#pragma once

#include <Interpreters/IInterpreter.h>


namespace DB
{

class Context;

class InterpreterCreateFunctionQuery : public IInterpreter, WithContext
{
public:
    InterpreterCreateFunctionQuery(const ASTPtr & query_ptr_, ContextPtr context_, bool is_internal_)
        : WithContext(context_)
        , query_ptr(query_ptr_)
        , is_internal(is_internal_) {}

    BlockIO execute() override;

    void setInternal(bool internal_);

private:
    static void validateFunction(ASTPtr function, const String & name);
    static std::unordered_set<String> getIdentifiers(ASTPtr node);
    static void validateFunctionRecursiveness(ASTPtr node, const String & function_to_create);

    ASTPtr query_ptr;
    bool is_internal;
};

}