mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-12 17:32:32 +00:00
116 lines
3.8 KiB
C++
116 lines
3.8 KiB
C++
#pragma once
|
|
|
|
#include <Parsers/IAST.h>
|
|
#include <Parsers/ASTQueryWithOutput.h>
|
|
#include <Parsers/ASTQueryWithOnCluster.h>
|
|
#include <Common/quoteString.h>
|
|
#include <IO/Operators.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
/** RENAME query
|
|
*/
|
|
class ASTRenameQuery : public ASTQueryWithOutput, public ASTQueryWithOnCluster
|
|
{
|
|
public:
|
|
struct Table
|
|
{
|
|
String database;
|
|
String table;
|
|
};
|
|
|
|
struct Element
|
|
{
|
|
Table from;
|
|
Table to;
|
|
bool if_exists{false}; /// If this directive is used, one will not get an error if the table/database/dictionary to be renamed/exchanged doesn't exist.
|
|
};
|
|
|
|
using Elements = std::vector<Element>;
|
|
Elements elements;
|
|
|
|
bool exchange{false}; /// For EXCHANGE TABLES
|
|
bool database{false}; /// For RENAME DATABASE
|
|
bool dictionary{false}; /// For RENAME DICTIONARY
|
|
|
|
/// Special flag for CREATE OR REPLACE. Do not throw if the second table does not exist.
|
|
bool rename_if_cannot_exchange{false};
|
|
|
|
/** Get the text that identifies this element. */
|
|
String getID(char) const override { return "Rename"; }
|
|
|
|
ASTPtr clone() const override
|
|
{
|
|
auto res = std::make_shared<ASTRenameQuery>(*this);
|
|
cloneOutputOptions(*res);
|
|
return res;
|
|
}
|
|
|
|
ASTPtr getRewrittenASTWithoutOnCluster(const WithoutOnClusterASTRewriteParams & params) const override
|
|
{
|
|
auto query_ptr = clone();
|
|
auto & query = query_ptr->as<ASTRenameQuery &>();
|
|
|
|
query.cluster.clear();
|
|
for (Element & elem : query.elements)
|
|
{
|
|
if (elem.from.database.empty())
|
|
elem.from.database = params.default_database;
|
|
if (elem.to.database.empty())
|
|
elem.to.database = params.default_database;
|
|
}
|
|
|
|
return query_ptr;
|
|
}
|
|
|
|
QueryKind getQueryKind() const override { return QueryKind::Rename; }
|
|
|
|
protected:
|
|
void formatQueryImpl(const FormatSettings & settings, FormatState &, FormatStateStacked) const override
|
|
{
|
|
if (database)
|
|
{
|
|
settings.ostr << (settings.hilite ? hilite_keyword : "") << "RENAME DATABASE " << (settings.hilite ? hilite_none : "");
|
|
|
|
if (elements.at(0).if_exists)
|
|
settings.ostr << (settings.hilite ? hilite_keyword : "") << "IF EXISTS " << (settings.hilite ? hilite_none : "");
|
|
|
|
settings.ostr << backQuoteIfNeed(elements.at(0).from.database);
|
|
settings.ostr << (settings.hilite ? hilite_keyword : "") << " TO " << (settings.hilite ? hilite_none : "");
|
|
settings.ostr << backQuoteIfNeed(elements.at(0).to.database);
|
|
formatOnCluster(settings);
|
|
return;
|
|
}
|
|
|
|
settings.ostr << (settings.hilite ? hilite_keyword : "");
|
|
if (exchange && dictionary)
|
|
settings.ostr << "EXCHANGE DICTIONARIES ";
|
|
else if (exchange)
|
|
settings.ostr << "EXCHANGE TABLES ";
|
|
else if (dictionary)
|
|
settings.ostr << "RENAME DICTIONARY ";
|
|
else
|
|
settings.ostr << "RENAME TABLE ";
|
|
|
|
settings.ostr << (settings.hilite ? hilite_none : "");
|
|
|
|
for (auto it = elements.cbegin(); it != elements.cend(); ++it)
|
|
{
|
|
if (it != elements.cbegin())
|
|
settings.ostr << ", ";
|
|
|
|
if (it->if_exists)
|
|
settings.ostr << (settings.hilite ? hilite_keyword : "") << "IF EXISTS " << (settings.hilite ? hilite_none : "");
|
|
settings.ostr << (!it->from.database.empty() ? backQuoteIfNeed(it->from.database) + "." : "") << backQuoteIfNeed(it->from.table)
|
|
<< (settings.hilite ? hilite_keyword : "") << (exchange ? " AND " : " TO ") << (settings.hilite ? hilite_none : "")
|
|
<< (!it->to.database.empty() ? backQuoteIfNeed(it->to.database) + "." : "") << backQuoteIfNeed(it->to.table);
|
|
}
|
|
|
|
formatOnCluster(settings);
|
|
}
|
|
};
|
|
|
|
}
|