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11 lines
350 B
SQL
11 lines
350 B
SQL
DROP TABLE IF EXISTS columns;
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CREATE TABLE columns (a UInt8, b UInt8, c UInt8) ENGINE = Memory;
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INSERT INTO columns VALUES (1, 2, 3);
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SET max_columns_to_read = 1;
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SELECT a FROM (SELECT * FROM columns);
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SELECT a FROM (SELECT * FROM (SELECT * FROM columns));
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SELECT a FROM (SELECT * FROM columns UNION ALL SELECT * FROM columns);
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DROP TABLE columns;
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