''26X'']) AND (c + 1) = 2');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND upper(b) = ANY (ARRAY[''1'', ''26'']) AND (c + 1) = 2');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''26X'']) AND (c + 1) = ANY (ARRAY[2])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 52, 102, 152]) AND upper(b) = ANY (ARRAY[''1'', ''26'']) AND (c + 1) = ANY (ARRAY[2])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 52, 54, 102, 104, 152, 154]) AND (b || ''X'') = ANY (ARRAY[''1X'', ''2X'', ''26X'', ''27X'']) AND (c + 1) = ANY (ARRAY[2, 3])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) = ANY (ARRAY[2, 4, 52, 54, 102, 104, 152, 154]) AND upper(b) = ANY (ARRAY[''1'', ''2'', ''26'', ''27'']) AND (c + 1) = ANY (ARRAY[2, 3])');
|
||||
|
||||
-- ANY with inequalities should not benefit from functional dependencies
|
||||
-- the estimates however improve thanks to having expression statistics
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) < ANY (ARRAY[2, 102]) AND (b || ''X'') > ''1X''');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) < ANY (ARRAY[2, 102]) AND upper(b) > ''1''');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) >= ANY (ARRAY[2, 102]) AND (b || ''X'') <= ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) >= ANY (ARRAY[2, 102]) AND upper(b) <= ANY (ARRAY[''1'', ''2''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) <= ANY (ARRAY[2, 4, 102, 104]) AND (b || ''X'') >= ANY (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) <= ANY (ARRAY[2, 4, 102, 104]) AND upper(b) >= ANY (ARRAY[''1'', ''2''])');
|
||||
|
||||
-- ALL (should not benefit from functional dependencies)
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ALL (ARRAY[''1X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ALL (ARRAY[''1''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND (b || ''X'') = ALL (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 102) AND upper(b) = ALL (ARRAY[''1'', ''2''])');
|
||||
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND (b || ''X'') = ALL (ARRAY[''1X'', ''2X''])');
|
||||
SELECT * FROM check_estimated_rows('SELECT * FROM functional_dependencies WHERE (a * 2) IN (2, 4, 102, 104) AND upper(b) = ALL (ARRAY[''1'', ''2''])');
|
||||
|
||||
-- check the ability to use multiple functional dependencies
|
||||
CREATE TABLE functional_dependencies_multi (
|
||||
|
||||
Loading…
Reference in New Issue
Block a user