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75 lines
2.0 KiB
C++
75 lines
2.0 KiB
C++
#pragma once
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#include <Parsers/IAST.h>
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#include <Parsers/ASTQueryWithOnCluster.h>
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namespace DB
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{
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/** RENAME query
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*/
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class ASTRenameQuery : public IAST, public ASTQueryWithOnCluster
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{
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public:
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struct Table
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{
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String database;
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String table;
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};
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struct Element
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{
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Table from;
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Table to;
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};
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using Elements = std::vector<Element>;
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Elements elements;
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ASTRenameQuery() = default;
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ASTRenameQuery(const StringRange range_) : IAST(range_) {}
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/** Get the text that identifies this element. */
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String getID() const override { return "Rename"; };
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ASTPtr clone() const override { return std::make_shared<ASTRenameQuery>(*this); }
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ASTPtr getRewrittenASTWithoutOnCluster(const std::string & new_database = {}) const override
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{
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auto query_ptr = clone();
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ASTRenameQuery & query = static_cast<ASTRenameQuery &>(*query_ptr);
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query.cluster.clear();
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for (Element & elem : query.elements)
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{
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if (elem.from.database.empty())
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elem.from.database = new_database;
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if (elem.to.database.empty())
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elem.to.database = new_database;
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}
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return query_ptr;
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}
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protected:
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void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
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{
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settings.ostr << (settings.hilite ? hilite_keyword : "") << "RENAME TABLE " << (settings.hilite ? hilite_none : "");
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for (auto it = elements.cbegin(); it != elements.cend(); ++it)
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{
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if (it != elements.cbegin())
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settings.ostr << ", ";
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settings.ostr << (!it->from.database.empty() ? backQuoteIfNeed(it->from.database) + "." : "") << backQuoteIfNeed(it->from.table)
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<< (settings.hilite ? hilite_keyword : "") << " TO " << (settings.hilite ? hilite_none : "")
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<< (!it->to.database.empty() ? backQuoteIfNeed(it->to.database) + "." : "") << backQuoteIfNeed(it->to.table);
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}
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formatOnCluster(settings);
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}
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};
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}
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