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ed5b521110
* Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2].
87 lines
2.7 KiB
C++
87 lines
2.7 KiB
C++
#include <Poco/Data/SessionPool.h>
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#include <Poco/Util/AbstractConfiguration.h>
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#include <DB/Dictionaries/ODBCDictionarySource.h>
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#include <DB/Dictionaries/ODBCBlockInputStream.h>
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#include <common/logger_useful.h>
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namespace DB
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{
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static const size_t max_block_size = 8192;
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ODBCDictionarySource::ODBCDictionarySource(const DictionaryStructure & dict_struct_,
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const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix,
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const Block & sample_block)
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: log(&Logger::get("ODBCDictionarySource")),
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dict_struct{dict_struct_},
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db{config.getString(config_prefix + ".db", "")},
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table{config.getString(config_prefix + ".table")},
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where{config.getString(config_prefix + ".where", "")},
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sample_block{sample_block},
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pool{std::make_shared<Poco::Data::SessionPool>(
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config.getString(config_prefix + ".connector", "ODBC"),
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config.getString(config_prefix + ".connection_string"))},
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query_builder{dict_struct, db, table, where, ExternalQueryBuilder::None}, /// NOTE Better to obtain quoting style via ODBC interface.
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load_all_query{query_builder.composeLoadAllQuery()}
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{
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}
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/// copy-constructor is provided in order to support cloneability
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ODBCDictionarySource::ODBCDictionarySource(const ODBCDictionarySource & other)
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: log(&Logger::get("ODBCDictionarySource")),
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dict_struct{other.dict_struct},
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db{other.db},
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table{other.table},
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where{other.where},
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sample_block{other.sample_block},
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pool{other.pool},
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query_builder{dict_struct, db, table, where, ExternalQueryBuilder::None},
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load_all_query{other.load_all_query}
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{
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}
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BlockInputStreamPtr ODBCDictionarySource::loadAll()
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{
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LOG_TRACE(log, load_all_query);
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return std::make_shared<ODBCBlockInputStream>(pool->get(), load_all_query, sample_block, max_block_size);
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}
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BlockInputStreamPtr ODBCDictionarySource::loadIds(const std::vector<UInt64> & ids)
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{
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const auto query = query_builder.composeLoadIdsQuery(ids);
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return std::make_shared<ODBCBlockInputStream>(pool->get(), query, sample_block, max_block_size);
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}
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BlockInputStreamPtr ODBCDictionarySource::loadKeys(
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const ConstColumnPlainPtrs & key_columns, const std::vector<std::size_t> & requested_rows)
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{
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const auto query = query_builder.composeLoadKeysQuery(key_columns, requested_rows, ExternalQueryBuilder::AND_OR_CHAIN);
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return std::make_shared<ODBCBlockInputStream>(pool->get(), query, sample_block, max_block_size);
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}
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bool ODBCDictionarySource::isModified() const
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{
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return true;
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}
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bool ODBCDictionarySource::supportsSelectiveLoad() const
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{
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return true;
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}
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DictionarySourcePtr ODBCDictionarySource::clone() const
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{
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return std::make_unique<ODBCDictionarySource>(*this);
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}
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std::string ODBCDictionarySource::toString() const
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{
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return "ODBC: " + db + '.' + table + (where.empty() ? "" : ", where: " + where);
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}
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}
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