I had two conditional processing checks for one pl/sql process to do. One "No Inline Validation Errors Displayed" check and one "Exist (SQL query returns at least one row)" check.
I thought it would be quite easy to merge it together into a "Exist (SQL query returns at least one row)" condition:
select *
from user_db_links
where UPPER(db_link) = UPPER(:P1_I_INSTANCE_NAME)
and (UPPER(username) not like UPPER(:P1_USERNAME)
or UPPER(host) not like UPPER(:P1_DB_NAME)
or :P1_PASSWORD is not null)
and wwv_flow.g_inline_validation_error_cnt = 0
-- and I tried this AND clause
-- and (select wwv_flow.g_inline_validation_error_cnt from DUAL) = 0
The result was less promising. It just didn't work. The pl/sql process never run with wwv_flow.g_inline_validation_error_cnt in it.
My workaround was to add a new item called :P1_ERROR. I wrote the amount of validation errors into the :P1_ERROR variable inside a pl/sql process which was running before the one I tried the conditional processing with.
-- pl/sql process 1.
...
SELECT wwv_flow.g_inline_validation_error_cnt INTO :P1_ERROR FROM DUAL;
-- or this: :P1_ERROR := wwv_flow.g_inline_validation_error_cnt;
...
-- pl/sql process 2.
select *
from user_db_links
where UPPER(db_link) = UPPER(:P1_I_INSTANCE_NAME)
and (UPPER(username) not like UPPER(:P1_USERNAME)
or UPPER(host) not like UPPER(:P1_DB_NAME)
or :P1_PASSWORD is not null)
and :P1_ERROR = 0
This works without any issues. Maybe one of you know why this happens? Read More »»
