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35 lines
1.3 KiB
SQL
35 lines
1.3 KiB
SQL
DROP TABLE IF EXISTS table_for_rename;
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CREATE TABLE table_for_rename
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(
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date Date,
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key UInt64,
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value1 String,
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value2 String,
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value3 String DEFAULT concat(value1, ' + ', value2)
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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 (date, key, value1, value2) SELECT toDate('2019-10-01') + number % 3, number, toString(number), toString(number + 1) from numbers(9);
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SELECT * FROM table_for_rename ORDER BY key;
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ALTER TABLE table_for_rename RENAME COLUMN value1 TO value4;
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ALTER TABLE table_for_rename RENAME COLUMN value2 TO value5;
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SHOW CREATE TABLE table_for_rename;
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SELECT * FROM table_for_rename ORDER BY key;
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INSERT INTO table_for_rename (date, key, value4, value5) SELECT toDate('2019-10-01') + number % 3, number, toString(number), toString(number + 1) from numbers(10, 10);
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SELECT * FROM table_for_rename ORDER BY key;
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ALTER TABLE table_for_rename RENAME COLUMN value4 TO value1;
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ALTER TABLE table_for_rename RENAME COLUMN value5 TO value2;
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SHOW CREATE TABLE table_for_rename;
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SELECT * FROM table_for_rename ORDER BY key;
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INSERT INTO table_for_rename (date, key, value1, value2) SELECT toDate('2019-10-01') + number % 3, number, toString(number), toString(number + 1) from numbers(20,10);
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SELECT * FROM table_for_rename ORDER BY key;
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DROP TABLE IF EXISTS table_for_rename;
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