mirror of
https://github.com/ClickHouse/ClickHouse.git
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43 lines
1.4 KiB
SQL
43 lines
1.4 KiB
SQL
DROP TABLE IF EXISTS table_for_rename_nested;
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CREATE TABLE table_for_rename_nested
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(
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date Date,
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key UInt64,
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n Nested(x UInt32, y String),
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value1 Array(Array(LowCardinality(String))) -- column with several files
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)
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ENGINE = MergeTree()
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PARTITION BY date
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ORDER BY key;
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INSERT INTO table_for_rename_nested (date, key, n.x, n.y, value1) SELECT toDate('2019-10-01'), number, [number + 1, number + 2, number + 3], ['a', 'b', 'c'], [[toString(number)]] FROM numbers(10);
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SELECT n.x FROM table_for_rename_nested WHERE key = 7;
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SELECT n.y FROM table_for_rename_nested WHERE key = 7;
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SHOW CREATE TABLE table_for_rename_nested;
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ALTER TABLE table_for_rename_nested RENAME COLUMN n.x TO n.renamed_x;
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ALTER TABLE table_for_rename_nested RENAME COLUMN n.y TO n.renamed_y;
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SHOW CREATE TABLE table_for_rename_nested;
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SELECT key, n.renamed_x FROM table_for_rename_nested WHERE key = 7;
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SELECT key, n.renamed_y FROM table_for_rename_nested WHERE key = 7;
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ALTER TABLE table_for_rename_nested RENAME COLUMN n.renamed_x TO not_nested_x; --{serverError 36}
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-- Currently not implemented
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ALTER TABLE table_for_rename_nested RENAME COLUMN n TO renamed_n; --{serverError 48}
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ALTER TABLE table_for_rename_nested RENAME COLUMN value1 TO renamed_value1;
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SELECT renamed_value1 FROM table_for_rename_nested WHERE key = 7;
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SHOW CREATE TABLE table_for_rename_nested;
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SELECT * FROM table_for_rename_nested WHERE key = 7 FORMAT TSVWithNames;
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DROP TABLE IF EXISTS table_for_rename_nested;
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