ClickHouse/dbms/src/Interpreters/ArrayJoinAction.h
Artem Zuikov 8c23840cc8
ExpressionActions refactoring: extract ArrayJoinAction class (#8998)
refactoring: extract ArrayJoinAction class
2020-02-05 13:12:19 +03:00

36 lines
892 B
C++

#pragma once
#include <Core/Names.h>
#include <Core/Block.h>
namespace DB
{
class Context;
class IFunctionOverloadResolver;
using FunctionOverloadResolverPtr = std::shared_ptr<IFunctionOverloadResolver>;
struct ArrayJoinAction
{
NameSet columns;
bool is_left = false;
bool is_unaligned = false;
/// For unaligned [LEFT] ARRAY JOIN
FunctionOverloadResolverPtr function_length;
FunctionOverloadResolverPtr function_greatest;
FunctionOverloadResolverPtr function_arrayResize;
/// For LEFT ARRAY JOIN.
FunctionOverloadResolverPtr function_builder;
ArrayJoinAction(const NameSet & array_joined_columns_, bool array_join_is_left, const Context & context);
void prepare(Block & sample_block);
void execute(Block & block, bool dry_run);
void finalize(NameSet & needed_columns, NameSet & unmodified_columns, NameSet & final_columns);
};
}