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60 lines
2.3 KiB
SQL
60 lines
2.3 KiB
SQL
-- Tests that various DDL statements create/drop/materialize statistics
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DROP TABLE IF EXISTS tab;
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SET allow_experimental_statistics = 1;
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SET allow_statistics_optimize = 1;
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CREATE TABLE tab
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(
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a Float64 STATISTICS(tdigest),
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b Int64 STATISTICS(tdigest),
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pk String,
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) Engine = MergeTree() ORDER BY pk
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SETTINGS min_bytes_for_wide_part = 0;
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SHOW CREATE TABLE tab;
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INSERT INTO tab select number, -number, generateUUIDv4() FROM system.numbers LIMIT 10000;
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SELECT 'After insert';
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SELECT replaceRegexpAll(explain, '__table1\.|_UInt8', '') FROM (EXPLAIN actions=1 SELECT count(*) FROM tab WHERE b < 10 and a < 10) WHERE explain LIKE '%Prewhere%' OR explain LIKE '%Filter column%';
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SELECT count(*) FROM tab WHERE b < 10 and a < 10;
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SELECT count(*) FROM tab WHERE b < NULL and a < '10';
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ALTER TABLE tab DROP STATISTICS a, b;
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SELECT 'After drop statistic';
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SELECT replaceRegexpAll(explain, '__table1\.|_UInt8', '') FROM (EXPLAIN actions=1 SELECT count(*) FROM tab WHERE b < 10 and a < 10) WHERE explain LIKE '%Prewhere%' OR explain LIKE '%Filter column%';
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SELECT count(*) FROM tab WHERE b < 10 and a < 10;
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SHOW CREATE TABLE tab;
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ALTER TABLE tab ADD STATISTICS a, b TYPE tdigest;
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SELECT 'After add statistic';
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SHOW CREATE TABLE tab;
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ALTER TABLE tab MATERIALIZE STATISTICS a, b;
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INSERT INTO tab select number, -number, generateUUIDv4() FROM system.numbers LIMIT 10000;
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SELECT 'After materialize statistic';
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SELECT replaceRegexpAll(explain, '__table1\.|_UInt8', '') FROM (EXPLAIN actions=1 SELECT count(*) FROM tab WHERE b < 10 and a < 10) WHERE explain LIKE '%Prewhere%' OR explain LIKE '%Filter column%';
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SELECT count(*) FROM tab WHERE b < 10 and a < 10;
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OPTIMIZE TABLE tab FINAL;
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SELECT 'After merge';
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SELECT replaceRegexpAll(explain, '__table1\.|_UInt8', '') FROM (EXPLAIN actions=1 SELECT count(*) FROM tab WHERE b < 10 and a < 10) WHERE explain LIKE '%Prewhere%' OR explain LIKE '%Filter column%';
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SELECT count(*) FROM tab WHERE b < 10 and a < 10;
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ALTER TABLE tab RENAME COLUMN b TO c;
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SHOW CREATE TABLE tab;
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SELECT 'After rename';
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SELECT replaceRegexpAll(explain, '__table1\.|_UInt8', '') FROM (EXPLAIN actions=1 SELECT count(*) FROM tab WHERE c < 10 and a < 10) WHERE explain LIKE '%Prewhere%' OR explain LIKE '%Filter column%';
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SELECT count(*) FROM tab WHERE c < 10 and a < 10;
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DROP TABLE IF EXISTS tab;
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