Skip gather stats for a partition | table from the gather_stats_job in 10g

Question

Hi all,
Can we skip gather statistics for a table or a partition in a partitioned-table from the GATHER_STATS_JOB in Oracle 10g ?
(cause that partition store in an offline-datafile, so GATHER_STATS_JOB had errors when running in sheduled).
Thanks.
Edited by: user8710247 on Nov 26, 2011 6:41 PM

Answer 1

GATHER_TABLE_STATS will default to GRANULARITY 'AUTO' which will include Global and Partition Statistics. Global Statistics have to be across all the Partitions -- so Oracle will attempt to read all the partitions for this !
You need to run GATHER_TABLE_STATS with GRANULARITY 'PARTITION' and naming the other Partitions --- i.e. run it for each of the online partitions.
See :
SQL> create table XYZ (col_1  number, col_2 varchar2(5))
  2  partition by range (col_1)
  3  (partition P1 values less than (10) tablespace HEMANT,
  4  partition P2 values less than (100) tablespace USERS)
  5  /
Table created.
SQL> insert into XYZ values (5,'Five');
1 row created.
SQL> insert into XYZ values (50,'Fifty');
1 row created.
SQL> exec dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,granularity=>'ALL');
PL/SQL procedure successfully completed.
SQL> select partition_name, tablespace_name , num_rows, sample_size from user_tab_partitions
  2  where table_name = 'XYZ'
  3  /
PARTITION_NAME                 TABLESPACE_NAME                  NUM_ROWS
SAMPLE_SIZE
P1                             HEMANT                                  1
          1
P2                             USERS                                   1
          1
SQL>
SQL> exec dbms_stats.lock_table_stats('','XYZ');
PL/SQL procedure successfully completed.
SQL> alter tablespace HEMANT offline;
Tablespace altered.
SQL> exec dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,granularity=>'ALL');
BEGIN dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,granularity=>'ALL'); END;
ERROR at line 1:
ORA-20005: object statistics are locked (stattype = ALL)
ORA-06512: at "SYS.DBMS_STATS", line 13159
ORA-06512: at "SYS.DBMS_STATS", line 13179
ORA-06512: at line 1
SQL>
SQL> exec dbms_stats.unlock_table_stats('','XYZ');
PL/SQL procedure successfully completed.
SQL> exec dbms_stats.lock_partition_stats('','XYZ','P1');
PL/SQL procedure successfully completed.
SQL> exec dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,granularity=>'ALL');
BEGIN dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,granularity=>'ALL'); END;
ERROR at line 1:
ORA-00376: file 2 cannot be read at this time
ORA-01110: data file 2:
'/usr/oracle/oradata/MONDB/datafile/o1_mf_hemant_7d6m8zkx_.dbf'
ORA-06512: at "SYS.DBMS_STATS", line 13159
ORA-06512: at "SYS.DBMS_STATS", line 13179
ORA-06512: at line 1
SQL>
SQL> exec dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,partname=>'P2');
BEGIN dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,partname=>'P2'); END;
ERROR at line 1:
ORA-00376: file 2 cannot be read at this time
ORA-01110: data file 2:
'/usr/oracle/oradata/MONDB/datafile/o1_mf_hemant_7d6m8zkx_.dbf'
ORA-06512: at "SYS.DBMS_STATS", line 13159
ORA-06512: at "SYS.DBMS_STATS", line 13179
ORA-06512: at line 1
SQL> exec dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,partname=>'P2',granularity=>'GLOBAL AND PARTITION');
BEGIN dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,partname=>'P2',granularity=>'GLOBAL AND PARTITION'); END;
ERROR at line 1:
ORA-00376: file 2 cannot be read at this time
ORA-01110: data file 2:
'/usr/oracle/oradata/MONDB/datafile/o1_mf_hemant_7d6m8zkx_.dbf'
ORA-06512: at "SYS.DBMS_STATS", line 13159
ORA-06512: at "SYS.DBMS_STATS", line 13179
ORA-06512: at line 1
SQL>
SQL> exec dbms_stats.gather_table_stats('','XYZ',estimate_percent=>100,partname=>'P2',granularity=>'PARTITION');
PL/SQL procedure successfully completed.
SQL>Hemant K Chitale