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24 lines
992 B
SQL
24 lines
992 B
SQL
-- Tags: no-parallel
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-- Tag no-parallel: Messes with internal cache
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SET allow_experimental_analyzer = 1;
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SYSTEM DROP QUERY CACHE;
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-- Run a silly query with a non-trivial plan and put the result into the query cache QC
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SELECT 1 + number from system.numbers LIMIT 1 SETTINGS use_query_cache = true;
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SELECT count(*) FROM system.query_cache;
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-- EXPLAIN PLAN should show the same regardless if the result is calculated or read from the QC
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EXPLAIN PLAN SELECT 1 + number from system.numbers LIMIT 1;
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EXPLAIN PLAN SELECT 1 + number from system.numbers LIMIT 1 SETTINGS use_query_cache = true; -- (*)
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-- EXPLAIN PIPELINE should show the same regardless if the result is calculated or read from the QC
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EXPLAIN PIPELINE SELECT 1 + number from system.numbers LIMIT 1;
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EXPLAIN PIPELINE SELECT 1 + number from system.numbers LIMIT 1 SETTINGS use_query_cache = true; -- (*)
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-- Statements (*) must not cache their results into the QC
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SELECT count(*) FROM system.query_cache;
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SYSTEM DROP QUERY CACHE;
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