Differences

This shows you the differences between two versions of the page.

--- dba:oracle:dbms_redefinition_usage [2022/02/11 11:12] – ↷ Page moved from oracle:dbms_redefinition_usage to dba:oracle:dbms_redefinition_usage dodger
+++ dba:oracle:howtos:dbms_redefinition_usage [2023/01/31 08:26] – removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-====== [HOWTO] DBMS_REDEFINITION usage ======
-====== Previous Requirements ======
-Name of te table to compact/redefine/reindex...
-====== Official documentation ======
-[[https://docs.oracle.com/database/121/ARPLS/d_redefi.htm]]
-\\
-(Oracle can move this document at any time)
-====== Step 1: check if DBMS_REDEFINITION can be used ======
-There are multiple ways to use DBMS_REDEFINITION.
-I mainly use 2:
-  * Using PK
-  * Using ROWID
-\\
-I've been always be able to finish the whole process with any of this two methods.
-===== Step 1.1: Check Using PK =====
-<code sql>
-BEGIN
-  DBMS_REDEFINITION.CAN_REDEF_TABLE(
-   uname        => 'SCHEMA_NAME',
-   tname        => 'TABLENAME',
-   options_flag => DBMS_REDEFINITION.CONS_USE_PK);
-END;
-/
-</code>
-===== Step 1.2: Using ROWID =====
-<code sql>
-BEGIN
-  DBMS_REDEFINITION.CAN_REDEF_TABLE(
-   uname        => 'SCHEMA_NAME',
-   tname        => 'TABLENAME',
-   options_flag => DBMS_REDEFINITION.CONS_USE_ROWID);
-END;
-/
-</code>
-====== Step 2: Creating pivot table ======
-Or interim as named in oracle.
-I prefer to use DBMS_METADATA to control the 100% of the process.
-===== Step 2.1:  Using CREATE .. SELECT =====
-This is the most basic way to create the pivot table:
-<code sql>
-create table SCHEMA_NAME.INT_V as select * from SCHEMA_NAME.TABLENAME WHERE 1 = 2;
-</code>
-===== Step 2.2: Using DBMS_METADATA =====
-Obtain metadata:
-<code sql>
-SELECT DBMS_METADATA.GET_DDL('TABLE','TABLENAME', 'SCHEMA_NAME') FROM DUAL ;
-</code>
-Then modify the table name and if there's any ''LOB'' defined as ''BASICFILE'', re-define it as ''SECUREFILE'' (default in 11g and onward).
-====== Step 3: begin redefinition ======
-===== Step 3.1: Using PK =====
-<code sql>
-BEGIN
-  DBMS_REDEFINITION.START_REDEF_TABLE(
-   uname        => 'SCHEMA_NAME',
-   orig_table   => 'TABLENAME',
-   int_table    => 'INTM_TABLENAME',
-   col_mapping  => NULL,
-   options_flag => DBMS_REDEFINITION.CONS_USE_PK);
-END;
-/
-</code>
-===== Step 3.1: Using ROWID =====
-<code sql>
-BEGIN
-  DBMS_REDEFINITION.START_REDEF_TABLE(
-   uname        => 'SCHEMA_NAME',
-   orig_table   => 'TABLENAME',
-   int_table    => 'INTM_TABLENAME',
-   col_mapping  => NULL,
-   options_flag => DBMS_REDEFINITION.CONS_USE_ROWID);
-END;
-/
-</code>
-===== Step 3.1: Using ROWID with virtual columns=====
-If the table has virtual columns you'll obtain a nice:
-  ORA-01733: virtual column not allowed here
-When using DBMS_REDEFINITION.
-A little of tunning must be done while redefining the table.
-Is necessary to specify the **NON-VIRTUAL** columns and pass them to DBMS_REDEFINITION (''l_colmap''  variable):
-<code sql>
-declare
-    l_colmap varchar(512);
-begin
-    l_colmap := 'COLUMN1, COLUMN2, COLUMN3';
-    dbms_redefinition.start_redef_table
-    (
-   uname        => 'SCHEMA_NAME',
-   orig_table   => 'TABLENAME',
-   int_table    => 'INTM_TABLENAME',
-      col_mapping    => l_colmap,
-      options_flag => DBMS_REDEFINITION.cons_use_rowid );
-end;
-/
-</code>
-====== Step 4: copy table objects======
-<code sql>
-DECLARE
-num_errors PLS_INTEGER;
-BEGIN
-    DBMS_REDEFINITION.COPY_TABLE_DEPENDENTS('SCHEMA_NAME', 'TABLENAME','INTM_TABLENAME',
-    DBMS_REDEFINITION.CONS_ORIG_PARAMS, TRUE, TRUE, TRUE, TRUE, num_errors);
-    dbms_output.put_line('Num_errors = ' || num_errors);
-END;
-/
-</code>
-Then check the errors:
-<code sql>
-select object_name, base_table_name, ddl_txt from DBA_REDEFINITION_ERRORS;
-</code>
-If there're index/pk's/fk's/constraints you'll see errors there cause DBMS_REDEFENITION will try to do it twice.
-====== Step 5: Sync tables ======
-<code sql>
-BEGIN
-  DBMS_REDEFINITION.SYNC_INTERIM_TABLE('SCHEMA_NAME', 'TABLENAME', 'INTM_TABLENAME');
-END;
-/
-</code>
-====== Step 6: FINISH IT! ======
-<code sql>
-BEGIN
-  DBMS_REDEFINITION.FINISH_REDEF_TABLE('SCHEMA_NAME', 'TABLENAME', 'INTM_TABLENAME');
-END;
-/
-</code>
-====== Example ======
-<code sql>
-SYS@BAVEL12R_1>
-BEGIN
-  DBMS_REDEFINITION.CAN_REDEF_TABLE(
-   uname        => 'VOXEL',
-   tname        => 'SUPERTABLE_H',
-   options_flag => DBMS_REDEFINITION.CONS_USE_PK);
-END;
-  /
-BEGIN
-*
-ERROR at line 1:
-ORA-12089: cannot online redefine table "DODGER"."SUPERTABLE_H" with no primary key
-ORA-06512: at "SYS.DBMS_REDEFINITION", line 173
-ORA-06512: at "SYS.DBMS_REDEFINITION", line 3759
-ORA-06512: at line 2
-SYS@BAVEL12R_1>
-BEGIN
-  DBMS_REDEFINITION.CAN_REDEF_TABLE(
-   uname        => 'VOXEL',
-   tname        => 'SUPERTABLE_H',
-   options_flag => DBMS_REDEFINITION.CONS_USE_ROWID);
-END;
-  /
-PL/SQL procedure successfully completed.
-SYS@BAVEL12R_1> SELECT DBMS_METADATA.GET_DDL('TABLE', 'SUPERTABLE_H', 'VOXEL') TXT FROM DUAL ;
-TXT
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
-  CREATE TABLE "DODGER"."SUPERTABLE_H"
-   (    "INTID_FAMPROV" NUMBER(19,0) NOT NULL ENABLE,
-        "INTID_PROVEEDOR" NUMBER(19,0) NOT NULL ENABLE,
-        "STRID_FAMILIA" VARCHAR2(128),
-        "STRFAMILIA" VARCHAR2(128),
-        "INTID_FAMILIA" NUMBER(19,0) NOT NULL ENABLE,
-        "INTID_SUBFAMILIA" NUMBER(19,0) NOT NULL ENABLE,
-        "TSMODIFICADO" TIMESTAMP (6) NOT NULL ENABLE,
-        "INTMODIFIED_BY" NUMBER(19,0) NOT NULL ENABLE,
-        "LOGACTIVE" NUMBER(19,0) NOT NULL ENABLE,
-        "TSCHANGED" TIMESTAMP (6) WITH TIME ZONE
-   ) SEGMENT CREATION IMMEDIATE
-  PCTFREE 0 PCTUSED 40 INITRANS 1 MAXTRANS 255
- NOCOMPRESS LOGGING
-  TABLESPACE "DODGER"  ENABLE ROW MOVEMENT ;
-row selected.
-SYS@BAVEL12R_1>
-CREATE TABLE "DODGER"."SUPERTABLE_REDEF"
-   (    "INTID_FAMPROV" NUMBER(19,0) NOT NULL ENABLE,
-        "INTID_PROVEEDOR" NUMBER(19,0) NOT NULL ENABLE,
-        "STRID_FAMILIA" VARCHAR2(128),
-        "STRFAMILIA" VARCHAR2(128),
-        "INTID_FAMILIA" NUMBER(19,0) NOT NULL ENABLE,
-        "INTID_SUBFAMILIA" NUMBER(19,0) NOT NULL ENABLE,
-        "TSMODIFICADO" TIMESTAMP (6) NOT NULL ENABLE,
-        "INTMODIFIED_BY" NUMBER(19,0) NOT NULL ENABLE,
-        "LOGACTIVE" NUMBER(19,0) NOT NULL ENABLE,
-        "TSCHANGED" TIMESTAMP (6) WITH TIME ZONE
-   ) SEGMENT CREATION IMMEDIATE
-  PCTFREE 0 PCTUSED 40 INITRANS 1 MAXTRANS 255
- NOCOMPRESS LOGGING
-   TABLESPACE "DODGER"  ENABLE ROW MOVEMENT ;
-Table created.
-SYS@BAVEL12R_1>
-BEGIN
-  DBMS_REDEFINITION.START_REDEF_TABLE(
-   uname        => 'VOXEL',
-   orig_table   => 'SUPERTABLE_H',
-   int_table    => 'SUPERTABLE_REDEF',
-   col_mapping  => NULL,
-   options_flag => DBMS_REDEFINITION.CONS_USE_ROWID);
-END;
-  /
-PL/SQL procedure successfully completed.
-SYS@BAVEL12R_1> SYS@BAVEL12R_1>
-SYS@BAVEL12R_1>
-DECLARE
-num_errors PLS_INTEGER;
-BEGIN
-    DBMS_REDEFINITION.COPY_TABLE_DEPENDENTS('VOXEL', 'SUPERTABLE_H','SUPERTABLE_REDEF',
-    DBMS_REDEFINITION.CONS_ORIG_PARAMS, TRUE, TRUE, TRUE, TRUE, num_errors);
-    dbms_output.put_line('Num_errors = ' || num_errors);
-END;
-  /
-Num_errors = 7
-PL/SQL procedure successfully completed.
-SYS@BAVEL12R_1> SYS@BAVEL12R_1>
-SYS@BAVEL12R_1> r
-* select object_name, base_table_name, ddl_txt from DBA_REDEFINITION_ERRORS
-OBJECT_NAME                         BASE_TABLE_NAME                          DDL_TXT
------------------------------------ ---------------------------------------- ------------------------------------------------------------------------------------------------------------------------------------------------------
-SYS_C0017232                        SUPERTABLE_H                  ALTER TABLE "DODGER"."SUPERTABLE_REDEF" MODIFY ("INTID_FAMPROV" CONSTRAINT "TMP$$_SYS_C00172320" NOT NULL ENABLE NOVALIDATE)
-SYS_C0017233                        SUPERTABLE_H                  ALTER TABLE "DODGER"."SUPERTABLE_REDEF" MODIFY ("INTID_PROVEEDOR" CONSTRAINT "TMP$$_SYS_C00172330" NOT NULL ENABLE NOVALIDATE)
-SYS_C0017234                        SUPERTABLE_H                  ALTER TABLE "DODGER"."SUPERTABLE_REDEF" MODIFY ("INTID_FAMILIA" CONSTRAINT "TMP$$_SYS_C00172340" NOT NULL ENABLE NOVALIDATE)
-SYS_C0017238                        SUPERTABLE_H                  ALTER TABLE "DODGER"."SUPERTABLE_REDEF" MODIFY ("LOGACTIVE" CONSTRAINT "TMP$$_SYS_C00172380" NOT NULL ENABLE NOVALIDATE)
-SYS_C0017236                        SUPERTABLE_H                  ALTER TABLE "DODGER"."SUPERTABLE_REDEF" MODIFY ("TSMODIFICADO" CONSTRAINT "TMP$$_SYS_C00172360" NOT NULL ENABLE NOVALIDATE)
-SYS_C0017237                        SUPERTABLE_H                  ALTER TABLE "DODGER"."SUPERTABLE_REDEF" MODIFY ("INTMODIFIED_BY" CONSTRAINT "TMP$$_SYS_C00172370" NOT NULL ENABLE NOVALIDATE)
-SYS_C0017235                        SUPERTABLE_H                  ALTER TABLE "DODGER"."SUPERTABLE_REDEF" MODIFY ("INTID_SUBFAMILIA" CONSTRAINT "TMP$$_SYS_C00172350" NOT NULL ENABLE NOVALIDATE)
-rows selected.
-SYS@BAVEL12R_1>
-BEGIN
-  DBMS_REDEFINITION.SYNC_INTERIM_TABLE('VOXEL', 'SUPERTABLE_H','SUPERTABLE_REDEF');
-END;
-/
-PL/SQL procedure successfully completed.
-SYS@BAVEL12R_1>
-BEGIN
-  DBMS_REDEFINITION.FINISH_REDEF_TABLE('VOXEL', 'SUPERTABLE_H','SUPERTABLE_REDEF');
-END;
-  /
-PL/SQL procedure successfully completed.
-SYS@BAVEL12R_1>
-</code>