KEY-ENTQRY raised unhandled Exception

Question

Hi,
In master details form, I try to filter record through pre-query and the condition is as follows
v_sql_string := '( select K.CLIENT_ID, K.VISIT_ID,K.SERVICE_CD, k.Visit_Dt, k.Visit_type,k.Consultant,k.service_descr '||
               ' from ( select m.*, row_number() over(partition by m.Visit_Dt '||
               ' order by m.Visit_Dt) rn from clans_visit_summary_V m where client_id = ' || v_client_id ||
                    ' ) k ';
v_def_where := 'where k.rn = 1 '||') ';
Actual query is
select client_id,Visit_Dt, Visit_type,Consultant,service_descr
from
( select m.*, row_number() over(partition by m.Visit_Dt order by m.Visit_Dt) rn
from clans_visit_summary_V m where client_id = 21503
) k
where k.rn = 1 order by visit_Dt ;
The query is working fine for the first time.. But, If i would like to query again, oracle returned the error as follows
FRM-40735 KEY-ENTQRY Trigger raised unhandled exception ORA-06502.
Will you give your suggesion to fix it.
Regards,
Murali

Answer 1

Murali,
Can you take your query in the Pre-Query trigger and run it in SQL*Plus? Looking at your code, it looks like the cause of the 6502 error is your ONETIME_WHERE.
v_sql_string := '( select K.CLIENT_ID, K.VISIT_ID, K.SERVICE_CD, '
              ||'         k.Visit_Dt, k.Visit_type,k.Consultant,k.service_descr '
              ||'   from ( select m.*, row_number() over(partition by m.Visit_Dt '
              ||'           order by m.Visit_Dt) rn '
              ||'           from clans_visit_summary_V m where client_id = ' || v_client_id
              ||' ) k ';
v_def_where := 'where k.rn = 1 '||') ';
Set_block_property(v_trigger_block,QUERY_DATA_SOURCE_NAME, v_sql_string);
Set_block_property(v_trigger_block, ONETIME_WHERE, v_def_where);You change the WHERE clause of the block to k.rn = 1, but referencing "*k.rn*" doesn't look like valid SQL to me because you are selecting multiple values from your RN Alias (in-line view) therefore, I don't see how you could compare k.rn to the value of 1.
Also, what version of Oracle Forms are you using? You may be running into a limitation of Forms where it does not support the Analytical Functions you have in your query. From what I could quickly find, Analytical Functions are only supported in Forms 10.1.2 or higher and the Database must be 10.1 or higher. If this is the case, perhaps you could create a view on the database and base your block on the view.
Hope this helps.
Craig...
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