ClickHouse/src/Interpreters/OptimizeIfWithConstantConditionVisitor.h
2020-04-03 18:14:31 +03:00

24 lines
397 B
C++

#pragma once
#include <Interpreters/Aliases.h>
namespace DB
{
/// It removes Function_if node from AST if condition is constant.
/// TODO: rewrite with InDepthNodeVisitor
class OptimizeIfWithConstantConditionVisitor
{
public:
OptimizeIfWithConstantConditionVisitor(Aliases & aliases_)
: aliases(aliases_)
{}
void visit(ASTPtr & ast);
private:
Aliases & aliases;
};
}