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#pragma once
#include <Parsers/ASTQueryWithTableAndOutput.h>
#include <Parsers/ASTQueryWithOnCluster.h>
namespace DB
{
/** DROP query
*/
class ASTDropQuery : public ASTQueryWithTableAndOutput, public ASTQueryWithOnCluster
{
public:
enum Kind
{
Drop,
Detach,
Truncate,
};
Kind kind;
bool if_exists{false};
/// Useful if we already have a DDL lock
bool no_ddl_lock{false};
/// We dropping dictionary, so print correct word
bool is_dictionary{false};
/// Same as above
bool is_view{false};
bool sync{false};
// We detach the object permanently, so it will not be reattached back during server restart.
bool permanently{false};
/** Get the text that identifies this element. */
String getID(char) const override;
ASTPtr clone() const override;
ASTPtr getRewrittenASTWithoutOnCluster(const WithoutOnClusterASTRewriteParams & params) const override
{
return removeOnCluster<ASTDropQuery>(clone(), params.default_database);
}
QueryKind getQueryKind() const override { return QueryKind::Drop; }
protected:
void formatQueryImpl(const FormatSettings & settings, FormatState &, FormatStateStacked) const override;
};
}
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