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49 lines
1.3 KiB
C++
49 lines
1.3 KiB
C++
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#pragma once
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#include <DB/Parsers/IAST.h>
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namespace DB
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{
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/** DROP запрос
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*/
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class ASTDropQuery : public IAST
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{
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public:
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bool detach{false}; /// Запрос DETACH, а не DROP.
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bool if_exists{false};
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String database;
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String table;
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ASTDropQuery() = default;
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ASTDropQuery(const StringRange range_) : IAST(range_) {}
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/** Получить текст, который идентифицирует этот элемент. */
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String getID() const override { return (detach ? "DetachQuery_" : "DropQuery_") + database + "_" + table; };
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ASTPtr clone() const override { return new ASTDropQuery(*this); }
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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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if (table.empty() && !database.empty())
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{
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settings.ostr << (settings.hilite ? hilite_keyword : "")
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<< (detach ? "DETACH DATABASE " : "DROP DATABASE ")
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<< (if_exists ? "IF EXISTS " : "")
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<< (settings.hilite ? hilite_none : "")
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<< backQuoteIfNeed(database);
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return;
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}
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settings.ostr << (settings.hilite ? hilite_keyword : "")
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<< (detach ? "DETACH TABLE " : "DROP TABLE ")
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<< (if_exists ? "IF EXISTS " : "") << (settings.hilite ? hilite_none : "")
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<< (!database.empty() ? backQuoteIfNeed(database) + "." : "") << backQuoteIfNeed(table);
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}
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};
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}
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