mirror of
https://github.com/ClickHouse/ClickHouse.git
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87 lines
4.3 KiB
SQL
87 lines
4.3 KiB
SQL
DROP TABLE IF EXISTS tabc;
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CREATE TABLE tabc (a UInt32, b UInt32 ALIAS a + 1, c UInt32 ALIAS b + 1, s String) ENGINE = MergeTree ORDER BY a;
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INSERT INTO tabc (a, s) SELECT number, 'abc' || toString(number) FROM numbers(4);
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DROP TABLE IF EXISTS ta;
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CREATE TABLE ta (a Int32) ENGINE = MergeTree ORDER BY tuple();
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INSERT INTO ta SELECT number FROM numbers(4);
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DROP TABLE IF EXISTS tb;
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CREATE TABLE tb (b Int32) ENGINE = MergeTree ORDER BY tuple();
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INSERT INTO tb SELECT number FROM numbers(4);
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SET join_use_nulls = 1;
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SET analyzer_compatibility_join_using_top_level_identifier = 1;
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-- { echoOn }
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SELECT 1 AS a FROM tb JOIN tabc USING (a) ORDER BY ALL;
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SELECT a + 2 AS b FROM ta JOIN tabc USING (b) ORDER BY ALL;
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SELECT b + 2 AS a FROM tb JOIN tabc USING (a) ORDER BY ALL;
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SELECT a + 2 AS c FROM ta JOIN tabc USING (c) ORDER BY ALL;
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SELECT b AS a, a FROM tb JOIN tabc USING (a) ORDER BY ALL;
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SELECT 1 AS b FROM tb JOIN ta USING (b); -- { serverError UNKNOWN_IDENTIFIER }
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-- SELECT * returns all columns from both tables in new analyzer
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SELECT 3 AS a, a, * FROM tb FULL JOIN tabc USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM tb JOIN tabc USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM tb JOIN tabc USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM tb LEFT JOIN tabc USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM tb RIGHT JOIN tabc USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM tb FULL JOIN tabc USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM tb FULL JOIN tabc USING (a) ORDER BY ALL SETTINGS asterisk_include_alias_columns = 1, allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM (SELECT b FROM tb) t1 JOIN (SELECT a, b FROM tabc) t2 USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM (SELECT b FROM tb) t1 LEFT JOIN (SELECT a, b FROM tabc) t2 USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM (SELECT b FROM tb) t1 RIGHT JOIN (SELECT a, b FROM tabc) t2 USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, * FROM (SELECT b FROM tb) t1 FULL JOIN (SELECT a, b FROM tabc) t2 USING (a) ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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SELECT b + 1 AS a, s FROM tb FULL OUTER JOIN tabc USING (a) PREWHERE a > 2 ORDER BY ALL SETTINGS allow_experimental_analyzer = 1;
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-- It's a default behavior for old analyzer and new with analyzer_compatibility_join_using_top_level_identifier
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-- Column `b` actually exists in left table, but `b` from USING is resoled to `a + 2` and `a` is not in left table
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-- so we get UNKNOWN_IDENTIFIER error.
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SELECT a + 2 AS b FROM tb JOIN tabc USING (b) ORDER BY ALL
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SETTINGS analyzer_compatibility_join_using_top_level_identifier = 1; -- { serverError UNKNOWN_IDENTIFIER }
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-- In new analyzer with `analyzer_compatibility_join_using_top_level_identifier = 0` we get `b` from left table
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SELECT a + 2 AS b FROM tb JOIN tabc USING (b) ORDER BY ALL
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SETTINGS analyzer_compatibility_join_using_top_level_identifier = 0, allow_experimental_analyzer = 1;
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-- This is example where query may return different results with different `analyzer_compatibility_join_using_top_level_identifier`
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DROP TABLE IF EXISTS users;
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CREATE TABLE users (uid Int16, name String, spouse_name String) ENGINE=Memory;
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INSERT INTO users VALUES (1231, 'John', 'Ksenia');
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INSERT INTO users VALUES (6666, 'Ksenia', '');
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SELECT u1.uid, u1.spouse_name as name, u2.uid, u2.name
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FROM users u1 JOIN users u2 USING (name)
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ORDER BY u1.uid
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FORMAT TSVWithNamesAndTypes
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SETTINGS allow_experimental_analyzer = 1, analyzer_compatibility_join_using_top_level_identifier = 1;
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SELECT u1.uid, u1.spouse_name as name, u2.uid, u2.name
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FROM users u1 JOIN users u2 USING (name)
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ORDER BY u1.uid
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FORMAT TSVWithNamesAndTypes
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SETTINGS allow_experimental_analyzer = 1, analyzer_compatibility_join_using_top_level_identifier = 0;
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SELECT u1.uid, u1.spouse_name as name, u2.uid, u2.name
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FROM users u1 JOIN users u2 USING (name)
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ORDER BY u1.uid
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FORMAT TSVWithNamesAndTypes
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SETTINGS allow_experimental_analyzer = 0;
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DROP TABLE IF EXISTS users;
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DROP TABLE IF EXISTS tabc;
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DROP TABLE IF EXISTS ta;
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DROP TABLE IF EXISTS tb;
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DROP TABLE IF EXISTS tc;
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