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32 lines
1.9 KiB
SQL
32 lines
1.9 KiB
SQL
SET convert_query_to_cnf = 1;
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SET optimize_using_constraints = 1;
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SET optimize_append_index = 0;
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DROP TABLE IF EXISTS t_constraints_where;
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CREATE TABLE t_constraints_where(a UInt32, b UInt32, CONSTRAINT c1 ASSUME b >= 5, CONSTRAINT c2 ASSUME b <= 10) ENGINE = Memory;
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INSERT INTO t_constraints_where VALUES (1, 7);
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EXPLAIN SYNTAX SELECT count() FROM t_constraints_where WHERE b > 15; -- assumption -> 0
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EXPLAIN QUERY TREE SELECT count() FROM t_constraints_where WHERE b > 15 SETTINGS enable_analyzer = 1; -- assumption -> 0
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EXPLAIN SYNTAX SELECT count() FROM t_constraints_where WHERE b = 20; -- assumption -> 0
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EXPLAIN QUERY TREE SELECT count() FROM t_constraints_where WHERE b = 20 SETTINGS enable_analyzer = 1; -- assumption -> 0
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EXPLAIN SYNTAX SELECT count() FROM t_constraints_where WHERE b < 2; -- assumption -> 0
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EXPLAIN QUERY TREE SELECT count() FROM t_constraints_where WHERE b < 2 SETTINGS enable_analyzer = 1; -- assumption -> 0
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EXPLAIN SYNTAX SELECT count() FROM t_constraints_where WHERE b > 20 OR b < 8; -- assumption -> remove (b < 20)
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EXPLAIN QUERY TREE SELECT count() FROM t_constraints_where WHERE b > 20 OR b < 8 SETTINGS enable_analyzer = 1; -- assumption -> remove (b < 20)
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EXPLAIN SYNTAX SELECT count() FROM t_constraints_where PREWHERE b > 20 OR b < 8; -- assumption -> remove (b < 20)
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EXPLAIN QUERY TREE SELECT count() FROM t_constraints_where PREWHERE b > 20 OR b < 8 SETTINGS enable_analyzer = 1; -- assumption -> remove (b < 20)
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DROP TABLE t_constraints_where;
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CREATE TABLE t_constraints_where(a UInt32, b UInt32, CONSTRAINT c1 ASSUME b < 10) ENGINE = Memory;
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INSERT INTO t_constraints_where VALUES (1, 7);
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EXPLAIN SYNTAX SELECT count() FROM t_constraints_where WHERE b = 1 OR b < 18 OR b > 5; -- assumption -> (b < 20) -> 0;
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EXPLAIN QUERY TREE SELECT count() FROM t_constraints_where WHERE b = 1 OR b < 18 OR b > 5 SETTINGS enable_analyzer = 1; -- assumption -> (b < 20) -> 0;
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DROP TABLE t_constraints_where;
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