Basic PL/SQL script needed

[Jack Overhiser]

I have taken over management of a data warehouse running on
Oracle/Windows. I would like to add some code to the daily load
processing scripts that would check that a table has been loaded, that
is, has more than 0 records. I have .bat scripts that call SQL
scripts. I'd like the SQL scripts to do a record count and if it is
zero end with a non-zero return code. I think what I want to use is a
PL/SQL block in the SQL script. I've come up with the following basic
process. Can someone fill in the correct code to make it work?
Thanks.

DECLARE
recs number := 0;
BEGIN
SELECT count(*) INTO recs FROM WarehouseTable;
IF recs = 0 THEN
EXIT FAILURE;
END IF;
END;
/

[SteveE]

Re: Basic PL/SQL script needed

Jack Overhiser wrote:

I have taken over management of a data warehouse running on
Oracle/Windows. I would like to add some code to the daily load
processing scripts that would check that a table has been loaded, that
is, has more than 0 records. I have .bat scripts that call SQL
scripts. I'd like the SQL scripts to do a record count and if it is
zero end with a non-zero return code. I think what I want to use is a
PL/SQL block in the SQL script. I've come up with the following basic
process. Can someone fill in the correct code to make it work?
Thanks.
>
DECLARE
recs number := 0;
BEGIN
SELECT count(*) INTO recs FROM WarehouseTable;
IF recs = 0 THEN
EXIT FAILURE;
END IF;
END;
/

I haven't tried this, but it should work:

WHENEVER SQLERROR EXIT FAILURE

DECLARE
recs number := 0;
BEGIN
SELECT COUNT(*) INTO recs FROM WarehouseTable WHERE ROWNUM=1;
IF recs = 0 THEN
RAISE_APPLICATI ON_ERROR(-20001,'Table empty');
END IF;
END;
/

Steve