Re: How to assign variable in array value inside function proc.

In pure sql I would do:

ARRAY[col1, col2, col3]::type[]

To create an array using column references as inputs instead of literals.

Likewise, for a composite type:

(co1, col2, col3)::type

You will probably need to use those constructs as fragments in your pl/pgsql code to build up the array of composites from variables/columns as opposed to trying to write a text literal.

If you want to write a literal, though, you may find the format() function to be helpful (and a sight easier to read, and generally safer, than string concatenation, which would be your option of last resort.

David J.