Syed
It's quite easy to do that. You could take one of the partition
statistics as representative statistics and copy from the partition to
other partitions. Here are the steps:
1. Create a stat_table and export the partition statistics..
begin
DBMS_STATS.create_stat_table ( ownname=>'scott', stattab
=>'STATS_on_apr07');
end;
/
BEGIN
DBMS_STATS.export_table_stats (
ownname=>'scott',
tabname =>'your_part_table',
STATTAB =>'STATS_on_apr07',
statid =>'STATS_on_apr07',
STATOWN=>'scott'
);
end;
/
2. Then insert new rows by copying stats from a partition. For example,
in this case, I am populating stats to partitions 251-400 from 250th
partition stats. Partition names are of the format PART_01_251 through
PART_01_400 etc for us, so, you might have to change this based upon
your naming convention.
begin
FOR i in 251 .. 400 loop
INSERT INTO stats_on_apr07 (
STATID, TYPE , VERSION , FLAGS ,
C1 , C2 , C3, C4 , C5 ,
N1 , N2 , N3, N4 , N5 , N6, N7, N8, N9, n10,N11,N12,
D1 , R1 , R2 , CH1 )
select STATID, TYPE ,VERSION , FLAGS ,
C1 , 'PART_'||substr(c2,6,2)||'_'||lpad(i,3,'0') , C3, C4 , C5 ,
N1 , N2 , N3 , N4 ,N5, N6, N7, N8, N9,
n10,N11,N12,
D1 , R1 , R2 , CH1
FROM STATS_on_apr07 WHERE C2 like 'PART_%_250';
end loop;
end;
/
3. Import statistics.
4. verify.
PS: Version:10gR1. Might need adjustments for different versions.
Hello List,
Is there any way that we can set fake statistics to a particular partiton of a partitioned table? As I had asked a question sometime back that insert and other stuff are very slow on the first day of a new partition(monthly partitions). I would like to set fake statitics to a partition of a partition table.
Thanks for your time.
Jaffar
The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. If the reader of this message is not the intended recipient, you are hereby notified that your access is unauthorized, and any review, dissemination, distribution or copying of this message including any attachments is strictly prohibited. If you are not the intended recipient, please contact the sender and delete the material from any computer.
