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How to load data for newly added column in a dimension table?

ErrendousMay 31 2022

I'm currently working on ODI 12C and attending interviews. I get the below question asked very often. can someone help me answer this?
How do you load history data for newly added column in a dimension table ?
One way is to simply write an update statement but is there a way to do this via ODI without having to truncate the target table? what's the ideal way to do this?

Comments

top.gun

OMG - where do I start!

If you are using Oracle for commercial purposes then you or your client needs a licence from Oracle. So really you should stop now.

Once you have your licence from Oracle, you can do a simulated import (ie show metadata) like this:

imp ar/live show=y statistics=none buffer=100000 feedback=100000 log=/gers/live/tmp/CUST_190312.log file=/gers/live/tmp/CUST_190312.dmp

Then if the above works you can do the real import (ie metadata and data) like this:

imp ar/live full=y statistics=none buffer=100000 feedback=100000 log=/gers/live/tmp/CUST_190312.log file=/gers/live/tmp/CUST_190312.dmp

Dean Gagne-Oracle

You can always use

imp help=y

to give you the available commands and options.  If you only want the data, then you can use:

imp user/password file=your_file.dmp rows=y

Hope this helps.

Dean

Lisa-Oracle

Hi AJVinkles,

You need to add ignore=y since the table pre-exists

Using IGNORE=y instructs Oracle to ignore any creation errors during the import

and permit the import to complete.

imp user/password file=  log= FROMUSER= TABLES=  ignore=y

rows=y as stated above is the default so it is not needed in the command

Regards,

Lisa

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Added on May 31 2022
#data-warehouse-reference-architectures-patterns, #odi
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