//===----------------------------------------------------------------------===//
//                         DuckDB
//
// duckdb/planner/operator/logical_delim_join.hpp
//
//
//===----------------------------------------------------------------------===//

#pragma once

#include "duckdb/planner/operator/logical_comparison_join.hpp"

namespace duckdb {

//! LogicalDelimJoin represents a special "duplicate eliminated" join. This join type is only used for subquery
//! flattening, and involves performing duplicate elimination on the LEFT side which is then pushed into the RIGHT side.
class LogicalDelimJoin : public LogicalComparisonJoin {
public:
	static constexpr const LogicalOperatorType TYPE = LogicalOperatorType::LOGICAL_DELIM_JOIN;

public:
	explicit LogicalDelimJoin(JoinType type);

	//! The set of columns that will be duplicate eliminated from the LHS and pushed into the RHS
	vector<unique_ptr<Expression>> duplicate_eliminated_columns;

public:
	void Serialize(FieldWriter &writer) const override;
	static unique_ptr<LogicalOperator> Deserialize(LogicalDeserializationState &state, FieldReader &reader);
};

} // namespace duckdb