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30 lines
943 B
C++
30 lines
943 B
C++
#pragma once
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#include <Core/Block.h>
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#include <Core/NamesAndTypes.h>
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namespace DB
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{
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namespace Nested
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{
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std::string concatenateName(const std::string & nested_table_name, const std::string & nested_field_name);
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std::pair<std::string, std::string> splitName(const std::string & name);
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/// Returns the prefix of the name to the first '.'. Or the name is unchanged if there is no dot.
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std::string extractTableName(const std::string & nested_name);
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/// Replace Array(Tuple(...)) columns to a multiple of Array columns in a form of `column_name.element_name`.
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Block flatten(const Block & block);
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/// Collect Array columns in a form of `column_name.element_name` to single Array(Tuple(...)) column.
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NamesAndTypesList collect(const NamesAndTypesList & names_and_types);
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/// Check that sizes of arrays - elements of nested data structures - are equal.
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void validateArraySizes(const Block & block);
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}
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}
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