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58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
#pragma once
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#include <Parsers/IAST.h>
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namespace DB
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{
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/** Query with output options
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* (supporting [INTO OUTFILE 'file_name'] [FORMAT format_name] [SETTINGS key1 = value1, key2 = value2, ...] suffix).
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*/
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class ASTQueryWithOutput : public IAST
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{
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public:
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ASTPtr out_file;
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ASTPtr format;
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ASTPtr settings_ast;
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void formatImpl(const FormatSettings & s, FormatState & state, FormatStateStacked frame) const final;
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/// Remove 'FORMAT <fmt> and INTO OUTFILE <file>' if exists
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static bool resetOutputASTIfExist(IAST & ast);
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protected:
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/// NOTE: call this helper at the end of the clone() method of descendant class.
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void cloneOutputOptions(ASTQueryWithOutput & cloned) const;
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/// Format only the query part of the AST (without output options).
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virtual void formatQueryImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const = 0;
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};
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/** Helper template for simple queries like SHOW PROCESSLIST.
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*/
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template <typename ASTIDAndQueryNames>
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class ASTQueryWithOutputImpl : public ASTQueryWithOutput
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{
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public:
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String getID(char) const override { return ASTIDAndQueryNames::ID; }
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ASTPtr clone() const override
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{
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auto res = std::make_shared<ASTQueryWithOutputImpl<ASTIDAndQueryNames>>(*this);
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res->children.clear();
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cloneOutputOptions(*res);
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return res;
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}
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protected:
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void formatQueryImpl(const FormatSettings & settings, FormatState &, FormatStateStacked) const override
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{
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settings.ostr << (settings.hilite ? hilite_keyword : "")
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<< ASTIDAndQueryNames::Query << (settings.hilite ? hilite_none : "");
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}
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};
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}
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