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104 lines
3.1 KiB
C++
104 lines
3.1 KiB
C++
#pragma once
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#include <Parsers/IAST.h>
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#include <Parsers/ASTQueryWithOutput.h>
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#include <Parsers/ASTQueryWithOnCluster.h>
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#include <Common/quoteString.h>
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#include <IO/Operators.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 ASTQueryWithOutput, 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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bool exchange{false}; /// For EXCHANGE TABLES
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bool database{false}; /// For RENAME DATABASE
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bool dictionary{false}; /// For RENAME DICTIONARY
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/** Get the text that identifies this element. */
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String getID(char) const override { return "Rename"; }
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ASTPtr clone() const override
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{
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auto res = std::make_shared<ASTRenameQuery>(*this);
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cloneOutputOptions(*res);
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return res;
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}
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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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auto & query = query_ptr->as<ASTRenameQuery &>();
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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 formatQueryImpl(const FormatSettings & settings, FormatState &, FormatStateStacked) const override
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{
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if (database)
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{
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settings.ostr << (settings.hilite ? hilite_keyword : "") << "RENAME DATABASE " << (settings.hilite ? hilite_none : "");
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settings.ostr << backQuoteIfNeed(elements.at(0).from.database);
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settings.ostr << (settings.hilite ? hilite_keyword : "") << " TO " << (settings.hilite ? hilite_none : "");
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settings.ostr << backQuoteIfNeed(elements.at(0).to.database);
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formatOnCluster(settings);
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return;
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}
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settings.ostr << (settings.hilite ? hilite_keyword : "");
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if (exchange && dictionary)
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settings.ostr << "EXCHANGE DICTIONARIES ";
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else if (exchange)
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settings.ostr << "EXCHANGE TABLES ";
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else if (dictionary)
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settings.ostr << "RENAME DICTIONARY ";
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else
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settings.ostr << "RENAME TABLE ";
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settings.ostr << (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 : "") << (exchange ? " AND " : " 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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