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32 lines
1.1 KiB
SQL
32 lines
1.1 KiB
SQL
EXPLAIN PIPELINE SELECT sleep(1);
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SELECT sleep(1) SETTINGS log_processors_profiles=true, log_queries=1, log_queries_min_type='QUERY_FINISH';
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SYSTEM FLUSH LOGS;
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WITH
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(
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SELECT query_id
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FROM system.query_log
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WHERE current_database = currentDatabase() AND Settings['log_processors_profiles']='1'
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) AS query_id_
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SELECT
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name,
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multiIf(
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-- ExpressionTransform executes sleep(),
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-- so IProcessor::work() will spend 1 sec.
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name = 'ExpressionTransform', elapsed_us>=1e6 ? 1 : elapsed_us,
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-- SourceFromSingleChunk, that feed data to ExpressionTransform,
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-- will feed first block and then wait in PortFull.
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name = 'SourceFromSingleChunk', output_wait_elapsed_us>=1e6 ? 1 : output_wait_elapsed_us,
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-- NullSource/LazyOutputFormatLazyOutputFormat are the outputs
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-- so they cannot starts to execute before sleep(1) will be executed.
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input_wait_elapsed_us>=1e6 ? 1 : input_wait_elapsed_us)
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elapsed,
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input_rows,
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input_bytes,
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output_rows,
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output_bytes
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FROM system.processors_profile_log
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WHERE query_id = query_id_
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ORDER BY name;
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