DB2分区表删除和添加分区

PROCEDURE DB2USER.TOOLS_PARTITION_TABLE_SHOW (VARCHAR ()); CREATE OR REPLACE PROCEDURE Tools_partition_table_show(IN ETL_DATE VARCHAR(8)) /****************************************************************************** NAME: PURPOSE: REVISIONS: Ver Date Author Description --------- ---------- ------------ ------------------------------------ 1.0 2015-07-22 Zen 1. 作为分区表添加和快速删除分区的一个示例 供有相同需求的脚本参考。 ******************************************************************************/ LANGUAGE SQL BEGIN DECLARE V_LOCATION VARCHAR(100); DECLARE V_START_TIME TIMESTAMP; DECLARE V_SQLMSG VARCHAR(255); DECLARE V_CNT INT; DECLARE V_PARTITION_NAME VARCHAR(50); DECLARE V_PARTITION_END VARCHAR(50); DECLARE EXIT HANDLER FOR SQLEXCEPTION BEGIN GET DIAGNOSTICS EXCEPTION 1 V_SQLMSG = MESSAGE_TEXT; CALL DB2USER.PRO_LOG(ETL_DATE,‘Tools_partition_table_show‘,‘测试分区表作业方式‘,V_START_TIME,current timestamp,‘ERROR‘,V_LOCATION,V_SQLMSG); END; /*清空目标表*/ SET V_START_TIME = current timestamp; SET V_LOCATION = ‘清空数据‘; /* DELETE FROM DB2USER.S_CLM_RATE_POL_AAA WHERE BBQ = SUBSTR(ETL_DATE,1,6); COMMIT;*/ SET V_LOCATION = ‘测试保单赔率表的抽取开始‘; SET V_PARTITION_NAME = ‘P‘||SUBSTR(ETL_DATE,1,6); SET V_PARTITION_END = TO_CHAR(add_months(TO_DATE(ETL_DATE,‘YYYYMMDD‘),1),‘YYYYMM‘); --SELECT TO_CHAR(add_months(TO_DATE(ETL_DATE,‘YYYYMMDD‘),1),‘YYYYMM‘) INTO V_PARTITION_END FROM sysibm.dual; --判断分区是否存在，如果存在，数据转出删除 SELECT COUNT(*) INTO V_CNT FROM syscat.datapartitions t WHERE tabschema=‘DB2USER‘ AND tabname=‘S_CLM_RATE_POL_AAA_TEST‘ AND datapartitionname=V_PARTITION_NAME ; IF V_CNT=1 THEN -- 分区数据转出 EXECUTE IMMEDIATE ‘ALTER TABLE S_CLM_RATE_POL_AAA_test DETACH PARTITION ‘||V_PARTITION_NAME||‘ INTO DB2USER.TEMP_S_CLM_RATE_POL_AAA‘; COMMIT; EXECUTE IMMEDIATE ‘DROP TABLE DB2USER.TEMP_S_CLM_RATE_POL_AAA‘; END IF ; SET V_LOCATION = ‘after 分区数据转出‘; --非正常DML或DDL 需要调用 sysproc.admin_cmd(); --收集统计信息 CALL SYSPROC.ADMIN_CMD(‘RUNSTATS ON TABLE db2user.S_CLM_RATE_POL_AAA_test‘); -- 添加新分区 EXECUTE IMMEDIATE ‘ALTER TABLE DB2USER.S_CLM_RATE_POL_AAA_test ADD PARTITION ‘||V_PARTITION_NAME||‘ STARTING ‘||SUBSTR(ETL_DATE,1,6)||‘ INCLUSIVE ENDING ‘||V_PARTITION_END||‘ exclusive‘; SET V_LOCATION = ‘after 添加新分区‘; COMMIT; EXECUTE IMMEDIATE ‘ALTER TABLE DB2USER.S_CLM_RATE_POL_AAA_test ACTIVATE NOT LOGGED INITIALLY‘; FOR REC AS WITH TMP(TYPE) AS (SELECT ‘AAA1‘ AS TYPE FROM SYSIBM.DUAL UNION ALL SELECT ‘AAA2‘ AS TYPE FROM SYSIBM.DUAL UNION ALL SELECT ‘AAA4‘ AS TYPE FROM SYSIBM.DUAL) SELECT * FROM TMP DO SET V_LOCATION = ‘test‘||REC.TYPE; INSERT INTO DB2USER.S_CLM_RATE_POL_AAA_test SELECT ......END FOR; CALL DB2USER.PRO_LOG(ETL_DATE,‘Tools_partition_table_show‘,‘测试分区表作业方式‘,V_START_TIME,current timestamp,‘SUCCESS‘,‘‘,‘‘); END;

3.总结：

a.db2 中表分区目前只支持range分区，没有oracle的丰富。

b.分区不能直接删除必须先 DETACH PARTITION ，detach之后必须commit不然会报结构不完善的错误。

c.需要添加新的分区只需要直接 ADD partition。

d.DDL语句用在procedure中需要显示commit。

 

DB2分区表删除和添加分区

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