OS환경 : Oracle Linux 7.6 (64bit)
DB 환경 : Oracle Database 19.10.0.0
방법 : 오라클 19c 파티션 테이블 통계정보 이관, 복제
오라클 19c에서 파티션 테이블에 새로운 파티션을 추가할 때 기존 파티션의 통계정보를 신규 파티션으로 복제해주는 방법을 설명함
신규 파티션 테이블 생성 및 데이터 삽입, 통계정보 수집 후 확인
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SQL>
-- 테이블 생성
drop table ptable3 purge;
create table ptable3
(
col1 varchar2(8),
col2 number
)
tablespace users
partition by range (col1)
(
partition p202101 values less than ('202102'),
partition p202102 values less than ('202103'),
partition p202103 values less than ('202104'),
partition p202104 values less than ('202105'),
partition p202105 values less than ('202106'),
partition p202106 values less than ('202107'),
partition p202107 values less than ('202108'),
partition p202108 values less than ('202109'),
partition p202109 values less than ('202110'),
partition p202110 values less than ('202111'),
partition p202111 values less than ('202112'),
partition p202112 values less than ('202113'),
partition p_max values less than (maxvalue)
)
;
-- 샘플 데이터 삽입
insert into PTABLE3 values ('202101',1);
insert into PTABLE3 values ('202102',1);
insert into PTABLE3 values ('202102',1);
insert into PTABLE3 values ('202103',1);
insert into PTABLE3 values ('202104',1);
insert into PTABLE3 values ('202105',1);
commit;
-- 통계정보 수집
exec dbms_stats.gather_table_stats('IMSI', 'PTABLE3', cascade=>TRUE);
-- 파티션 테이블 확인
set lines 200 pages 1000
col table_owner for a8
col table_name for a8
col partition_name for a8
col high_value for a10
col tablespace_name for a10
select dtp.table_owner, dtp.table_name, dtp.partition_name, dtp.high_value
, dtp.tablespace_name, dtp.initial_extent, dtp.num_rows, dtp.last_analyzed, dtp.global_stats
from dba_tab_partitions dtp, dba_segments ds
where 1=1
and dtp.partition_name = ds.partition_name(+)
and dtp.table_name = ds.segment_name(+)
and dtp.tablespace_name = ds.tablespace_name(+)
and dtp.table_name='PTABLE3'
and dtp.table_owner='IMSI'
order by 2,3;
TABLE_OW TABLE_NA PARTITIO HIGH_VALUE TABLESPACE INITIAL_EXTENT NUM_ROWS LAST_ANALYZE GLO
-------- -------- -------- ---------- ---------- -------------- ---------- ------------ ---
IMSI PTABLE3 P202101 '202102' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202102 '202103' USERS 8388608 2 17-JUL-22 YES
IMSI PTABLE3 P202103 '202104' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202104 '202105' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202105 '202106' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202106 '202107' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202107 '202108' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202108 '202109' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202109 '202110' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202110 '202111' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202111 '202112' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202112 '202113' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P_MAX MAXVALUE USERS 0 17-JUL-22 YES
13 rows selected.
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새로운 파티션 추가(split)
2022년도 월별 파티션
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SQL>
alter table PTABLE3 split partition p_max at ('202202') into (partition p202201, partition p_max);
alter table PTABLE3 split partition p_max at ('202203') into (partition p202202, partition p_max);
alter table PTABLE3 split partition p_max at ('202204') into (partition p202203, partition p_max);
alter table PTABLE3 split partition p_max at ('202205') into (partition p202204, partition p_max);
alter table PTABLE3 split partition p_max at ('202206') into (partition p202205, partition p_max);
alter table PTABLE3 split partition p_max at ('202207') into (partition p202206, partition p_max);
alter table PTABLE3 split partition p_max at ('202208') into (partition p202207, partition p_max);
alter table PTABLE3 split partition p_max at ('202209') into (partition p202208, partition p_max);
alter table PTABLE3 split partition p_max at ('202210') into (partition p202209, partition p_max);
alter table PTABLE3 split partition p_max at ('202211') into (partition p202210, partition p_max);
alter table PTABLE3 split partition p_max at ('202212') into (partition p202211, partition p_max);
alter table PTABLE3 split partition p_max at ('202213') into (partition p202212, partition p_max);
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파티션 확인
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SQL>
set lines 200 pages 1000
col table_owner for a8
col table_name for a8
col partition_name for a8
col high_value for a10
col tablespace_name for a10
select dtp.table_owner, dtp.table_name, dtp.partition_name, dtp.high_value
, dtp.tablespace_name, dtp.initial_extent, dtp.num_rows, dtp.last_analyzed, dtp.global_stats
from dba_tab_partitions dtp, dba_segments ds
where 1=1
and dtp.partition_name = ds.partition_name(+)
and dtp.table_name = ds.segment_name(+)
and dtp.tablespace_name = ds.tablespace_name(+)
and dtp.table_name='PTABLE3'
and dtp.table_owner='IMSI'
order by 2,3;
TABLE_OW TABLE_NA PARTITIO HIGH_VALUE TABLESPACE INITIAL_EXTENT NUM_ROWS LAST_ANALYZE GLO
-------- -------- -------- ---------- ---------- -------------- ---------- ------------ ---
IMSI PTABLE3 P202101 '202102' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202102 '202103' USERS 8388608 2 17-JUL-22 YES
IMSI PTABLE3 P202103 '202104' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202104 '202105' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202105 '202106' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202106 '202107' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202107 '202108' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202108 '202109' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202109 '202110' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202110 '202111' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202111 '202112' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202112 '202113' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202201 '202202' USERS NO
IMSI PTABLE3 P202202 '202203' USERS NO
IMSI PTABLE3 P202203 '202204' USERS NO
IMSI PTABLE3 P202204 '202205' USERS NO
IMSI PTABLE3 P202205 '202206' USERS NO
IMSI PTABLE3 P202206 '202207' USERS NO
IMSI PTABLE3 P202207 '202208' USERS NO
IMSI PTABLE3 P202208 '202209' USERS NO
IMSI PTABLE3 P202209 '202210' USERS NO
IMSI PTABLE3 P202210 '202211' USERS NO
IMSI PTABLE3 P202211 '202212' USERS NO
IMSI PTABLE3 P202212 '202213' USERS NO
IMSI PTABLE3 P_MAX MAXVALUE USERS NO
25 rows selected.
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신규 파티션이 추가되었고 통계정보는 없는 상태
기존 통계정보 복사
22년 01월~06월 파티션까지는 21년02월 파티션의 통계정보를 복사(row 2건)
22년 07월~max 파티션까지는 21년12월 파티션의 통계정보를 복사(row 0건)
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SQL>
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202102','p202201');
--exec dbms_lock.sleep(5);
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202102','p202202');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202102','p202203');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202102','p202204');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202102','p202205');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202102','p202206');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202112','p202207');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202112','p202208');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202112','p202209');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202112','p202210');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202112','p202211');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202112','p202212');
exec dbms_stats.copy_table_stats('IMSI','PTABLE3','P202112','p_max');
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통계정보 복제시 지나친 lock을 방지하기위해 중간에 sleep를 추가할수도있음
파티션 테이블 확인
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SQL>
set lines 200 pages 1000
col table_owner for a8
col table_name for a8
col partition_name for a8
col high_value for a10
col tablespace_name for a10
select dtp.table_owner, dtp.table_name, dtp.partition_name, dtp.high_value
, dtp.tablespace_name, dtp.initial_extent, dtp.num_rows, dtp.last_analyzed, dtp.global_stats
from dba_tab_partitions dtp, dba_segments ds
where 1=1
and dtp.partition_name = ds.partition_name(+)
and dtp.table_name = ds.segment_name(+)
and dtp.tablespace_name = ds.tablespace_name(+)
and dtp.table_name='PTABLE3'
and dtp.table_owner='IMSI'
order by 2,3;
TABLE_OW TABLE_NA PARTITIO HIGH_VALUE TABLESPACE INITIAL_EXTENT NUM_ROWS LAST_ANALYZE GLO
-------- -------- -------- ---------- ---------- -------------- ---------- ------------ ---
IMSI PTABLE3 P202101 '202102' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202102 '202103' USERS 8388608 2 17-JUL-22 YES
IMSI PTABLE3 P202103 '202104' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202104 '202105' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202105 '202106' USERS 8388608 1 17-JUL-22 YES
IMSI PTABLE3 P202106 '202107' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202107 '202108' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202108 '202109' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202109 '202110' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202110 '202111' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202111 '202112' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202112 '202113' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202201 '202202' USERS 2 17-JUL-22 YES
IMSI PTABLE3 P202202 '202203' USERS 2 17-JUL-22 YES
IMSI PTABLE3 P202203 '202204' USERS 2 17-JUL-22 YES
IMSI PTABLE3 P202204 '202205' USERS 2 17-JUL-22 YES
IMSI PTABLE3 P202205 '202206' USERS 2 17-JUL-22 YES
IMSI PTABLE3 P202206 '202207' USERS 2 17-JUL-22 YES
IMSI PTABLE3 P202207 '202208' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202208 '202209' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202209 '202210' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202210 '202211' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202211 '202212' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P202212 '202213' USERS 0 17-JUL-22 YES
IMSI PTABLE3 P_MAX MAXVALUE USERS 0 17-JUL-22 YES
25 rows selected.
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정상적으로 통계정보가 복사됨
22년 01월~06월 파티션까지는 21년02월 파티션의 통계정보가 복사되었고(row 2건)
22년 07월~max 파티션까지는 21년12월 파티션의 통계정보가 복사됨(row 0건)
참조 :
https://positivemh.tistory.com/839
100299.1, 727306.1
https://docs.oracle.com/cd/B19306_01/server.102/b14237/statviews_2098.htm#i1591118
https://docs.oracle.com/en/database/oracle/oracle-database/12.2/vldbg/partition-create-tables-indexes.html#GUID-66D19C36-C512-48DE-88B4-AFC6CCACDFEB
https://minimalistic-oracle.blogspot.com/2016/09/sql-script-to-display-partitions-and.html
http://www.oracle-wiki.net/premium:startdocsreallifeinvalidatingaplan
http://oracledbakg.blogspot.com/2009/04/invalidating-execution-plan-of-sql.html
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