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22 lines
594 B
MySQL
22 lines
594 B
MySQL
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DROP TABLE IF EXISTS test_new_col;
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CREATE TABLE test_new_col
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(
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`_csv` String,
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`csv_as_array` Array(String) ALIAS splitByChar(';',_csv),
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`csv_col1` String DEFAULT csv_as_array[1],
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`csv_col2` String DEFAULT csv_as_array[2]
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)
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ENGINE = MergeTree
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ORDER BY tuple();
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INSERT INTO test_new_col (_csv) VALUES ('a1;b1;c1;d1'), ('a2;b2;c2;d2'), ('a3;b3;c3;d3');
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SELECT csv_col1, csv_col2 FROM test_new_col ORDER BY csv_col1;
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ALTER TABLE test_new_col ADD COLUMN `csv_col3` String DEFAULT csv_as_array[3];
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SELECT csv_col3 FROM test_new_col ORDER BY csv_col3;
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DROP TABLE IF EXISTS test_new_col;
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