ClickHouse/dbms/include/DB/Parsers/ASTShowTablesQuery.h

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#pragma once
#include <mysqlxx/Manip.h>
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#include <DB/Parsers/IAST.h>
#include <DB/Parsers/ASTQueryWithOutput.h>
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namespace DB
{
/** Запрос SHOW TABLES или SHOW DATABASES
*/
class ASTShowTablesQuery : public ASTQueryWithOutput
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{
public:
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bool databases{false};
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String from;
String like;
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bool not_like{false};
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ASTShowTablesQuery() = default;
ASTShowTablesQuery(const StringRange range_) : ASTQueryWithOutput(range_) {}
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/** Получить текст, который идентифицирует этот элемент. */
String getID() const override { return "ShowTables"; };
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ASTPtr clone() const override
{
ASTShowTablesQuery * res = new ASTShowTablesQuery(*this);
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ASTPtr ptr{res};
res->children.clear();
if (format)
{
res->format = format->clone();
res->children.push_back(res->format);
}
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return ptr;
}
protected:
void formatImpl(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const override
{
if (databases)
{
settings.ostr << (settings.hilite ? hilite_keyword : "") << "SHOW DATABASES" << (settings.hilite ? hilite_none : "");
}
else
{
settings.ostr << (settings.hilite ? hilite_keyword : "") << "SHOW TABLES" << (settings.hilite ? hilite_none : "");
if (!from.empty())
settings.ostr << (settings.hilite ? hilite_keyword : "") << " FROM " << (settings.hilite ? hilite_none : "")
<< backQuoteIfNeed(from);
if (!like.empty())
settings.ostr << (settings.hilite ? hilite_keyword : "") << " LIKE " << (settings.hilite ? hilite_none : "")
<< mysqlxx::quote << like;
}
if (format)
{
std::string indent_str = settings.one_line ? "" : std::string(4 * frame.indent, ' ');
settings.ostr << (settings.hilite ? hilite_keyword : "") << settings.nl_or_ws << indent_str << "FORMAT " << (settings.hilite ? hilite_none : "");
format->formatImpl(settings, state, frame);
}
}
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};
}