1 | #pragma once |
2 | |
3 | #include <Core/Block.h> |
4 | #include <Core/NamesAndTypes.h> |
5 | |
6 | |
7 | namespace DB |
8 | { |
9 | |
10 | namespace Nested |
11 | { |
12 | std::string concatenateName(const std::string & nested_table_name, const std::string & nested_field_name); |
13 | |
14 | std::pair<std::string, std::string> splitName(const std::string & name); |
15 | |
16 | /// Returns the prefix of the name to the first '.'. Or the name is unchanged if there is no dot. |
17 | std::string (const std::string & nested_name); |
18 | |
19 | /// Replace Array(Tuple(...)) columns to a multiple of Array columns in a form of `column_name.element_name`. |
20 | Block flatten(const Block & block); |
21 | |
22 | /// Collect Array columns in a form of `column_name.element_name` to single Array(Tuple(...)) column. |
23 | NamesAndTypesList collect(const NamesAndTypesList & names_and_types); |
24 | |
25 | /// Check that sizes of arrays - elements of nested data structures - are equal. |
26 | void validateArraySizes(const Block & block); |
27 | } |
28 | |
29 | } |
30 | |