Add at least single row using collection

Question

Hi all,
Iam using Apex 3.2
I have two regions.
one region contains master data and
second region contains child data in updatable report.
in scond region i have created updatable report using apex items.
While saving it should show the message if zero rows found in updatble report.
how do I write the javascript validation if zero rows in report.
the updatable report code is
select
'Delete' delete_checkbox,
APEX_ITEM.Hidden(2,x.ASSIGN_SEQ_ID,'f02_#ROWNUM#') as "ASSIGN SEQ ID",
APEX_ITEM.DISPLAY_AND_SAVE(2,x.ASSIGN_SEQ_ID,'f02_#ROWNUM#') as "ASSIGN SEQ ID_D_LINK",
APEX_ITEM.SELECT_LIST_FROM_QUERY(3,x.CRITERIA_SEQ_ID,'select CRITERIA_NAME, CRITERIA_SEQ_ID from PRFD_MMS_VENDOR_CRIT_MSTR order by CRITERIA_SEQ_ID',null,'YES','0','--Select Criteria--','f03_#ROWNUM#',null,'NO') as "Criteria",
APEX_ITEM.TEXT(4,x.WEIGHT_FACTOR,10,15,'onKeypress="if(!isNS4){if(event.keyCode < 45 || event.keyCode > 57) event.returnValue = false;}else{if(event.which < 45 || event.which > 57)return false;}"','f04_#ROWNUM#') as "Weight Factor"
from PRFD_MMS_ASSIGN_VENDOR_CRIT x
where supplier_id = v('P522_SUPPLIER')
and   PROJECT_NO  = v('P522_PROJ_NO') 
UNION
select
'Delete' delete_checkbox,
APEX_ITEM.hidden(2,null) as "ASSIGN SEQ ID",
APEX_ITEM.DISPLAY_AND_SAVE(2,null) as "ASSIGN SEQ ID_D_LINK",
APEX_ITEM.SELECT_LIST_FROM_QUERY(3,null,'select CRITERIA_NAME, CRITERIA_SEQ_ID from PRFD_MMS_VENDOR_CRIT_MSTR order by CRITERIA_SEQ_ID',null,'YES','0','--Select Criteria--','f03_#ROWNUM#',null,'NO') as "Criteria",
APEX_ITEM.TEXT(4,null,10,15,'onKeypress="if(!isNS4){if(event.keyCode < 45 || event.keyCode > 57) event.returnValue = false;}else{if(event.which < 45 || event.which > 57)return false;}"','f04_#ROWNUM#') as "Weight Factor"
from dual
WHERE  :REQUEST = 'ADD_ROWS'
connect by level <= 1please give the solution.
Thanks in advance
balu
Edited by: Balu K on Dec 15, 2010 1:40 AM
Edited by: Balu K on Dec 15, 2010 1:42 AM
Edited by: Balu K on Dec 15, 2010 1:55 AM
Edited by: Balu K on Dec 15, 2010 1:59 AM

Answer 1

Hi Gus,
try to execute
select count(*) from dual where exists (select  MAX(1)
      , sysdate
      , 'Gus'
from  dual
where 1 = 2
group by sysdate, 2)in SQL Developer. The above statement is generated by APEX for an "Exists (SQL query retruns at least one row)". Can't test it, because I don't have a 10.2.0.4.0 at hand.
Does SQL Developer now show the same behavior?
Patrick
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