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#pragma once
#include <Processors/IProcessor.h>
#include <Interpreters/SetVariants.h>
#include <Core/ColumnNumbers.h>
#include <Parsers/ASTSelectIntersectExceptQuery.h>
namespace DB
{
class IntersectOrExceptTransform : public IProcessor
{
using Operator = ASTSelectIntersectExceptQuery::Operator;
public:
IntersectOrExceptTransform(const Block & header_, Operator operator_);
String getName() const override { return "IntersectOrExcept"; }
protected:
Status prepare() override;
void work() override;
private:
Operator current_operator;
ColumnNumbers key_columns_pos;
std::optional<SetVariants> data;
Sizes key_sizes;
Chunk current_input_chunk;
Chunk current_output_chunk;
bool finished_second_input = false;
bool has_input = false;
void accumulate(Chunk chunk);
void filter(Chunk & chunk);
template <typename Method>
void addToSet(Method & method, const ColumnRawPtrs & key_columns, size_t rows, SetVariants & variants) const;
template <typename Method>
size_t buildFilter(Method & method, const ColumnRawPtrs & columns,
IColumn::Filter & filter, size_t rows, SetVariants & variants) const;
};
}
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