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31 lines
992 B
C++
31 lines
992 B
C++
#pragma once
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#include <Interpreters/Context_fwd.h>
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#include <memory>
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#include <string>
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#include <unordered_map>
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namespace DB
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{
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class Block;
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class NamesAndTypesList;
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class ColumnsDescription;
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class ActionsDAG;
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using ActionsDAGPtr = std::shared_ptr<ActionsDAG>;
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/** Adds three types of columns into block
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* 1. Columns, that are missed inside request, but present in table without defaults (missed columns)
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* 2. Columns, that are missed inside request, but present in table with defaults (columns with default values)
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* 3. Columns that materialized from other columns (materialized columns)
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* Also can substitute NULL with DEFAULT value in case of INSERT SELECT query (null_as_default) if according setting is 1.
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* All three types of columns are materialized (not constants).
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*/
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ActionsDAGPtr addMissingDefaults(
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const Block & header, const NamesAndTypesList & required_columns,
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const ColumnsDescription & columns, ContextPtr context, bool null_as_default = false);
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}
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