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#pragma once
#include <Processors/Sources/MongoDBSource.h>
#include <Core/Block.h>
#include "DictionaryStructure.h"
#include "IDictionarySource.h"
namespace Poco
{
namespace Util
{
class AbstractConfiguration;
}
namespace MongoDB
{
class Connection;
}
}
namespace DB
{
namespace ErrorCodes
{
extern const int NOT_IMPLEMENTED;
}
/// Allows loading dictionaries from a MongoDB collection
class MongoDBDictionarySource final : public IDictionarySource
{
public:
MongoDBDictionarySource(
const DictionaryStructure & dict_struct_,
const std::string & uri_,
const std::string & host_,
UInt16 port_,
const std::string & user_,
const std::string & password_,
const std::string & method_,
const std::string & db_,
const std::string & collection_,
const std::string & options,
const Block & sample_block_);
MongoDBDictionarySource(const MongoDBDictionarySource & other);
~MongoDBDictionarySource() override;
QueryPipeline loadAll() override;
QueryPipeline loadUpdatedAll() override
{
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Method loadUpdatedAll is unsupported for MongoDBDictionarySource");
}
bool supportsSelectiveLoad() const override { return true; }
QueryPipeline loadIds(const std::vector<UInt64> & ids) override;
QueryPipeline loadKeys(const Columns & key_columns, const std::vector<size_t> & requested_rows) override;
/// @todo: for MongoDB, modification date can somehow be determined from the `_id` object field
bool isModified() const override { return true; }
///Not yet supported
bool hasUpdateField() const override { return false; }
DictionarySourcePtr clone() const override { return std::make_shared<MongoDBDictionarySource>(*this); }
std::string toString() const override;
private:
const DictionaryStructure dict_struct;
const std::string uri;
std::string host;
UInt16 port;
std::string user;
const std::string password;
const std::string method;
std::string db;
const std::string collection;
const std::string options;
Block sample_block;
std::shared_ptr<Poco::MongoDB::Connection> connection;
};
}
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