2020-10-10 18:37:02 +00:00
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#pragma once
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2017-04-01 09:19:00 +00:00
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#include <Columns/ColumnNullable.h>
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2017-03-29 11:33:07 +00:00
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namespace DB
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{
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/** Replace Nullable key_columns to corresponding nested columns.
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* In 'null_map' return a map of positions where at least one column was NULL.
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2019-07-03 19:06:34 +00:00
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* @returns ownership column of null_map.
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2017-03-29 11:33:07 +00:00
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*/
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2020-11-05 18:07:44 +00:00
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ColumnPtr extractNestedColumnsAndNullMap(ColumnRawPtrs & key_columns, ConstNullMapPtr & null_map);
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2017-03-29 11:33:07 +00:00
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}
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