After executing sql from batch, its disconnecting

Question

Hello All,
I have written a batch program to execute a pl/sql procedure. But after execution, it disconnects.
But i want to continue in the same session
echo exec tracer.trace_pck.start_('alter session set sql_trace=true') | sqlplus hr/hr
Output:
Press any key to Enable Tracing
SQL*Plus: Release 11.2.0.2.0 Production on Thu Oct 10 15:59:56 2013
Copyright (c) 1982, 2010, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Express Edition Release 11.2.0.2.0 - Production
SQL>
PL/SQL procedure successfully completed.
SQL> Disconnected from Oracle Database 11g Express Edition Release 11.2.0.2.0 -
Production
Trace Enabled Successfully. Press any key to input you sql

Answer 1

If you are using a batch file I assume you are using the windows OS.
Essentially what you need to do is to call a sql file from the batch file and then get the sql file to call all the other files.
Batchfile test.bat  calls sql file test.sql
sqlplus  <username>/password @test.sql
test.sql calls test1.sql and test2.sql and then exits
@test1.sql;
@test2.sql;
exit;
test1.sql shows the current sid, and serial# fro our session and our filename
select 'test1',sid,serial# from v$session
where audsid=userenv('sessionid');
test2.sql shows the current sid, and serial# for our session and our filename
select 'test2',sid,serial# from v$session
where audsid=userenv('sessionid');
When you run this you get t output similar to the following: (Your SID and Serial# will be different )
'TEST        SID    SERIAL#
test1        771         97
'TEST        SID    SERIAL#
test2        771         97
This shows that two separate sql files were called but are still in the same session