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40 lines
974 B
SQL
40 lines
974 B
SQL
DROP TABLE IF EXISTS t_vertical_merges;
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CREATE TABLE t_vertical_merges
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(
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a Nullable(String),
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b Int8
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)
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ENGINE = MergeTree
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ORDER BY tuple()
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settings
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vertical_merge_algorithm_min_columns_to_activate=1,
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vertical_merge_algorithm_min_rows_to_activate=1,
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min_bytes_for_wide_part=0;
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INSERT INTO t_vertical_merges SELECT NULL, 1;
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ALTER TABLE t_vertical_merges ADD COLUMN c String;
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OPTIMIZE TABLE t_vertical_merges FINAL;
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SELECT a, b, c FROM t_vertical_merges;
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DROP TABLE IF EXISTS t_vertical_merges;
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CREATE TABLE t_vertical_merges
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(
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a Array(Int16),
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b Int8
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)
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ENGINE = MergeTree
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ORDER BY tuple()
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settings
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vertical_merge_algorithm_min_columns_to_activate=1,
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vertical_merge_algorithm_min_rows_to_activate=1,
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min_bytes_for_wide_part=0;
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INSERT INTO t_vertical_merges SELECT [], 1;
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ALTER TABLE t_vertical_merges CLEAR COLUMN b;
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OPTIMIZE TABLE t_vertical_merges FINAL;
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SELECT a, b FROM t_vertical_merges;
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DROP TABLE IF EXISTS t_vertical_merges;
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