db2 delete 大表不寫日誌方法

最近由於專案需要，用

shell

程式批量刪除業務表資料，但還需要按業務需求保留業務歷史資料，由於專案中用的是

db2,db2

在刪除資料時會產生大量的日誌，會把日誌檔案充滿，會報

57011錯誤.

通過在網上查詢一些資料，最終在不改變原表結構引數的基礎上，減少其他們人員的工作量的基礎上動態調整引數。

以下為具體操作步驟：

-- db2 delete

大表不寫日誌操作

1.update command options using c off -- //

關閉自動提交

2.alter table marpt.rpt_dim_u_org_inx_m_curr_cus_pro_tbk activate not logged initially //

設定不記日誌

3.delete from marpt.rpt_dim_u_org_inx_m_curr_cus_pro_tbk --

刪除資料

4.commit//

手動提交

5.update command options using c on//

開啟自動提交

相關操作說明;

1.alter table testdeletetab activate not logged initially

，設定表操作不記日誌，這條命令只在乙個事務裡有效，遇到

commit

之後就失效了，這個很需要關注，因為有的時候我們的連線都是設定的自動提交，所以雖然設定了不記日誌，但是並沒有起到作用。 2.

可以通過相關的命令檢視當前命令引數

db2 list command options

下邊為相應的shell指令碼，可以參照一下

. /home/odsuser1/.profile

#ods run all gdbma jobs

#gdbma

#2011-3-16

#刪除表引數

work_date=$2

tab_name=$1

#sysname=gdbma

if [ "$tab_name#" -eq "#" ]

then

echo "the job do not delete the table data!! "

else

mads_home=/home/odsuser1/gdbma/etl

#ds config

dsconfigfile=$mads_home/dsconfig_gdbma

#marpt etl2資料庫

#dbdbname=`awk 'fs="=" ' $dsconfigfile`

dbusr=`awk 'fs="=" ' $dsconfigfile`

dbpwd=`awk 'fs="=" ' $dsconfigfile`

dbschema=`awk 'fs="=" ' $dsconfigfile`

dbpwd=`$mads_home/encrypt/discrypt.sh $dbpwd`

dbname=$dbname

user=$dbusr

passwd=$dbpwd

#連線資料庫

db2 connect to $dbname user $dbusr using $dbpwd >/dev/null

db2 set schema=$dbschema;

ssql="select schedule,keep_date,sch_name,tab_date,no_log from "$dbschema".s_tab_info where tab_name='"$tab_name"' "

sdata=`db2 -t "$ssql"`

if [ $? -eq 0 ]

then

echo " the job drop data start!"

else

echo "this query false!!!"

fiecho "$sdata" | sed -e '4,/^$/!d;/^$/d'|

#迴圈讀取job，然後排程

while read schedule keep_date sch_name tab_date no_log

doecho "$no_log"

if [ "$no_log" = 'y' ]

then

#引數調整(取消自動提交）

commit_off=`db2 -a "update command options using c off"`

#啟用不寫日誌

log_off=`db2 -a "alter table "$dbschema"."$tab_name" activate not logged initially"`

# 清資料開始

if [ "$schedule" = 'm' ]

then

if [ "$keep_date" = 1 ]

then

delete_table="delete from "$dbschema"."$tab_name" "

else

v_tx_date=`db2 -x "select date(substr(varchar(date('"$work_date"')),1,8)||'01') -(int(trim('"$keep_date"'))-2) months -1 days from sysibm.sysdummy1 "`

echo "$v_tx_date"

delete_table="delete from "$dbschema"."$tab_name" where date("$tab_date") = date('"$v_tx_date"')"

fifi

if [ "$schedule" = 'd' ]

then

if [ "$keep_date" = 1 ]

then

delete_table="delete from "$dbschema"."$tab_name" "

else

v_tx_date=`db2 -x "select date('"$work_date"') -(int(trim('"$keep_date"'))*31) days from sysibm.sysdummy1 "`

delete_table="delete from "$dbschema"."$tab_name" where date("$tab_date") = date('"$v_tx_date"')"

fifi

deldata=`db2 -a $delete_table`

echo "$deldata" | sed -n -e 's/^.*sqlcode: /([-,0-9][0-9]*/).*//1/p' | read sqlcode

if [ $sqlcode -ge 0 ]

then

echo "the job delete table sucessfull"

else

echo "the job delete table false"

fi#提交

commit_date=`db2 -a "commit"`

#設定自動提交

commit_on=`db2 -a "update command options using c off"`

else

if [ "$schedule" = 'm' ]

then

if [ "$keep_date" = 1 ]

then

delete_table="delete from "$dbschema"."$tab_name" "

else

v_tx_date=`db2 -x "select ( date(substr(varchar(date('"$work_date"')),1,8)||'01') -(int(trim('"$keep_date"'))-2) months -1 days) from sysibm.sysdummy1"`

delete_table="delete from "$dbschema"."$tab_name" where date("$tab_date") = date('"$v_tx_date"')"

fifi

if [ "$schedule" = 'd' ]

then

if [ "$keep_date" = 1 ]

then

delete_table="delete from "$dbschema"."$tab_name" "

else

v_tx_date=`db2 -x "select date('"$work_date"') -(int(trim('"$keep_date"'))*31) days from sysibm.sysdummy1 "`

delete_table="delete from "$dbschema"."$tab_name" where date("$tab_date") = date('"$v_tx_date"')"

fifi

deldata=`db2 -a $delete_table`

echo "$deldata" | sed -n -e 's/^.*sqlcode: /([-,0-9][0-9]*/).*//1/p' | read sqlcode

if [ $sqlcode -ge 0 ]

then

echo "the job delete table sucessfull"

else

echo "the job delete table false"

fifi

done

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