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74 lines
2.0 KiB
C++
74 lines
2.0 KiB
C++
/*-------------------------------------------------------------------------
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*
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* pgconnection.h
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*
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*
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* DESCRIPTION
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* Postgres Connection Class:
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* Manage Postgres backend connection
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*
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* NOTES
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* Currently under construction.
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*
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* Portions Copyright (c) 1996-2000, PostgreSQL, Inc
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* $Id: pgconnection.h,v 1.4 2000/03/02 02:00:58 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PGCONN_H
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#define PGCONN_H
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#include <stdio.h>
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#include <string>
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extern "C" {
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#include "libpq-fe.h"
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}
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using namespace std;
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// ****************************************************************
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//
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// PgConnection - a connection made to a postgres backend
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//
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// ****************************************************************
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// This class contains all the information about the connection
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// to the backend process. All the database classes should be
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// derived from this class to obtain the connection interface.
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class PgConnection {
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protected:
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PGconn* pgConn; // Connection Structures
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PGresult* pgResult; // Query Result
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int pgCloseConnection; // Flag indicating whether the connection should be closed or not
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public:
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PgConnection(const char* conninfo); // use reasonable & environment defaults
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~PgConnection(); // close connection and clean up
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// Connection status and error messages
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ConnStatusType Status();
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int ConnectionBad();
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const char* ErrorMessage();
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// returns the database name of the connection
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const char* DBName();
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// Query Execution interface
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ExecStatusType Exec(const char* query); // send a query to the backend
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int ExecCommandOk(const char* query); // send a command and check if it's OK
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int ExecTuplesOk(const char* query); // send a command and check if tuples are returned
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PGnotify* Notifies();
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protected:
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ConnStatusType Connect(const char* conninfo);
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string IntToString(int);
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protected:
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PgConnection();
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};
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#endif // PGCONN_H
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