BRIDGE statement in a loop : dynamic destination and source table names ...

Question

Hello,
I can't find the right syntax to do what I need, if it's possible :
Context :
I work actualy on a migration from MS Access applications to Oracle (datas only). So I copied all MS Access Tables into Oracle and created manualy all the relationnal constraints like primary and foreign keys ('cause constraints are not included in 'Copy to Oracle').
I Have often to refresh my datas, because the MS access applications are still in use. Therefore I wrote PL/SQL scripts. They do the folowing, using dynamic SQL with 'Execute Immediate' statement :
Script 1
- disable all user's constraints
- disable all user's triggers
- truncate all user's tables
(Here, I have to do a manual copy of all MS Access tables to Oracle, checking the Append check-box, because the BRIDGE statement doesn't support 'Execute Immediate', and wait...)
Script 2
- enable all user's constraints
- enable all user's triggers
Could someone let me know how Il could do the same as :
For t in (select table_name from user_tables) loop
-- Copy the datas from an Access table into the same Oracle table
execute immediate ('BRIDGE ' || t.table_name || ' AS MyAccessConnName(select * from ' || t.table_name || ') APPEND') ;
-- News flash ...
dbms_output.put_line('Table ' || t.table_name || ' filled') ;
end loop;
-------------------------------------------------------------------------------------------------------------------------- ==> 00900. 00000 - "invalid SQL statement"
If a dynamic table name substitution is applicable in the Bridge statement from a query, I take it with joice!
Thank you for helping me...
Daniel

Answer 1

Hi Daniel,
The BRIDGE statement is just an extra command I implemented in the SQL Developer worksheet script runner.
It gets interpreted by SQL Developer and it dynamically creates (CREATE TABLE , INSERT INTO , SELECT ... ) statements and runs them against the connections specified.
It was developed to improve certain migration features of SQL Developer. We haven't really spent any time developing it into a customer friendly statement to be used in custom scripts.
Hence the lack of doc. But it is there and if you can make it work for yourself all the better.
When I say "One way of doing what you want". I mean I haven't thought about your particular problem exhaustively and I wouldn't want you to take my solution as gospel :)
If you are happy running a script in SQL Developer, but would rather not run 2 scripts , or cut and paste results around, you could SPOOL the results and execute them.
--call your other scripts to disable constraints during the data move
set echo off;
set feedback off;
set linesize 1000;
set pagesize 0;
set headsep off;
set termout off;
set verify off;
set heading off;
SET PAGES 0;
SET HEAD OFF;
spool c:\mydynamicscript.sql
select 'BRIDGE ' || table_name || ' AS MyAccessConnName(select * from ' || table_name||');' from user_tables ;
spool off
@c:\mydynamicscript.sql
--call another script to enable your constraints again
Regards,
Dermot.
SQL Developer Team.