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24 lines
1.2 KiB
SQL
24 lines
1.2 KiB
SQL
SELECT count() > 3 FROM (EXPLAIN PIPELINE header = 1 SELECT * FROM system.numbers ORDER BY number DESC) WHERE explain LIKE '%Header: number UInt64%';
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SELECT count() > 0 FROM (EXPLAIN PLAN SELECT * FROM system.numbers ORDER BY number DESC) WHERE explain ILIKE '%Sort%';
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SELECT count() > 0 FROM (EXPLAIN SELECT * FROM system.numbers ORDER BY number DESC) WHERE explain ILIKE '%Sort%';
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SELECT count() > 0 FROM (EXPLAIN CURRENT TRANSACTION);
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SELECT count() == 1 FROM (EXPLAIN SYNTAX SELECT number FROM system.numbers ORDER BY number DESC) WHERE explain ILIKE 'SELECT%';
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SELECT trim(explain) == 'Asterisk' FROM (EXPLAIN AST SELECT * FROM system.numbers LIMIT 10) WHERE explain LIKE '%Asterisk%';
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SELECT * FROM (
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EXPLAIN AST SELECT * FROM (
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EXPLAIN PLAN SELECT * FROM (
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EXPLAIN SYNTAX SELECT trim(explain) == 'Asterisk' FROM (
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EXPLAIN AST SELECT * FROM system.numbers LIMIT 10
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) WHERE explain LIKE '%Asterisk%'
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)
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)
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) FORMAT Null;
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CREATE TABLE t1 ( a UInt64 ) Engine = MergeTree ORDER BY tuple() AS SELECT number AS a FROM system.numbers LIMIT 100000;
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SELECT rows > 1000 FROM (EXPLAIN ESTIMATE SELECT sum(a) FROM t1);
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SELECT count() == 1 FROM (EXPLAIN ESTIMATE SELECT sum(a) FROM t1);
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DROP TABLE IF EXISTS t1;
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