help

We used nullif('$value','') on inserts in mssql. We
moved to postgres but the nullif() function doesn't
match empty strings to each other to return null.

MS SQL2000 nullif('1','') would insert 1 as integer
even though wrapped in '' (aka string). Also
nullif('','') would evaluate NULL (both equal returns
NULL) and insert the "not a value" accordingly, not
return text 'NULL' instead of return NULL if '' == ''.
Postgresql will through an error since the defined
return type is text.

I would like to alter this function all together. How
could I find it to manipulate it?

We cannot always enter a value for a integer, text,
boolean, etc column.

Is there any other way to accomplish this in any
language? C? Python? PL/x? If so can you suggest where
we could learn how to do this or provide an example?

Please help.

Domo
Matthew

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