Works in sql not in apex: ORA-02049 distributed transaction waiting lock

Question

Hi,
I get this error
failed to parse SQL query:
ORA-02049: timeout: distributed transaction waiting for lockwhen trying to run this query from it's page. But it works fine if I run it in the SQL console...
failed to parse SQL query:
ORA-select distinct n.notif_no,
       n.maint_work_centre,
       n.maint_work_centre_text,
       n.raised_by,
       n.notif_text,
       (select  (SAP_LONG_TEXT.NOTIFICATION_TEXT_1||SAP_LONG_TEXT.NOTIFICATION_TEXT_2||SAP_LONG_TEXT.NOTIFICATION_TEXT_3||SAP_LONG_TEXT.NOTIFICATION_TEXT_4||SAP_LONG_TEXT.NOTIFICATION_TEXT_5||SAP_LONG_TEXT.NOTIFICATION_TEXT_6||SAP_LONG_TEXT.NOTIFICATION_TEXT_7||SAP_LONG_TEXT.NOTIFICATION_TEXT_8||SAP_LONG_TEXT.NOTIFICATION_TEXT_9||SAP_LONG_TEXT.NOTIFICATION_TEXT_10||SAP_LONG_TEXT.NOTIFICATION_TEXT_11||SAP_LONG_TEXT.NOTIFICATION_TEXT_12||SAP_LONG_TEXT.NOTIFICATION_TEXT_13||SAP_LONG_TEXT.NOTIFICATION_TEXT_14||SAP_LONG_TEXT.NOTIFICATION_TEXT_15||SAP_LONG_TEXT.NOTIFICATION_TEXT_16||SAP_LONG_TEXT.NOTIFICATION_TEXT_17||SAP_LONG_TEXT.NOTIFICATION_TEXT_18||SAP_LONG_TEXT.NOTIFICATION_TEXT_19||SAP_LONG_TEXT.NOTIFICATION_TEXT_20||SAP_LONG_TEXT.NOTIFICATION_TEXT_21||SAP_LONG_TEXT.NOTIFICATION_TEXT_22||SAP_LONG_TEXT.NOTIFICATION_TEXT_23||SAP_LONG_TEXT.NOTIFICATION_TEXT_24||SAP_LONG_TEXT.NOTIFICATION_TEXT_25||SAP_LONG_TEXT.NOTIFICATION_TEXT_26||SAP_LONG_TEXT.NOTIFICATION_TEXT_27||SAP_LONG_TEXT.NOTIFICATION_TEXT_28||SAP_LONG_TEXT.NOTIFICATION_TEXT_29||SAP_LONG_TEXT.NOTIFICATION_TEXT_30||SAP_LONG_TEXT.NOTIFICATION_TEXT_31||SAP_LONG_TEXT.NOTIFICATION_TEXT_32||SAP_LONG_TEXT.NOTIFICATION_TEXT_33||SAP_LONG_TEXT.NOTIFICATION_TEXT_34||SAP_LONG_TEXT.NOTIFICATION_TEXT_35||SAP_LONG_TEXT.NOTIFICATION_TEXT_36||SAP_LONG_TEXT.NOTIFICATION_TEXT_37||SAP_LONG_TEXT.NOTIFICATION_TEXT_38||SAP_LONG_TEXT.NOTIFICATION_TEXT_39||SAP_LONG_TEXT.NOTIFICATION_TEXT_40||SAP_LONG_TEXT.NOTIFICATION_TEXT_41||SAP_LONG_TEXT.NOTIFICATION_TEXT_42||SAP_LONG_TEXT.NOTIFICATION_TEXT_43||SAP_LONG_TEXT.NOTIFICATION_TEXT_44||SAP_LONG_TEXT.NOTIFICATION_TEXT_45||SAP_LONG_TEXT.NOTIFICATION_TEXT_46||SAP_LONG_TEXT.NOTIFICATION_TEXT_47||SAP_LONG_TEXT.NOTIFICATION_TEXT_48||SAP_LONG_TEXT.NOTIFICATION_TEXT_49||SAP_LONG_TEXT.NOTIFICATION_TEXT_50) from sap_long_text@genadm where sap_long_text.notification = n.notif_no) "long",
       n.notif_date,
       n.funct_loc,
       n.order_no,
       n.notif_status,
       n.room,
       n.notif_type
from   notifications@amt n, SAP_LONG_TEXT@genadm
where  instr(':'||:P9_NOTIFTYPE||':',':'||n.NOTIF_TYPE||':')>0 and
       instr (':'||:P9_SITE||':',':'||n.site||':') > 0 and
       n.notif_date BETWEEN :P9_DATEFROM and :P9_DATETO and
       n.notif_status not like '%NOCO%'I've had this error before but I don't remember why/what happened. The page has been working fine, the error just randomly cropped up today.
And a secondary question, is there a better way to write the query (it's a copy/paste from an older query). That select within the select is ugly...

Answer 1

Hello,
Take a look at the following thread -
help ORA-02049
Is it really necessary that you always query across the DBLink? Is using local materialized views not an option for you?
John.
http://jes.blogs.shellprompt.net
http://apex-evangelists.com