ClickHouse/tests/queries/0_stateless/00950_default_prewhere.sql

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DROP TABLE IF EXISTS test_generic_events_all;
CREATE TABLE test_generic_events_all (APIKey UInt8, SessionType UInt8) ENGINE = MergeTree() PARTITION BY APIKey ORDER BY tuple();
INSERT INTO test_generic_events_all VALUES( 42, 42 );
ALTER TABLE test_generic_events_all ADD COLUMN OperatingSystem UInt64 DEFAULT 42;
SELECT OperatingSystem FROM test_generic_events_all PREWHERE APIKey = 42 WHERE SessionType = 42;
SELECT * FROM test_generic_events_all PREWHERE APIKey = 42 WHERE SessionType = 42;
DROP TABLE IF EXISTS test_generic_events_all;
CREATE TABLE test_generic_events_all (APIKey UInt8, SessionType UInt8) ENGINE = MergeTree() PARTITION BY APIKey ORDER BY tuple();
INSERT INTO test_generic_events_all VALUES( 42, 42 );
ALTER TABLE test_generic_events_all ADD COLUMN OperatingSystem UInt64 DEFAULT SessionType+1;
SELECT * FROM test_generic_events_all WHERE APIKey = 42 AND SessionType = 42;
SELECT OperatingSystem FROM test_generic_events_all WHERE APIKey = 42;
SELECT OperatingSystem FROM test_generic_events_all WHERE APIKey = 42 AND SessionType = 42;
SELECT OperatingSystem FROM test_generic_events_all PREWHERE APIKey = 42 WHERE SessionType = 42;
SELECT * FROM test_generic_events_all PREWHERE APIKey = 42 WHERE SessionType = 42;
DROP TABLE IF EXISTS test_generic_events_all;