Want to Change Passthrough level from 1 to 2 ......

Question

[timesten@dellstudio bin]$ ttisql tt_passuser1
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Type ? or "help" for help, type "exit" to quit ttIsql.
All commands must end with a semicolon character.
connect "DSN=tt_passuser1";
Connection successful: DSN=TT_passuser1;UID=passuser1;DataStore=/d01/app/oracle/tt70/DataStore/TT_passuser1;DatabaseCharacterSet=WE8ISO8859P1;ConnectionCharacterSet=US7ASCII;DRIVER=/d01/app/oracle/tt70/TimesTen/tt70/lib/libtten.so;OracleId=db10g;Authenticate=0;PermSize=100;PassThrough=1;TypeMode=0;
(Default setting AutoCommit=1)
Command> show passthrough;
PassThrough = 1
Command> show autocommit;
autocommit = 1 (ON)
my current value for passthrough is 1 i want to chane it to 2;
when i change it it remain 1....do i have to edit manually in sys.odbc.ini file in my DSN.
Command> set passthrough 2;
Command> commit;
Command> show passthrough; "not changed"
PassThrough = 1
regards
Muh.Usman

Answer 1

When you set passthrough using the 'passthrough' command in ttisql the new value only remains in effect until you commit and then it gets reset back to the setting in the DSN. This is why you can only use the passthrough command when autocommit is disabled.
Note that the setting fof passthrough takes effect at command 'prepare' time not execute time annd is saved as part of the prepared command 9same is true when using it in applications). Consider the following sequence in ttIsql:
autocommit 0;
passthrough 3;
prepare 1 update sometabe set somecol = 4 where somepk = 100;
commit;
passthrough 1;
prepare 2 insert into anothertab values ('1', 'Some Row');
commit;
passthrough 2;
exec 1; -- the update still executes with passthrough 3
exec 2; -- the insert still executes with passthrough 1
commit;
Chris