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14 lines
405 B
C++
14 lines
405 B
C++
#include <Columns/ColumnNullable.h>
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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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* null_map_holder could take ownership of null_map, if required.
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*/
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void extractNestedColumnsAndNullMap(ConstColumnPlainPtrs & key_columns, ColumnPtr & null_map_holder, ConstNullMapPtr & null_map);
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}
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