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34 lines
901 B
C++
34 lines
901 B
C++
#pragma once
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#include <DataStreams/ITTLAlgorithm.h>
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namespace DB
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{
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/// Deletes (replaces to default) values in column according to column's TTL description.
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/// If all values in column are replaced with defaults, this column won't be written to part.
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class TTLColumnAlgorithm final : public ITTLAlgorithm
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{
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public:
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TTLColumnAlgorithm(
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const TTLDescription & description_,
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const TTLInfo & old_ttl_info_,
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time_t current_time_,
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bool force_,
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const String & column_name_,
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const ExpressionActionsPtr & default_expression_,
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const String & default_column_name_);
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void execute(Block & block) override;
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void finalize(const MutableDataPartPtr & data_part) const override;
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private:
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const String column_name;
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const ExpressionActionsPtr default_expression;
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const String default_column_name;
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bool is_fully_empty = true;
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};
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}
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