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

On Thursday, October 28, 2021, aditya desai <admad123(at)gmail(dot)com> wrote:
>
>
> How to assign variable values in v_message in Function 2 and pass to
> function 1. How can I do this? Instead of COLUMN1,OLDVALUE1,NEWVALUE1 it
> should take variables assigned.
>
>
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.