Problem with Native SQL DB connection.

Hi Gurus,
Depending on the value of a parameter (a or b)
I create 2 connections.
In both the cases connection is made as follows.
EXEC SQL.
CONNECT TO :CONNECTIONNAME AS :SY-UNAME.
ENDEXEC.
(Where connection name is different in both the cases & accessing DB table is also different).
Now it gives me following dump when both the cases are executed one by one.
EXSQL_ILLEGAL_CONNECTION
How to avoid this dump ?
Thanks in Advance,
deepanadhi.

You can't use SY-UNAME in the Native Sql, So give the DB connection name

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Some types, such as numeric columns, expect values in a particular format. This is particularly important in connection with character types, for example, when you want to write an ABAP character field (type C) into an integer column.
Native SQL for Oracle
Native SQL for Informix
Native SQL for DB2 Common Server
http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3b8b358411d1829f0000e829fbfe/content.htm

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