mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-09-30 05:30:51 +00:00
41 lines
1.2 KiB
C++
41 lines
1.2 KiB
C++
#pragma once
|
|
|
|
#include <DB/Interpreters/Cluster.h>
|
|
#include <DB/Parsers/IAST.h>
|
|
#include <DB/Storages/IStorage.h>
|
|
#include <DB/Client/ConnectionPool.h>
|
|
|
|
namespace DB
|
|
{
|
|
|
|
struct Settings;
|
|
class Context;
|
|
class Cluster;
|
|
class Throttler;
|
|
|
|
namespace ClusterProxy
|
|
{
|
|
|
|
/// Base class for the implementation of the details of distributed query
|
|
/// execution that are specific to the query type.
|
|
class IQueryConstructor
|
|
{
|
|
public:
|
|
virtual ~IQueryConstructor() {}
|
|
|
|
/// Create an input stream for local query execution.
|
|
virtual BlockInputStreamPtr createLocal(ASTPtr query_ast, const Context & context, const Cluster::Address & address) = 0;
|
|
/// Create an input stream for remote query execution on one shard.
|
|
virtual BlockInputStreamPtr createRemote(ConnectionPoolPtr & pool, const std::string & query,
|
|
const Settings & settings, ThrottlerPtr throttler, const Context & context) = 0;
|
|
/// Create an input stream for remote query execution on one or more shards.
|
|
virtual BlockInputStreamPtr createRemote(ConnectionPoolsPtr & pools, const std::string & query,
|
|
const Settings & new_settings, ThrottlerPtr throttler, const Context & context) = 0;
|
|
/// Specify how we allocate connections on a shard.
|
|
virtual PoolMode getPoolMode() const = 0;
|
|
};
|
|
|
|
}
|
|
|
|
}
|