mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-05 15:21:43 +00:00
113 lines
2.9 KiB
C++
113 lines
2.9 KiB
C++
#pragma once
|
||
|
||
#include <DB/Storages/IStorage.h>
|
||
#include <DB/Storages/AlterCommands.h>
|
||
#include <DB/Interpreters/Context.h>
|
||
#include <DB/Interpreters/IInterpreter.h>
|
||
|
||
namespace DB
|
||
{
|
||
|
||
|
||
|
||
/** Позволяет добавить или удалить столбец в таблице.
|
||
* Также позволяет осуществить манипуляции с партициями таблиц семейства MergeTree.
|
||
*/
|
||
class InterpreterAlterQuery : public IInterpreter
|
||
{
|
||
public:
|
||
InterpreterAlterQuery(ASTPtr query_ptr_, const Context & context_);
|
||
|
||
BlockIO execute() override;
|
||
|
||
private:
|
||
struct PartitionCommand
|
||
{
|
||
enum Type
|
||
{
|
||
DROP_PARTITION,
|
||
ATTACH_PARTITION,
|
||
FETCH_PARTITION,
|
||
FREEZE_PARTITION,
|
||
RESHARD_PARTITION
|
||
};
|
||
|
||
Type type;
|
||
|
||
Field partition;
|
||
bool detach = false; /// true для DETACH PARTITION.
|
||
|
||
bool unreplicated = false;
|
||
bool part = false;
|
||
|
||
String from; /// Для FETCH PARTITION - путь в ZK к шарду, с которого скачивать партицию.
|
||
|
||
/// Для RESHARD PARTITION.
|
||
Field last_partition;
|
||
WeightedZooKeeperPaths weighted_zookeeper_paths;
|
||
ASTPtr sharding_key_expr;
|
||
bool do_copy = false;
|
||
Field coordinator;
|
||
|
||
/// For FREEZE PARTITION
|
||
String with_name;
|
||
|
||
static PartitionCommand dropPartition(const Field & partition, bool detach, bool unreplicated)
|
||
{
|
||
PartitionCommand res;
|
||
res.type = DROP_PARTITION;
|
||
res.partition = partition;
|
||
res.detach = detach;
|
||
res.unreplicated = unreplicated;
|
||
return res;
|
||
}
|
||
|
||
static PartitionCommand attachPartition(const Field & partition, bool unreplicated, bool part)
|
||
{
|
||
PartitionCommand res;
|
||
res.type = ATTACH_PARTITION;
|
||
res.partition = partition;
|
||
res.unreplicated = unreplicated;
|
||
res.part = part;
|
||
return res;
|
||
}
|
||
|
||
static PartitionCommand fetchPartition(const Field & partition, const String & from)
|
||
{
|
||
PartitionCommand res;
|
||
res.type = FETCH_PARTITION;
|
||
res.partition = partition;
|
||
res.from = from;
|
||
return res;
|
||
}
|
||
|
||
static PartitionCommand freezePartition(const Field & partition, const String & with_name)
|
||
{
|
||
PartitionCommand res;
|
||
res.type = FREEZE_PARTITION;
|
||
res.partition = partition;
|
||
res.with_name = with_name;
|
||
return res;
|
||
}
|
||
|
||
static PartitionCommand reshardPartitions(const Field & first_partition_, const Field & last_partition_,
|
||
const WeightedZooKeeperPaths & weighted_zookeeper_paths_, const ASTPtr & sharding_key_expr_,
|
||
bool do_copy_, const Field & coordinator_)
|
||
{
|
||
return {RESHARD_PARTITION, first_partition_, false, false, false, {},
|
||
last_partition_, weighted_zookeeper_paths_, sharding_key_expr_, do_copy_, coordinator_};
|
||
}
|
||
};
|
||
|
||
using PartitionCommands = std::vector<PartitionCommand>;
|
||
|
||
ASTPtr query_ptr;
|
||
|
||
Context context;
|
||
|
||
static void parseAlter(const ASTAlterQuery::ParameterContainer & params,
|
||
AlterCommands & out_alter_commands, PartitionCommands & out_partition_commands);
|
||
};
|
||
|
||
}
|