To combine columns in QS

[divstands]

I want to combine few columns, like, Strre name, Ext No, Colony into one single column. I am using the transformer stage for same and

If the input fileds are:
Street
ExtNo
Colony

and the output field is : AddressLine1

then i have put AddressLine1 derivation as : Street:ExtNo:Colony

Now for most of the times ExtNo is a NULL. And because of this all the records are being dropped off. There is no output hence out of the transformer stage.

Please mention if i am missing some property in the Transformer stage
or
Mention an alternative stage to do the above task.

[chulett]

I assume this will work here:

Street:NullToEmpty(ExtNo):Colony

Once you cat a null onto a string, the result is null no matter the other values, so you need to avoid doing that at all costs.

[divstands]

I assume this will work here:

Street:NullToEmpty(ExtNo):Colony

Once you cat a null onto a string, the result is null no matter the other values, so you need to avoid doing that at all costs. ...

Okay. In real, there are some 26 fields coming out of standardization stage which i am feeding to the Transformer. All these fields can be NULL if required. Hence, i guess i would need to put this rule to every field right?

[JRodriguez]

DivStands,

The transformer stage is fine ... just handle the nulls values. In this case you should be Ok using NullToEmpty function

Street:NullToEmpty(ExtNo):Colony

I want to combine few columns, like, Strre name, Ext No, Colony into one single column. I am using the transformer stage for same and

If the input fileds are:
Street
ExtNo
Colony

and the output field is : AddressLine1

then i have put AddressLine1 derivation as : Street:ExtNo:Colony

Now for most of the times ExtNo is a NULL. And because of this all the records are being dropped off. There is no output hence out of the transformer stage.

Please mention if i am missing some property in the Transformer stage
or
Mention an alternative stage to do the above task.

[chulett]

In other words - yes, use it for every field that could be null.

[divstands]

I assume this will work here:

Street:NullToEmpty(ExtNo):Colony

Once you cat a null onto a string, the result is null no matter the other values, so you need to avoid doing that at all costs. ...

yes it is working perfectly. Thanx a lot chulett!