2026-03-12 20:23:15
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248
csierra/cs_redef_table_no_dedup_OLD.sql
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248
csierra/cs_redef_table_no_dedup_OLD.sql
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----------------------------------------------------------------------------------------
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--
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-- File name: cs_redef_table_no_dedup.sql
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--
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-- Purpose: Table Redefinition removing LOB deduplication
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--
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-- Author: Carlos Sierra
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--
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-- Version: 2021/10/15
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--
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-- Usage: Execute connected to PDB.
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--
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-- Enter table name and owner when requested.
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--
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-- Example: $ sqlplus / as sysdba
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-- SQL> @cs_redef_table_no_dedup.sql
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--
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-- Notes: Developed and tested on 12.1.0.2.
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--
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---------------------------------------------------------------------------------------
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--
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@@cs_internal/cs_primary.sql
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@@cs_internal/cs_cdb_warn.sql
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@@cs_internal/cs_set.sql
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@@cs_internal/cs_def.sql
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@@cs_internal/cs_blackout.sql
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@@cs_internal/cs_file_prefix.sql
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--
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DEF cs_script_name = 'cs_redef_table_no_dedup';
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--
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DEF total_MB = '';
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DEF table_MB = '';
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DEF indexes_MB = '';
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DEF lobs_MB = '';
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--
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PRO
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PRO 1. Table Name:
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DEF table_name = '&1.';
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UNDEF 1;
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COL p_table_name NEW_V p_table_name NOPRI;
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SELECT table_name AS p_table_name
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FROM dba_tables
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WHERE table_name = UPPER(TRIM('&&table_name.'))
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AND ROWNUM = 1
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/
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--
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COL owner NEW_V owner FOR A30 HEA 'TABLE_OWNER';
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SELECT t.owner
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FROM dba_tables t
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WHERE t.table_name = '&&p_table_name.'
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ORDER BY 1
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/
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PRO
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PRO 2. Table Owner:
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DEF p_table_owner = '&2.';
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UNDEF 2;
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COL p_table_owner NEW_V p_table_owner FOR A30;
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SELECT owner AS p_table_owner
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FROM dba_tables
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WHERE table_name = '&&p_table_name.'
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AND owner = UPPER(TRIM(COALESCE('&&p_table_owner.', '&&owner.')))
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AND ROWNUM = 1
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/
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COL p_tablespace_name NEW_V p_tablespace_name FOR A30 NOPRI;
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SELECT tablespace_name AS p_tablespace_name
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FROM dba_tables
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WHERE owner = '&&p_table_owner.'
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AND table_name = '&&p_table_name.'
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/
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--
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PRO 3. Degree of Parallelism: [{1}|0,1,2,4]
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DEF p_dop = '&3.';
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UNDEF 3;
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COL p_dop NEW_V p_dop NOPRI;
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SELECT CASE WHEN '&&p_dop.' IN ('0','1','2','4') THEN '&&p_dop.' ELSE '1' END AS p_dop FROM DUAL
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/
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--
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SELECT '&&cs_file_prefix._&&cs_script_name._&&p_table_owner..&&p_table_name.' cs_file_name FROM DUAL;
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DEF cs_file_name_p = "&&cs_file_name.";
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DEF cs_script_name_p = "&&cs_script_name.";
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--
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@@cs_internal/cs_spool_head.sql
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PRO SQL> @&&cs_script_name..sql "&&p_table_name." "&&p_table_owner."
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@@cs_internal/cs_spool_id.sql
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--
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PRO TABLE_OWNER : &&p_table_owner.
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PRO TABLE_NAME : &&p_table_name.
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PRO TABLESPACE : &&p_tablespace_name.
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--
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SPO OFF;
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@@cs_table.sql "&&p_table_owner." "&&p_table_name."
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SET TIMI OFF ECHO OFF VER OFF FEED OFF;
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DEF total_MB_b = "&&total_MB.";
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DEF table_MB_b = "&&table_MB.";
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DEF indexes_MB_b = "&&indexes_MB.";
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DEF lobs_MB_b = "&&lobs_MB.";
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DEF scp_b = "scp &&cs_host_name.:&&cs_file_prefix._&&cs_script_name.*.txt &&cs_local_dir."
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--
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SPO &&cs_file_name_p..txt APP
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PRO
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PRO DBMS_REDEFINITION.REDEF_TABLE
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PRO ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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SET TIMI ON ECHO ON VER ON FEED ON;
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--
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ALTER SESSION SET DDL_LOCK_TIMEOUT = 10;
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ALTER SESSION SET "_kdlxp_lobcompress" = TRUE;
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ALTER SESSION SET "_kdlxp_lobcmplevel" = 2;
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ALTER SESSION SET "_kdlxp_lobdeduplicate" = FALSE;
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--
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COL deduplication_count NEW_V deduplication_count NOPRI;
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SELECT COUNT(*) AS deduplication_count FROM dba_lobs WHERE owner = '&&p_table_owner.' AND table_name = '&&p_table_name.' AND deduplication = 'LOB';
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COL table_name_redef NEW_V table_name_redef NOPRI;
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SELECT SUBSTR('&&p_table_name.', 1, 24)||'_R3D3F' AS table_name_redef FROM DUAL;
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COL table_name_backup NEW_V table_name_backup NOPRI;
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SELECT SUBSTR('&&p_table_name.', 1, 24)||'_BAKUP' AS table_name_backup FROM DUAL;
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--
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BEGIN
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-- SPEED UP INDEX CREATION and REDEF
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EXECUTE IMMEDIATE 'ALTER SESSION SET WORKAREA_SIZE_POLICY=MANUAL';
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EXECUTE IMMEDIATE 'ALTER SESSION SET HASH_AREA_SIZE=2100000000';
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EXECUTE IMMEDIATE 'ALTER SESSION SET SORT_AREA_SIZE=2100000000';
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IF '&&p_dop.' NOT IN ('0', '1') THEN
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EXECUTE IMMEDIATE 'ALTER SESSION SET PARALLEL_DEGREE_POLICY=auto';
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EXECUTE IMMEDIATE 'ALTER SESSION FORCE PARALLEL DDL PARALLEL &&p_dop.';
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EXECUTE IMMEDIATE 'ALTER SESSION FORCE PARALLEL DML PARALLEL &&p_dop.';
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EXECUTE IMMEDIATE 'ALTER SESSION FORCE PARALLEL QUERY PARALLEL &&p_dop.';
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END IF;
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END;
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/
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--
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SET SERVEROUT ON;
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WHENEVER SQLERROR EXIT FAILURE;
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ALTER SESSION SET ddl_lock_timeout = 30;
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DECLARE
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l_num_errors PLS_INTEGER;
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BEGIN
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DBMS_REDEFINITION.CAN_REDEF_TABLE(uname=>'&&p_table_owner.', tname=>'&&p_table_name.');
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IF &&deduplication_count. = 0 THEN
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DBMS_REDEFINITION.REDEF_TABLE(uname=>'&&p_table_owner.', tname=>'&&p_table_name.', table_part_tablespace=>'&&p_tablespace_name.', lob_compression_type=>'COMPRESS MEDIUM');
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ELSE
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-- Create new table
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EXECUTE IMMEDIATE 'CREATE TABLE &&p_table_owner..&&table_name_redef. AS SELECT * FROM &&p_table_owner..&&p_table_name. WHERE 1 = 2';
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-- change the not null columns
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FOR i IN (SELECT column_name FROM dba_tab_columns WHERE owner = '&&p_table_owner.' AND table_name = '&&table_name_redef.' AND nullable = 'N')
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LOOP
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EXECUTE IMMEDIATE 'ALTER TABLE &&p_table_owner..&&table_name_redef. MODIFY '||i.column_name||' NULL';
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END LOOP;
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-- Backup old table
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EXECUTE IMMEDIATE 'CREATE TABLE &&p_table_owner..&&table_name_backup. AS SELECT * FROM &&p_table_owner..&&p_table_name. WHERE 1 = 2';
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EXECUTE IMMEDIATE 'INSERT /*+ APPEND PARALLEL(&&p_dop.) */ INTO &&p_table_owner..&&table_name_backup. SELECT /*+ PARALLEL(&&p_dop.) */ * FROM &&p_table_owner..&&p_table_name.';
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-- Start Redefinition
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DBMS_REDEFINITION.start_redef_table(uname=>'&&p_table_owner.', orig_table=>'&&p_table_name.', int_table=>'&&table_name_redef.');
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-- Optionally synchronize new table with interim data before index creation
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DBMS_REDEFINITION.sync_interim_table(uname=>'&&p_table_owner.', orig_table=>'&&p_table_name.', int_table=>'&&table_name_redef.');
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-- Copy dependents.
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DBMS_REDEFINITION.copy_table_dependents(
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uname => '&&p_table_owner.',
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orig_table => '&&p_table_name.',
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int_table => '&&table_name_redef.',
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copy_indexes => 1, -- Default
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copy_triggers => FALSE, -- Default
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copy_constraints => TRUE, -- Default
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copy_privileges => TRUE, -- Default
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ignore_errors => FALSE, -- Default
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num_errors => l_num_errors,
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copy_statistics => TRUE, -- Default
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copy_mvlog => FALSE -- Default
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);
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DBMS_OUTPUT.put_line('num_errors=' || l_num_errors);
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-- Complete redefinition
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DBMS_REDEFINITION.finish_redef_table(uname=>'&&p_table_owner.', orig_table=>'&&p_table_name.', int_table=>'&&table_name_redef.', dml_lock_timeout=>30);
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END IF;
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END;
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/
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WHENEVER SQLERROR CONTINUE;
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SET SERVEROUT OFF;
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--
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-- Disable PX
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BEGIN
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-- SPEED UP INDEX CREATION and REDEF
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EXECUTE IMMEDIATE 'ALTER SESSION SET WORKAREA_SIZE_POLICY=AUTO';
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IF '&&p_dop.' NOT IN ('0', '1') THEN
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EXECUTE IMMEDIATE 'ALTER SESSION SET PARALLEL_DEGREE_POLICY=manual';
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EXECUTE IMMEDIATE 'ALTER SESSION DISABLE PARALLEL DDL';
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EXECUTE IMMEDIATE 'ALTER SESSION DISABLE PARALLEL DML';
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EXECUTE IMMEDIATE 'ALTER SESSION DISABLE PARALLEL QUERY';
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END IF;
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END;
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/
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--
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-- Remove DOP on Table and Indexes
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BEGIN
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IF '&&p_dop.' NOT IN ('0', '1') THEN
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EXECUTE IMMEDIATE 'ALTER TABLE &&p_table_owner..&&p_table_name. NOPARALLEL';
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FOR i IN (SELECT owner, index_name FROM dba_indexes WHERE table_owner = '&&p_table_owner.' AND table_name = '&&p_table_name.' AND index_type <> 'LOB')
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LOOP
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EXECUTE IMMEDIATE 'ALTER INDEX '||i.owner||'.'||i.index_name||' NOPARALLEL';
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END LOOP;
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END IF;
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END;
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/
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--
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SET TIMI OFF ECHO OFF VER OFF FEED OFF;
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--
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SPO OFF;
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@@cs_table.sql "&&p_table_owner." "&&p_table_name."
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SET TIMI OFF ECHO OFF VER OFF FEED OFF;
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DEF total_MB_a = "&&total_MB.";
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DEF table_MB_a = "&&table_MB.";
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DEF indexes_MB_a = "&&indexes_MB.";
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DEF lobs_MB_a = "&&lobs_MB.";
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DEF scp_a = "scp &&cs_host_name.:&&cs_file_prefix._&&cs_script_name.*.txt &&cs_local_dir."
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--
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COL type FOR A10 HEA 'OBJECT';
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COL MB_before FOR 99,999,990.0;
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COL MB_after FOR 99,999,990.0;
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COL MB_saved FOR 99,999,990.0;
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SPO &&cs_file_name_p..txt APP
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PRO
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PRO TABLE_OWNER : &&p_table_owner.
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PRO TABLE_NAME : &&p_table_name.
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PRO TABLESPACE : &&p_tablespace_name.
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PRO
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PRO REDEF_TABLE RESULTS
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PRO ~~~~~~~~~~~~~~~~~~~
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SELECT 'Table:' AS type, TO_NUMBER('&&table_MB_b.') AS MB_before, TO_NUMBER('&&table_MB_a.') AS MB_after, TO_NUMBER('&&table_MB_b.') - TO_NUMBER('&&table_MB_a.') AS MB_saved FROM DUAL
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UNION ALL
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SELECT 'Index(es):' AS type, TO_NUMBER('&&indexes_MB_b.') AS MB_before, TO_NUMBER('&&indexes_MB_a.') AS MB_after, TO_NUMBER('&&indexes_MB_b.') - TO_NUMBER('&&indexes_MB_a.') AS MB_saved FROM DUAL
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UNION ALL
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SELECT 'Lob(s):' AS type, TO_NUMBER('&&lobs_MB_b.') AS MB_before, TO_NUMBER('&&lobs_MB_a.') AS MB_after, TO_NUMBER('&&lobs_MB_b.') - TO_NUMBER('&&lobs_MB_a.') AS MB_saved FROM DUAL
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UNION ALL
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SELECT 'Total:' AS type, TO_NUMBER('&&total_MB_b.') AS MB_before, TO_NUMBER('&&total_MB_a.') AS MB_after, TO_NUMBER('&&total_MB_b.') - TO_NUMBER('&&total_MB_a.') AS MB_saved FROM DUAL
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/
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PRO
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PRO SQL> @&&cs_script_name_p..sql "&&p_table_name." "&&p_table_owner." "&&p_dop."
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--
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DEF cs_script_name = "&&cs_script_name_p.";
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@@cs_internal/cs_spool_tail.sql
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PRO
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PRO If you want before and after details on &&p_table_name. table, index(es) and lob(s):
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PRO &&scp_b.
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PRO &&scp_a.
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@@cs_internal/cs_undef.sql
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@@cs_internal/cs_reset.sql
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--
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PRO Manually remove original table, which now has the name of the new table; and also backup table
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PRO DROP TABLE &&p_table_owner..&&table_name_redef. PURGE;;
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PRO DROP TABLE &&p_table_owner..&&table_name_backup. PURGE;;
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