Query about loops in an APEX calendar...

Question

Hi everyone,</br></br>
I would like to know how to make a loop with the following settings:</br></br>
1. I have a calendar on Application Express 3.0.1.00.08.</br>
2. I do create some events on it, and got a start and end date.</br>
3. On the calendar I can only see the event on the start date, but I need it to be seen from the start one until the end one...
</br></br>
So I went to PL/SQL and made the following tests:</br></br>
1. created a loop example and tried to understand it:</br></br>
DECLARE</br>
a NUMBER := 0;</br>
FS DATE := SYSDATE;</br>
FF DATE := (SYSDATE+5);</br></br>
BEGIN</br></br>
WHILE ( FS < FF ) LOOP</br>
a := a + 1;</br>
FS := FS + 1;</br>
dbms_output.put_line('paso ' || a); </br>
END LOOP;</br></br>
dbms_output.put_line('Dato a: ' || a);</br>
dbms_output.put_line('Dato FS: ' || FS);</br>
END;</br></br>
I do get this as an answer:</br>
paso 1</br>
paso 2</br>
paso 3</br>
paso 4</br>
paso 5</br>
Dato a: 5</br>
Dato FS: 17-MAY-08</br></br>
Statement processed.</br></br>
0.00 seconds</br></br>
2. Once I had this I decided to modify what I had:</br></br>
This is the block of code that needs to be repeated.</br></br>
select '< a title= " TGB SCHEDUL " href = "f?p = &APP_ID.:3:' || :APP_SESSION || '::::P3_ID: ' || ID || ' " > ' || EVENT_NAME || '</a>
' EVENT_NAME,
START_DATE</br>
from     APP_TGB</br></br>
So I placed it in the middel of the loop...</br></br>
DECLARE</br>
FS DATE := SYSDATE;</br>
FF DATE := (SYSDATE+5);</br></br>
BEGIN</br></br>
WHILE ( FS < FF ) LOOP</br>
select '< a title= " TGB SCHEDUL " href = "f?p = &APP_ID.:3:' || :APP_SESSION || '::::P3_ID: ' || ID || ' " > ' || EVENT_NAME || '</a>
' EVENT_NAME, START_DATE
from     APP_TGB;</br>
END LOOP;</br></br>
END;</br></br>
And got this message:</br>
1 error has occurred</br>
·     Query cannot be parsed, please check the syntax of your query. (ORA-06550: line 8, column 3: PLS-00428: an INTO clause is expected in this SELECT statement) </br></br>
Yes it was my mistake, I forgot the cursors in the selects… but here is where I do really need your help as I really don’t know how to implement them, and now with the variables that I have got.</br></br>
I do really appreciate if anyone can help me out with it.</br></br>
Best regards.</br></br>
Jaison González</br></br>

Answer 1

Hi Dimitri,<br><br>
Once again, thank you very much for your time and answer,<br><br>
1. Is it really necessary to do this for your whole table? There is no WHERE clause in your statement <br>
Yes you are right I in the block of code that I sent you, I don’t have any WHERE clause but on the tests that I made, I have the following:<br><br>
select START_DATE+level-1<br>
from ( SELECT '<a title="TGB SCHEDUL" href="f?p=&APP_ID.:3:' ||
:APP_SESSION || '::::P3_ID: ' || ID || '">' || EVENT_NAME||
'</a>
EVENT_NAME, START_DATE, END_DATE from APP_TGB WHERE ID = 141)<br>
a connect by level <= (END_DATE - START_DATE)<br><br>
But I as I have more that one event on the calendar, which are identified by different IDs, I remove it (the WHERE clause) thinking about the calendar’s convenience… <br><br>
2. I guess you want in your outer select also the event_name?
select start_date+level-1 as sdate, event_name, start_date, end_date
from (select ... )<br>
Yes, I will prove it and tell you how it works… sorry about it… <br><br>
3. Not sure what you mean with that?<br>
Right now, if I have as start date 5 and end date 10, it shows me on the first day (one) EVENT_NAME, on the second (four) EVENT_NAME, on the third (twelve) EVENT_NAME… and go on till it gets to the 10th…<br><br>
Thank you very much for your help.<br><br>
Best regards,<br><br>
Jaison