Required clarification for the below code:

Question

Hi All,
For one of my requiremnet, i found one solution which worked as expected.. But i was not able to understand the logic.. Can any one explain me the below
syntax what exactly the meaning for the below code:
Code:
SELECT NULL
FROM apex_application_page_ir_cond cond
WHERE cond.application_id = v('APP_ID')
AND cond.page_id = v('APP_PAGE_ID')
AND cond.condition_type = 'Filter'
AND cond.condition_enabled = 'Yes'
AND cond.report_id = (SELECT report_id
FROM apex_application_page_ir_rpt
WHERE application_id = v('APP_ID')
AND page_id = v('APP_PAGE_ID')
AND application_user = v('APP_USER')
AND report_type = 'SESSION'
AND TO_CHAR (session_id) = v('SESSION')
AND report_name IS NULL))
For your refernec i have enclosed the link also
URL : Re: Interactive_Report with Search Bar only
Thanks,
Anoo..

Answer 1

Anoo,
Two things. First, it makes things a lot easier if you put "{code}" (no quotes) around your SQL when you post it:
SELECT rowid "EDIT", attr_code,ATTR_ATCL_CODE "Atcl Code", attr_description, attr_atcl_code,
                attr_abbreviation,
                attr_include_short_desc "Include short desc",
                attr_include_long_desc "Include long desc",
                attr_attr_type "AttrType", rowid "DELETE"
           FROM t_new WHERE EXISTS (SELECT 1 FROM APEX_APPLICATION_PAGE_IR_COND WHERE APPLICATION_ID = :APP_ID AND PAGE_ID = :APP_PAGE_ID AND CONDITION_ENABLED = 'Yes'
AND APPLICATION_USER = :APP_USER) ORDER BY attr_description;Though the spacing still needs work, it's a little easier to read.
Second, your query's exist clause just checks for an enabled condition, without checking the condition type. Without checking, I'd guess that either APEX creates at least one internal condition, or that your IR has a default condition on it (other than a filter). Try adding the condition_type constraint to your where clause to see if that fixes it.
Also, I noted that you don't have the extra code for getting the report_id. It shouldn't be necessary, since there's currently only support for one IR per page, but you asked what the differences are.
-David