mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-15 12:14:18 +00:00
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%';
|
|
SELECT count() > 0 FROM (EXPLAIN PLAN SELECT * FROM system.numbers ORDER BY number DESC) WHERE explain ILIKE '%Sort%';
|
|
SELECT count() > 0 FROM (EXPLAIN SELECT * FROM system.numbers ORDER BY number DESC) WHERE explain ILIKE '%Sort%';
|
|
SELECT count() > 0 FROM (EXPLAIN CURRENT TRANSACTION);
|
|
SELECT count() == 1 FROM (EXPLAIN SYNTAX SELECT number FROM system.numbers ORDER BY number DESC) WHERE explain ILIKE 'SELECT%';
|
|
SELECT trim(explain) == 'Asterisk' FROM (EXPLAIN AST SELECT * FROM system.numbers LIMIT 10) WHERE explain LIKE '%Asterisk%';
|
|
|
|
SELECT * FROM (
|
|
EXPLAIN AST SELECT * FROM (
|
|
EXPLAIN PLAN SELECT * FROM (
|
|
EXPLAIN SYNTAX SELECT trim(explain) == 'Asterisk' FROM (
|
|
EXPLAIN AST SELECT * FROM system.numbers LIMIT 10
|
|
) WHERE explain LIKE '%Asterisk%'
|
|
)
|
|
)
|
|
) FORMAT Null;
|
|
|
|
CREATE TABLE t1 ( a UInt64 ) Engine = MergeTree ORDER BY tuple() AS SELECT number AS a FROM system.numbers LIMIT 100000;
|
|
|
|
SELECT rows > 1000 FROM (EXPLAIN ESTIMATE SELECT sum(a) FROM t1);
|
|
SELECT count() == 1 FROM (EXPLAIN ESTIMATE SELECT sum(a) FROM t1);
|
|
|
|
DROP TABLE IF EXISTS t1;
|