diff --git a/ifx_connection.ec b/ifx_connection.ec
index 0c89c02..73129eb 100644
--- a/ifx_connection.ec
+++ b/ifx_connection.ec
@@ -84,14 +84,36 @@ void ifxCreateConnectionXact(IfxConnectionInfo *coninfo)
 	EXEC SQL CONNECT TO :ifxdsn AS :ifxconname
 		USER :ifxuser USING :ifxpass WITH CONCURRENT TRANSACTION;
 
-	if (ifxGetSQLCAWarn(SQLCA_WARN_TRANSACTIONS) == 'W')
-	{
-		/* save state into connection info */
-		coninfo->tx_enabled = 1;
-	}
+	if (ifxGetSQLCAWarn(SQLCA_WARN_SET) == 'W') {
+
+		if (ifxGetSQLCAWarn(SQLCA_WARN_TRANSACTIONS) == 'W')
+		{
+			/* save state into connection info */
+			coninfo->tx_enabled = 1;
+		}
+
+		if (ifxGetSQLCAWarn(SQLCA_WARN_ANSI) == 'W') {
+			/* ANSI compliant database */
+			coninfo->db_ansi = 1;
+		}
 
-	if (ifxGetSQLCAWarn(SQLCA_WARN_ANSI) == 'W')
-		coninfo->db_ansi = 1;
+		if (ifxGetSQLCAWarn(SQLCA_WARN_NO_IFX_SE) == 'W') {
+			/* connected to an non-SE instance */
+			coninfo->is_obsolete = 0;
+		} else {
+
+			/* SQLCA_WARN_NO_IFX_SE is not set, assume SE instance */
+			coninfo->is_obsolete = 1;
+		}
+
+	} else {
+
+		/*
+		 * If no warning was set, we implicitely assume an Informix SE
+		 * instance
+		 */
+		coninfo->is_obsolete = 1;
+	}
 }
 
 int ifxStartTransaction(IfxPGCachedConnection *cached, IfxConnectionInfo *coninfo)
@@ -477,6 +499,7 @@ int ifxSetConnectionIdent(char *conname)
 
 void ifxSetConnection(IfxConnectionInfo *coninfo)
 {
+
 	EXEC SQL BEGIN DECLARE SECTION;
 	char *ifxconname;
 	EXEC SQL END DECLARE SECTION;
@@ -489,14 +512,37 @@ void ifxSetConnection(IfxConnectionInfo *coninfo)
 	ifxconname = coninfo->conname;
 	EXEC SQL SET CONNECTION :ifxconname;
 
-	if (ifxGetSQLCAWarn(SQLCA_WARN_TRANSACTIONS) == 'W')
-	{
-		/* save state into connection info */
-		coninfo->tx_enabled = 1;
+	if (ifxGetSQLCAWarn(SQLCA_WARN_SET) == 'W') {
+
+		if (ifxGetSQLCAWarn(SQLCA_WARN_TRANSACTIONS) == 'W')
+		{
+			/* save state into connection info */
+			coninfo->tx_enabled = 1;
+		}
+
+		if (ifxGetSQLCAWarn(SQLCA_WARN_ANSI) == 'W') {
+			/* ANSI compliant database */
+			coninfo->db_ansi = 1;
+		}
+
+		if (ifxGetSQLCAWarn(SQLCA_WARN_NO_IFX_SE) == 'W') {
+			/* if 'W' was set, an non-SE instance was detected */
+			coninfo->is_obsolete = 0;
+		} else {
+
+			/* SQLCA_WARN_NO_IFX_SE is not set, assume SE instance */
+			coninfo->is_obsolete = 1;
+		}
+
+	} else {
+
+		/*
+		 * If no warning was set, we implicitely assume an Informix SE
+		 * instance
+		 */
+		coninfo->is_obsolete = 1;
 	}
 
-	if (ifxGetSQLCAWarn(SQLCA_WARN_ANSI) == 'W')
-		coninfo->db_ansi = 1;
 }
 
 void ifxPrepareQuery(char *query, char *stmt_name)
diff --git a/ifx_fdw.c b/ifx_fdw.c
index e6980da..d592356 100644
--- a/ifx_fdw.c
+++ b/ifx_fdw.c
@@ -2523,7 +2523,8 @@ static IfxCachedConnection * ifxSetupConnection(IfxConnectionInfo **coninfo,
 	/*
 	 * Give a warning if we have mismatching DBLOCALE settings.
 	 */
-	if (ifxGetSQLCAWarn(SQLCA_WARN_DB_LOCALE_MISMATCH) == 'W')
+	if ((ifxGetSQLCAWarn(SQLCA_WARN_SET) == 'W')
+		&& (ifxGetSQLCAWarn(SQLCA_WARN_DB_LOCALE_MISMATCH) == 'W'))
 		elog(WARNING, "mismatching DBLOCALE \"%s\"",
 			 (*coninfo)->db_locale);
 
@@ -2531,8 +2532,8 @@ static IfxCachedConnection * ifxSetupConnection(IfxConnectionInfo **coninfo,
 	 * Give a NOTICE in case this is an INFORMIX SE
 	 * database instance.
 	 */
-	if (ifxGetSQLCAWarn(SQLCA_WARN_NO_IFX_SE) == 'W')
-		elog(NOTICE, "connected to an non-Informix SE instance");
+	if ((*coninfo)->is_obsolete == 1)
+		elog(NOTICE, "connected to a Informix SE instance");
 
 	return cached_handle;
 }
@@ -5214,6 +5215,11 @@ static void ifxConnInfoSetDefaults(IfxConnectionInfo *coninfo)
 	coninfo->username      = "\0";
 	coninfo->password      = "\0";
 
+	/*
+	 * per default assume non-SE informix instance.
+	 */
+	coninfo->is_obsolete = 0;
+
 	/* default scan mode */
 	coninfo->scan_mode     = IFX_PLAN_SCAN;
 }
diff --git a/ifx_type_compat.h b/ifx_type_compat.h
index e8910b3..f554e85 100644
--- a/ifx_type_compat.h
+++ b/ifx_type_compat.h
@@ -265,6 +265,7 @@ typedef enum IfxExtendedType
 	IFX_XTD_DBSENDRECV    = 21,
 	IFX_XTD_SRVSENDRECV   = 22,
 	IFX_XTD_FUNCARG       = 23
+
 } IfxExtendedType;
 
 /*
@@ -439,6 +440,7 @@ typedef struct IfxConnectionInfo
 	short tx_enabled; /* 0 = n tx, 1 = tx enabled */
 	int   xact_level; /* current nest level of transactions */
 	short db_ansi; /* 0 = non-ANSI database, 1 = ANSI-enabled database */
+	short is_obsolete; /* currently: 0 = non SE instance, 1 = Informix SE instance */
 	short predicate_pushdown; /* 0 = disabled, 1 = enabled */
 	short enable_blobs; /* 0 = no special BLOB support,
 						   1 = special BLOB support */