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17.08.2016, 19:07:31
#39293516
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Зацените феномен, проявляющийся при использовании Online table redefinition :
До:OWNER CONSTRAINT_NAMECSEARCH_CONDITIONR_OWNERR_CONSTRAINT_NAMESTATUS DEFERRED VALIDATEDINVALIDCOLUMN_NAMEPOSITIONNCLFXINT_OWNERT1_PK P ENABLEDIMMEDIATEVALIDATED TRADE_ID 1N
После:OWNER CONSTRAINT_NAMECSEARCH_CONDITIONR_OWNERR_CONSTRAINT_NAMESTATUS DEFERRED VALIDATEDINVALIDCOLUMN_NAMEPOSITIONNCLFXINT_OWNERT1_PK P ENABLEDIMMEDIATEVALIDATED TRADE_ID 1Y
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Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
SQL>-- Create table
SQL>create table t1
2 (
3 trade_id NUMBER(18) constraint t1_pk primary key,
4 be_id NUMBER
5 )
6 ;
Table created.
SQL>select c.owner, c.constraint_name, c.constraint_type, c.search_condition, c.r_owner, c.r_constraint_name,
2 c.status, c.deferred, c.validated, c.invalid,
3 cc.column_name, cc.position,
4 tc.nullable
5 from all_constraints c
6 inner join all_cons_columns cc
7 on (c.owner = cc.owner and c.constraint_name = cc.constraint_name and c.table_name = cc.table_name)
8 inner join all_tab_columns tc
9 on (c.owner = tc.owner and c.table_name = tc.table_name and cc.column_name = tc.column_name)
10 where c.owner = user
11 and c.table_name = 'T1'
12 order by c.constraint_name, cc.position
13 ;
OWNER CONSTRAINT_NAME C SEARCH_CONDITION R_OWNER R_CONSTRAINT_NAME STATUS DEFERRED VALIDATED INVALID COLUMN_NAME POSITION N
------------- --------------- - ---------------- ------- ----------------- ------- --------- --------- ------- ----------- -------- -
CLFXINT_OWNER T1_PK P ENABLED IMMEDIATE VALIDATED TRADE_ID 1 N
SQL>create table i_t1
2 (
3 trade_id NUMBER(18),
4 be_id NUMBER,
5 hot_yn CHAR(1) DEFAULT 'N' NOT NULL,
6 CONSTRAINT t1_check_hot_yn CHECK (hot_yn IN ('Y','N'))
7 )
8 PARTITION BY LIST (be_id)
9 SUBPARTITION BY LIST (hot_yn)
10 ( PARTITION t1_DEFAULT VALUES (DEFAULT)
11 (SUBPARTITION t1_DEFAULT_HOT_Y VALUES('Y'),
12 SUBPARTITION t1_DEFAULT_HOT_N VALUES('N')
13 )
14 )
15 ;
Table created.
SQL>alter table i_t1 enable row movement;
Table altered.
SQL>BEGIN
2 DBMS_REDEFINITION.can_redef_table(USER, 'T1');
3 END;
4 /
PL/SQL procedure successfully completed.
SQL>--1. Start redefinition
SQL>BEGIN
2 DBMS_REDEFINITION.start_redef_table(USER, 'T1','I_T1');
3 END;
4 /
PL/SQL procedure successfully completed.
SQL>--2. Copy table dependents
SQL>DECLARE
2 v_num_errors NUMBER;
3 BEGIN
4 DBMS_REDEFINITION.copy_table_dependents(
5 uname => USER,
6 orig_table => 'T1',
7 int_table => 'I_T1',
8 copy_indexes => 0,
9 copy_triggers => TRUE,
10 copy_constraints => TRUE,
11 copy_privileges => TRUE,
12 ignore_errors => FALSE,
13 num_errors => v_num_errors,
14 copy_statistics => FALSE,
15 copy_mvlog => FALSE
16 );
17
18 IF v_num_errors > 0 THEN
19 DBMS_REDEFINITION.abort_redef_table(
20 uname => USER,
21 orig_table => 'T1',
22 int_table => 'I_T1'
23 );
24
25 RAISE_APPLICATION_ERROR(-20001,'Error in DBMS_REDEFINITION.copy_table_dependents');
26 END IF;
27
28 DBMS_REDEFINITION.sync_interim_table(
29 uname => USER,
30 orig_table => 'T1',
31 int_table => 'I_T1'
32 );
33
34 DBMS_REDEFINITION.finish_redef_table(
35 uname => USER,
36 orig_table => 'T1',
37 int_table => 'I_T1'
38 );
39 end;
40 /
PL/SQL procedure successfully completed.
SQL>select c.owner, c.constraint_name, c.constraint_type, c.search_condition, c.r_owner, c.r_constraint_name,
2 c.status, c.deferred, c.validated, c.invalid,
3 cc.column_name, cc.position,
4 tc.nullable
5 from all_constraints c
6 inner join all_cons_columns cc
7 on (c.owner = cc.owner and c.constraint_name = cc.constraint_name and c.table_name = cc.table_name)
8 inner join all_tab_columns tc
9 on (c.owner = tc.owner and c.table_name = tc.table_name and cc.column_name = tc.column_name)
10 where c.owner = user
11 and c.table_name = 'T1'
12 order by c.constraint_name, cc.position
13 ;
OWNER CONSTRAINT_NAME C SEARCH_CONDITION R_OWNER R_CONSTRAINT_NAME STATUS DEFERRED VALIDATED INVALID COLUMN_NAME POSITION N
------------- --------------- - -------------------- ------- ----------------- ------- --------- --------- ------- ----------- -------- -
CLFXINT_OWNER SYS_C0042071 C "HOT_YN" IS NOT NULL ENABLED IMMEDIATE VALIDATED HOT_YN N
CLFXINT_OWNER T1_CHECK_HOT_YN C hot_yn IN ('Y','N') ENABLED IMMEDIATE VALIDATED HOT_YN N
CLFXINT_OWNER T1_PK P ENABLED IMMEDIATE VALIDATED TRADE_ID 1 Y
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