mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-12 02:23:14 +00:00
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
#pragma once
|
|
|
|
#include <DB/Dictionaries/IDictionarySource.h>
|
|
#include <DB/Dictionaries/MySQLBlockInputStream.h>
|
|
#include <DB/Dictionaries/ExternalQueryBuilder.h>
|
|
#include <ext/range.hpp>
|
|
#include <mysqlxx/Pool.h>
|
|
#include <Poco/Util/AbstractConfiguration.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
|
|
/// Allows loading dictionaries from a MySQL database
|
|
class MySQLDictionarySource final : public IDictionarySource
|
|
{
|
|
static constexpr auto max_block_size = 8192;
|
|
|
|
public:
|
|
MySQLDictionarySource(const DictionaryStructure & dict_struct_,
|
|
const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix,
|
|
const Block & sample_block);
|
|
|
|
/// copy-constructor is provided in order to support cloneability
|
|
MySQLDictionarySource(const MySQLDictionarySource & other);
|
|
|
|
BlockInputStreamPtr loadAll() override;
|
|
|
|
BlockInputStreamPtr loadIds(const std::vector<std::uint64_t> & ids) override;
|
|
|
|
BlockInputStreamPtr loadKeys(
|
|
const ConstColumnPlainPtrs & key_columns, const std::vector<std::size_t> & requested_rows) override;
|
|
|
|
bool isModified() const override;
|
|
|
|
bool supportsSelectiveLoad() const override;
|
|
|
|
DictionarySourcePtr clone() const override;
|
|
|
|
std::string toString() const override;
|
|
|
|
private:
|
|
Logger * log = &Logger::get("MySQLDictionarySource");
|
|
|
|
static std::string quoteForLike(const std::string s);
|
|
|
|
LocalDateTime getLastModification() const;
|
|
|
|
const DictionaryStructure dict_struct;
|
|
const std::string db;
|
|
const std::string table;
|
|
const std::string where;
|
|
const bool dont_check_update_time;
|
|
Block sample_block;
|
|
mutable mysqlxx::PoolWithFailover pool;
|
|
ExternalQueryBuilder query_builder;
|
|
const std::string load_all_query;
|
|
LocalDateTime last_modification;
|
|
};
|
|
|
|
}
|