A sql query that take forever to finish it's execution

Question

hi,
i am using oracle 10g/RedHat Entreprise linux 5.
i turn to you to help understand some odd behavior of a sql statement.
when i execute this statement:
create table ps_m_instop_profil NOLOGGING parallel(degree 3) as
SELECT b.topinstprodid AS insp, ltrim(rtrim(c.attr_item_id||c.attribute_value)) AS profil,
d.inst_prod_status AS statuts
FROM sysadm.ps_rf_attr_insp@DBCRM c,
sysadm.ps_rf_inst_prod_st@DBCRM d,
sysadm.ps_rf_inst_prod@DBCRM b,
sysadm.ps_rb_attribute@DBCRM e
WHERE c.attribute_id IN
('PPSPROFILE_X',
'PPSPROFILE_Y',
'PPSPROFILE_E',
'PPSPROFILE',
'PPSPROFILE_G1','INPROFILE_O','INPROFILE_U')
AND b.inst_prod_id = c.inst_prod_id
AND e.attribute_id = c.attribute_id
AND e.m_crm_attr_typage = 'M_PROFILE'
AND b.topinstprodid = d.inst_prod_id
AND d.inst_prod_status = 'INS';
if the number of ligne returned is small aproximatively 10000 the request end.
if the number of line is 13500000 (the number that should be returned +/- some thousand raws) the request hang indefinitely.
i am asking if it's due to some problems due to the dblinks then what should i check and how can i fix it.
this statement is very important it's the first step in my plsql script and if the request don't end normaly i can't continue the execution of the script.
thank you in advance.

Answer 1

As you are creating a table, could you not just create a table for each of your database links
eg
create table ps_rf_attr_insp as select * from sysadm.ps_rf_attr_insp@DBCRM;
create table ps_rf_inst_prod_st as sysadm.ps_rf_inst_prod_st@DBCRM;
create table ps_rf_inst_prod_st as sysadm.ps_rf_inst_prod@DBCRM;
create table ps_rb_attribute as sysadm.ps_rb_attribute@DBCRM;and then all your queries can run locally,
plus you can any appropriate indexes etc