ClickHouse/dbms/src/Storages/PartitionCommands.h
2018-06-16 05:16:19 +03:00

61 lines
1.1 KiB
C++

#pragma once
#include <Core/Types.h>
#include <Core/Field.h>
#include <Parsers/IAST.h>
#include <vector>
#include <optional>
namespace DB
{
class IStorage;
class ASTAlterCommand;
struct PartitionCommand
{
enum Type
{
DROP_PARTITION,
ATTACH_PARTITION,
REPLACE_PARTITION,
FETCH_PARTITION,
FREEZE_PARTITION,
CLEAR_COLUMN,
};
Type type;
ASTPtr partition;
Field column_name;
/// true for DETACH PARTITION.
bool detach = false;
/// true for ATTACH PART (and false for PARTITION)
bool part = false;
/// For ATTACH PARTITION partition FROM db.table
String from_database;
String from_table;
bool replace = true;
/// For FETCH PARTITION - path in ZK to the shard, from which to download the partition.
String from_zookeeper_path;
/// For FREEZE PARTITION
String with_name;
static std::optional<PartitionCommand> parse(const ASTAlterCommand * command);
};
class PartitionCommands : public std::vector<PartitionCommand>
{
public:
void validate(const IStorage & table);
};
}