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#pragma once
#include <Storages/StorageXDBC.h>
#include <TableFunctions/ITableFunction.h>
#include <Poco/Util/AbstractConfiguration.h>
#include <BridgeHelper/XDBCBridgeHelper.h>
#include "clickhouse_config.h"
namespace DB
{
/**
* Base class for table functions, that works over external bridge
* Xdbc (Xdbc connect string, table) - creates a temporary StorageXDBC.
*/
class ITableFunctionXDBC : public ITableFunction
{
private:
StoragePtr executeImpl(const ASTPtr & ast_function, ContextPtr context, const std::string & table_name, ColumnsDescription cached_columns, bool is_insert_query) const override;
/* A factory method to create bridge helper, that will assist in remote interaction */
virtual BridgeHelperPtr createBridgeHelper(ContextPtr context,
Poco::Timespan http_timeout_,
const std::string & connection_string_,
bool use_connection_pooling_) const = 0;
ColumnsDescription getActualTableStructure(ContextPtr context, bool is_insert_query) const override;
void parseArguments(const ASTPtr & ast_function, ContextPtr context) override;
void startBridgeIfNot(ContextPtr context) const;
String connection_string;
String schema_name;
String remote_table_name;
mutable BridgeHelperPtr helper;
};
class TableFunctionJDBC : public ITableFunctionXDBC
{
public:
static constexpr auto name = "jdbc";
std::string getName() const override
{
return name;
}
private:
BridgeHelperPtr createBridgeHelper(ContextPtr context,
Poco::Timespan http_timeout_,
const std::string & connection_string_,
bool use_connection_pooling_) const override
{
return std::make_shared<XDBCBridgeHelper<JDBCBridgeMixin>>(context, http_timeout_, connection_string_, use_connection_pooling_);
}
const char * getStorageTypeName() const override { return "JDBC"; }
};
class TableFunctionODBC : public ITableFunctionXDBC
{
public:
static constexpr auto name = "odbc";
std::string getName() const override
{
return name;
}
private:
BridgeHelperPtr createBridgeHelper(ContextPtr context,
Poco::Timespan http_timeout_,
const std::string & connection_string_,
bool use_connection_pooling_) const override
{
return std::make_shared<XDBCBridgeHelper<ODBCBridgeMixin>>(context, http_timeout_, connection_string_, use_connection_pooling_);
}
const char * getStorageTypeName() const override { return "ODBC"; }
};
}
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