ClickHouse/dbms/Storages/PartitionCommands.h

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#pragma once
#include <Core/Field.h>
#include <Core/Types.h>
#include <Parsers/IAST.h>
#include <Storages/IStorage_fwd.h>
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#include <optional>
#include <vector>
namespace DB
{
class ASTAlterCommand;
struct PartitionCommand
{
enum Type
{
ATTACH_PARTITION,
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MOVE_PARTITION,
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DROP_PARTITION,
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DROP_DETACHED_PARTITION,
FETCH_PARTITION,
FREEZE_ALL_PARTITIONS,
FREEZE_PARTITION,
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REPLACE_PARTITION,
};
Type type;
ASTPtr partition;
/// true for DETACH PARTITION.
bool detach = false;
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/// true for ATTACH PART and DROP DETACHED 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 MOVE PARTITION
String to_database;
String to_table;
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/// 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;
enum MoveDestinationType
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{
DISK,
VOLUME,
TABLE,
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};
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std::optional<MoveDestinationType> move_destination_type;
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String move_destination_name;
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static std::optional<PartitionCommand> parse(const ASTAlterCommand * command);
};
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using PartitionCommands = std::vector<PartitionCommand>;
}