ClickHouse/dbms/tests/queries/0_stateless/00745_compile_scalar_subquery.sql
Ivan 118bea2be6
Enable predicate push-down optimization by default. (#4846)
* Enable predicate push-down optimization by default.
* Forbid push-downs for some JOIN cases.
* Fix existing tests
* Forbid optimization if a select query has ARRAY JOIN on any side.
2019-04-18 13:39:25 +03:00

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SQL

SET compile_expressions = 1;
SET min_count_to_compile_expression = 1;
SET optimize_move_to_prewhere = 0;
DROP TABLE IF EXISTS dt;
DROP TABLE IF EXISTS testx;
CREATE TABLE dt(tkey Int32) ENGINE = MergeTree order by tuple();
INSERT INTO dt VALUES (300000);
CREATE TABLE testx(t Int32, a UInt8) ENGINE = MergeTree ORDER BY tuple();
INSERT INTO testx VALUES (100000, 0);
SELECT COUNT(*) FROM testx WHERE NOT a AND t < (SELECT tkey FROM dt);
DROP TABLE dt;
CREATE TABLE dt(tkey Int32) ENGINE = MergeTree order by tuple();
INSERT INTO dt VALUES (0);
SELECT COUNT(*) FROM testx WHERE NOT a AND t < (SELECT tkey FROM dt);
DROP TABLE IF EXISTS dt;
DROP TABLE IF EXISTS testx;