PostgreSQLInterface.h

/*
 * Copyright (c) 2015 Pavel Vainerman.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, version 2.1.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Lesser Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
//----------------------------------------------------------------------------
#ifndef PostgreSQLInterface_H_
#define PostgreSQLInterface_H_
// ---------------------------------------------------------------------------
#include <string>
#include <string_view>
#include <list>
#include <vector>
#include <queue>
#include <iostream>
#include <pqxx/pqxx>
#include <PassiveTimer.h>
#include <DBInterface.h>
// -------------------------------------------------------------------------
namespace uniset
{
    // ----------------------------------------------------------------------------
    // No thread safety!
    class PostgreSQLInterface:
        public DBNetInterface
    {
        public:
 
            PostgreSQLInterface();
            ~PostgreSQLInterface();
 
            virtual bool nconnect( const std::string& host, const std::string& user,
                                   const std::string& pswd, const std::string& dbname,
                                   unsigned int port = 5432) override;
            virtual bool close() override;
            virtual bool isConnection() const override;
            virtual bool ping() const override;
 
            virtual DBResult query( const std::string& q ) override;
            virtual void cancel_query() override;
            virtual const std::string lastQuery() override;
 
            virtual bool insert( const std::string& q ) override;
            bool insertAndSaveRowid( const std::string& q );
            virtual double insert_id() override;
            void save_inserted_id( const pqxx::result& res );
 
            typedef std::list<std::string> Record;
            typedef std::vector<Record> Data;
 
            // fast insert: Use COPY..from SDTIN..
            bool copy( const std::string& tblname, std::string_view cols, const Data& data );
 
            virtual const std::string error() override;
 
            bool reconnect(const std::string& host, const std::string& user,
                           const std::string& pswd, const std::string& dbname,
                           unsigned int port = 5432);
 
        protected:
 
        private:
 
            DBResult makeResult( const pqxx::result& res );
            std::unique_ptr<pqxx::connection> db;
            std::string lastQ;
            std::string lastE;
            double last_inserted_id;
    };
    // ----------------------------------------------------------------------------------
} // end of namespace uniset
// ----------------------------------------------------------------------------
#endif
// ----------------------------------------------------------------------------------