upgrade from 3.2 to 4.1 - error handling for the unavailable database links
HelloI have a 3.2-> upgrade problem 4.1 associated with error handling for the damaged database links.
I have a conditional button Exists on a page that contains a SQL query to related tables. However, for 10 minutes every day where the target of the link database becomes a cold backup, the query fails. In the apex 3.2 old, I just had an error within the region where the button is located but otherwise, the page was still visible:
"Is not valid/not exists condition: ORA-02068: following a serious error of MYDBLINK ORA-01034: ORACLE not available ORA-27101: there is no shared memory realm."
However, in the apex 4.1.0.00.32 I get the following unhandled error and click 'OK' brings me to the edit page when logged in as a developer.
that is, the page cannot run at all so that the links to the database fail to this one area.
Treatment of error condition.
ORA-12518: TNS:listener could not hand off client connection
Technical information (only visible for developers):
is_internal_error: true
apex_error_code: APEX. CONDITION. UNHANDLED_ERROR
ora_sqlcode:-12518
ora_sqlerrm: ORA-12518: TNS:listener could not hand off client connection
Component.type: APEX_APPLICATION_PAGE_REGIONS
Component.ID: 4
Component.Name: alerts today
error_backtrace:
ORA-06512: at "SYS." WWV_DBMS_SQL', line 1041
ORA-06512: at "APEX_040100.WWV_FLOW_DYNAMIC_EXEC", line 687
ORA-06512: at "APEX_040100.WWV_FLOW_CONDITIONS", line 272
Users generally see this:
Treatment of error condition.
ORA-01034: ORACLE not available ORA-02063: preceding the line of MYDBLINK
by clicking on 'OK' takes the user to another page, don't know how the Summit decides that, but not a concern at the moment.
I did a search and read the http://www.inside-oracle-apex.com/apex-4-1-error-handling-improvements-part-1/ page, but the new apex error handling is not clear to me, and I don't know if the apex_error_handling_example provided on this page would be applicable to this situation.
Hello
It was my fault, I forgot that the code will be compiled on the fly which already fails if the table/view of deletion is not accessible. Nice that you found yourself workaround.
Concerning
Patrick
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Tags: Database
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