#pragma once #include namespace DB { /** Query with output options (supporting [INTO OUTFILE 'file_name'] [FORMAT format_name] suffix). */ class ASTQueryWithOutput : public IAST { public: ASTPtr out_file; ASTPtr format; void formatImpl(const FormatSettings & s, FormatState & state, FormatStateStacked frame) const final; /// Remove 'FORMAT and INTO OUTFILE ' if exists static bool resetOutputASTIfExist(IAST & ast); protected: /// NOTE: call this helper at the end of the clone() method of descendant class. void cloneOutputOptions(ASTQueryWithOutput & cloned) const; /// Format only the query part of the AST (without output options). virtual void formatQueryImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const = 0; }; /** Helper template for simple queries like SHOW PROCESSLIST. */ template class ASTQueryWithOutputImpl : public ASTQueryWithOutput { public: String getID(char) const override { return ASTIDAndQueryNames::ID; } ASTPtr clone() const override { auto res = std::make_shared>(*this); res->children.clear(); cloneOutputOptions(*res); return res; } protected: void formatQueryImpl(const FormatSettings & settings, FormatState &, FormatStateStacked) const override { settings.ostr << (settings.hilite ? hilite_keyword : "") << ASTIDAndQueryNames::Query << (settings.hilite ? hilite_none : ""); } }; }