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35 lines
965 B
C++
35 lines
965 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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/// Create actions which adds missing defaults to block according to required_columns using columns description
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/// or substitute NULL into DEFAULT value in case of INSERT SELECT query (null_as_default) if according setting is 1.
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/// Return nullptr if no actions required.
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ActionsDAGPtr evaluateMissingDefaults(
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const Block & header,
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const NamesAndTypesList & required_columns,
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const ColumnsDescription & columns,
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ContextPtr context,
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bool save_unneeded_columns = true,
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bool null_as_default = false);
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/// Tries to convert columns in block to required_columns
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void performRequiredConversions(Block & block, const NamesAndTypesList & required_columns, ContextPtr context);
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}
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