Re: using a plpgsql function argument as a table column.

Hello,

Yes, you can :-)

Using a functional that returns a table, like in the following example:
http://www.postgresqltutorial.com/plpgsql-function-returns-a-table/

You will have to generate a dynamic sql statement for querying your table
with the accurate WHERE clause. Like in this example:
https://stackoverflow.com/questions/12780275/dynamic-sql-query-in-postgres

Hope this helps
Have a nice day
Thomas

Le mer. 29 août 2018 à 07:11, ss <ss(at)tuxclub(dot)org> a écrit :

> I have a table with many years as columns. y1976, y2077, .. ,
> y2019,y2020 I want to dynamically return a column from a function.
>
>
> select * from FUNCTION('y2016') .....
>
> select t1.cola t1.colb, t1.colc, t2.y2016 from ..... Where t2.y2016 != 0;
>
> or if I select year y2012 I want FUNCTION('y2012')
>
> select t1.cola t1.colb, t1.colc, t2.y2012 from ..... Where t2.y2012 != 0;
>
>
> to generalize
>
> select * from FUNCTION( year_column )
>
> select t1.cola t1.colb, t1.colc, t2.year_column from ..... Where
> t2.year_column != 0;
>
> is it possible? if so how?
>
>
>