1 | #include <Columns/ColumnNullable.h> |
---|---|
2 | |
3 | |
4 | namespace DB |
5 | { |
6 | |
7 | /** Replace Nullable key_columns to corresponding nested columns. |
8 | * In 'null_map' return a map of positions where at least one column was NULL. |
9 | * @returns ownership column of null_map. |
10 | */ |
11 | ColumnPtr extractNestedColumnsAndNullMap(ColumnRawPtrs & key_columns, ConstNullMapPtr & null_map); |
12 | |
13 | } |
14 |