How to pass values from bat file to DB2 sql file using CLP

Question

I need to update Customer table in chunk of 50K, The number of records in customer table is 2 million.

I am using DB2 command prompt to execute my sql from a file using bat file.

There are two file which I have created.

1. customerupdate.bat

DB2 CONNECT TO DBTEST USER DB2ADMIN USING XXXXXX
set start=%1
set end=%2
db2 -l D:\vinu\CUSTOMERADDRESS.log  -mstf D:\vinu\CUSTOMERADDRESS.sql 

2. customer.sql

update customer set firstname='XXXX' where customercid between 1 and 50000

Here I need to pass 1 and 50000 value from command prompt .

update customer set firstname='XXXX' where customercid between 1 and 50000

I am executing above sql using below command successfully, However I need pass the parameter to sql file.

C:\\Program Files\\IBM\\SQLLIB\\BIN> customerupdate.bat 1 50000

Please note: I cannot use the query directly like

db2 -l D:\\vinu\\CUSTOMERADDRESS.log -mst " update customer set firstname='XXXX' where customercid between %1 and %2" The query should be supplied from a sql file only.

Answer 1

You cannot do that with the traditional CLP, but it's possible if you use CLPPlus.

In your customer.sql :

update customer set firstname='XXXX' where customercid between &1 and &2;
exit

Invoke CLPPlus (it connects using JDBC):

clpplus -nw db2admin/password@hostname:port/dbtest @customer.sql 1 50000

&1 and &2 will be substituted with the first and second command line arguments respectively.

Answer 2

Rather than putting all of your SQL in a separate SQL file, why not just include the statements in your batch file?

DB2 CONNECT TO DBTEST USER DB2ADMIN USING XXXXXX
set start=%1
set end=%2

set FIRSTNAME=Vinu

db2 -l D:\vinu\CUSTOMERADDRESS.LOG "update customer set firstname = 'XXXXX' where customercid between %start% and %end"

This will require a little more error checking (since you can't rely on the -s flag for the CLP to stop execution), but it will work.