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diff --git a/reladminif/externs.h b/reladminif/externs.h
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+/*
+* This file is part of rasdaman community.
+*
+* Rasdaman community is free software: you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation, either version 3 of the License, or
+* (at your option) any later version.
+*
+* Rasdaman community 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 General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
+*
+* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
+rasdaman GmbH.
+*
+* For more information please see <http://www.rasdaman.org>
+* or contact Peter Baumann via <baumann@rasdaman.com>.
+*/
+/*****************************************************************************
+ *
+ *
+ * PURPOSE:
+ * provide global definitions for embedded SQL usage (any base DBMS)
+ *
+ *
+ * COMMENTS:
+ * - uses embedded SQL
+ * - FIXME: should also contain stuff from sqlglobals.h, merge some time
+ *
+ *****************************************************************************/
+
+#ifndef _EXTERNS_H_
+#define _EXTERNS_H_
+
+const int  SQLOK = 0;
+const short  INDNULL = -1;
+
+#ifdef BASEDB_INFORMIX
+	const int  SQLNULLFETCHED = -245;
+	const int  SQLTABLEUNKNOWN = -206;
+	const int  SQLNODATAFOUND = 100;
+
+	//SQLCODE and SQLSTATE are defined in the sqlca.h file
+#endif // informix
+
+#ifdef BASEDB_DB2
+	const int  SQLNULLFETCHED = -1405;
+	const int  SQLTABLEUNKNOWN = -942;
+	const int  SQLNODATAFOUND = 100;
+
+	//declared in sqlerror.sqC
+	extern long SQLCODE;
+	extern char SQLSTATE[6];
+
+#endif // db2
+
+#ifdef BASEDB_ORACLE
+	const int  SQLNULLFETCHED = -1405;
+	const int  SQLTABLEUNKNOWN = -942;
+	const int  SQLNODATAFOUND = 100;
+
+	#include <sqlca.h>
+	#define SQLCODE sqlca.sqlcode
+
+	//declared in sqlerror.pc
+	extern struct sqlca sqlca;
+#endif // oracle
+
+#ifdef BASEDB_PGSQL
+	#include "ecpgerrno.h"		// PgSQL error codes
+	// const int  SQLNULLFETCHED = -1405;	unused
+	// const int  SQLTABLEUNKNOWN = -942;	not supported by PG
+	const int  SQLNODATAFOUND = ECPG_NOT_FOUND;
+	//SQLCODE and SQLSTATE are defined in the sqlca.h file
+#endif // pgsql
+
+#endif // _EXTERNS_H_