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Test for checking time limit in index analysis
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5
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03176_q1 1 0 0
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03176_q2 1 2 0
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03176_q3 0 1 1
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-- Tags: no-parallel, no-tsan, no-asan, no-ubsan, no-msan, no-debug, no-fasttest
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-- no-parallel because the test uses failpoint
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CREATE TABLE t_03176(k UInt64, v UInt64) ENGINE=MergeTree() ORDER BY k PARTITION BY k;
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INSERT INTO t_03176 SELECT number, number FROM numbers(5);
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-- Table is partitioned by k to so it will have 5 partitions
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SELECT count() FROM system.parts WHERE database = currentDatabase() AND table = 't_03176' AND active;
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-- This query is fast without failpoint: should take < 1 sec
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EXPLAIN indexes = 1 SELECT * FROM t_03176 ORDER BY k LIMIT 5 SETTINGS log_comment = '03176_q1' FORMAT Null;
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SYSTEM ENABLE FAILPOINT slowdown_index_analysis;
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-- Check that failpont actually works: the query should take >= 5 sec
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EXPLAIN indexes = 1 SELECT * FROM t_03176 ORDER BY k LIMIT 5 SETTINGS log_comment = '03176_q2' FORMAT Null;
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-- Now the query should be cancelled after about 1 sec
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EXPLAIN indexes = 1 SELECT * FROM t_03176 ORDER BY k LIMIT 5 SETTINGS log_comment = '03176_q3', max_execution_time = 1.1 FORMAT Null; -- { serverError TIMEOUT_EXCEEDED }
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SYSTEM DISABLE FAILPOINT slowdown_index_analysis;
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SYSTEM FLUSH LOGS;
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-- Check that q1 was fast, q2 was slow and q3 had timeout
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SELECT log_comment, type = 'QueryFinish', intDiv(query_duration_ms, 2000), length(exception) > 0
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FROM system.query_log
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WHERE current_database = currentDatabase() AND log_comment LIKE '03176_q_' AND type IN ('QueryFinish', 'ExceptionBeforeStart')
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ORDER BY log_comment;
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DROP TABLE t_03176;
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