Table Name Substitution with a varaible

Question

I have the following procedure....
LOOP
FETCH table_cur INTO table_rec;
EXIT WHEN NOT table_cur%FOUND;
TableID := table_rec.TableName;
Office := table_rec.OfficeNum;
Client := table_rec.CliNum;
IF Office = 'Y' AND Client = 'Y' Then
UPDATE TableID
SET OfficeNum = (SELECT OfficeNum
FROM Comd02a
WHERE Comd02a.CliNum = TableID.CliNum
AND Comd02a.LoanNum = TableID.LoanNum);
END IF;
END LOOP;
CLOSE table_cur;
TableID is a vaiable and I keep coming back with an error... How
do I make a reference to a table through a variable...
Thanks in Advance
Sally
null

Answer 1

Brian Lelek (guest) wrote:
: Rashmi Rungta (guest) wrote:
: : Hi,
: : You cannot make a direct reference to a table name thru a
: : variable. You have to use dynamic sql.
: : Hope it helps. Let me know if you need further information on
: how
: : to use dynamic sql.
: : Rashmi
: : Sally (guest) wrote:
: : : I have the following procedure....
: : : LOOP
: : : FETCH table_cur INTO table_rec;
: : : EXIT WHEN NOT table_cur%FOUND;
: : : TableID := table_rec.TableName;
: : : Office := table_rec.OfficeNum;
: : : Client := table_rec.CliNum;
: : : IF Office = 'Y' AND Client = 'Y' Then
: : : UPDATE TableID
: : : SET OfficeNum = (SELECT OfficeNum
: : : FROM
: Comd02a
: : : WHERE Comd02a.CliNum =
: TableID.CliNum
: : : AND Comd02a.LoanNum =
: : TableID.LoanNum);
: : : END IF;
: : : END LOOP;
: : : CLOSE table_cur;
: : : TableID is a vaiable and I keep coming back with an
error...
: : How
: : : do I make a reference to a table through a variable...
: : : Thanks in Advance
: : : Sally
: The previous response is correct. You must use dynamic SQL.
: With dynamic SQL, you create a string in a varchar field that
: contains the SQL statement. Then you pass that string to
Oracle
: for execution. I think that orange and white book has a good
: explanation of dynamic SQL. My copy of the book is not here,
: but I can look it up in a few days if you are still having
: trouble.
: By the way, you may want to consider using a "cursor for
loop".
: This code is more simple because you don't need and OPEN,
FETCH,
: EXIT, or CLOSE. See below:
: FOR table_rec IN table_cur
: LOOP
: END LOOP;
: Brian
Hello,
Yes, you need to use dynamic SQL. If you are using oracle 7 or
8.0.x, you can use the bundled package dbms_sql to do the dynamic
SQL. If you are using 8i (8.1.5), the PL/SQL is improved to do
the dynamic SQL directly. You can now do for example:
begin
execute immediate 'update '