Appending BEGIN EXCEPTION lines into plsql file using sed - plsql

Question

I have a few sql files which contain thousands of INSERT statements. The problem when executing these scripts is that some of them violate the unique constraint.
I originally did something like this:
BEGIN
INSERT INTO .....;
INSERT INTO .....;
...
EXCEPTION
WHEN DUP_VAL_ON_INDEX THEN
null;
END;
/
EXIT;
However it seems the first instance where the exception occurs will cause the entire block to end, so the rest of the statements are not executed.
Since the Oracle version I'm using is not 11, I can't use the nice CONTINUE command. So I am thinking of doing something like this for each INSERT INTO statement:
BEGIN
INSERT INTO ....;
EXCEPTION
WHEN DUP_VAL_ON_INDEX THEN
null;
END;
/
...
How can I use sed to read each line in the sql file, scan for the words "INSERT INTO" and if that exists, then append the BEGIN and EXCEPTION lines in between the INSERT INTO line? The reason is, sometimes a line is just a comment and I don't want to append to that.

Answer 1

It's not clear if you are trying to add BEGIN before a block of INSERT INTO lines, or if you simply want to add BEGIN/EXCEPTION lines around each INSERT INTO line. If the latter:
sed '/^ *INSERT INTO/{ i\
BEGIN
a\
EXCEPTION
}' input-file

Answer 2

You can fix this problem in more than one way. One sloution is to detect that record is not duplicate before inserting. This can be done like this
select cout(*) INTO v_count
Fron table1 tb
where tb.column_name1 = val1;
IF v_count == 0 THEN
insert into table1 values (val1, vale2....);
END IF;
Here you are inserting only when there is no duplication.
Another way can be create a procedure and call the procedure instead of insert.
Here is psedo code
create procedure insert_row (val1 varchar2, val2 varchar2)
IS
BEGIN
INSERT INTO ....;
EXCEPTION
WHEN DUP_VAL_ON_INDEX THEN
null;
END;
This procedure will handle exception due to duplicate record in calling procedure.
You can also write a loop. That depend on your data and logic of the program. Pdedo code is
Loop
/* get the date from the cursor*/
fetch cursor_c into record_r
EXIT WHEN cursor%NOTFOUND;
BEGIN
INSERT INTO .....;
EXCEPTION
WHEN DUP_VAL_ON_INDEX THEN
null;
END;
END LOOP;
For getting all inserts use simple grep -i statement. This will collect all inserts in file. You can write a PL/SQL or C/C++/Java language program to generate new SQL script.