Thread: PLPGSQL SETOF functions

1) If you declare a return type setof TABLENAME the resultset will contain rows with field definitions like the table.

2) To call the function from another plpgsql function use:

declare
    row record
begin
    for row in select * from dates_pkg.getbusinessdays(...) Loop
        ...process...
    end loop
...
end

see http://www.postgresql.org/docs/current/static/plpgsql-control-structures.html#PLPGSQL-RECORDS-ITERATING


On 06/28/2011 09:34 PM, David Greco wrote:

I am porting some Oracle code to PLPGSQL and am having a problem with functions that return SETOF datatype. In Oracle, the functions I'm porting return a TABLE of TYPE datatype, this TABLE being itself a named type. I am not aware of how to do this in PLPGSQL.

 

Consider a function with header:

                CREATE OR REPLACE FUNCTION dates_pkg.getbusinessdays(pstartdate timestamp with time zone, penddate timestamp with time zone) RETURNS SETOF timestamp with time zone AS

 

 

I can easily call this function in SQL like so:

                select * from dates_pkg.getbusinessdays( now(), now() + INTERVAL '7' day ) as business_day;

 

However, I can't figure out how to call this function from another plpgsql function. Any hints?

 

~Dave Greco

 

Please reply to the list in the future.

I don't believe you can do that.

Sim

On 06/29/2011 04:39 PM, David Greco wrote:

Thanks that works pretty well. Is it possible to fetch the all the return of dates_pkg.getbusinessdays() into a single variable at once? i.e. in Oracle I would do something like

 

CRATE table_type as TABLE of TYPE record_type;

 

declare

    allrows table_type;

BEGIN

    allrows := dates_pkg.getbusinessdays();

END;

 

And allrows would be a collection that I can iterate over at my leisure. I have to problem writing future code to just do a for loop over the select, but while migrating existing code I'd rather keep it as intact as possible.

 

 

 

 

 

 

 

1) If you declare a return type setof TABLENAME the resultset will contain rows with field definitions like the table.

2) To call the function from another plpgsql function use:

declare

    row record

begin

    for row in select * from dates_pkg.getbusinessdays(...) Loop

        ...process...

    end loop

...

end

see http://www.postgresql.org/docs/current/static/plpgsql-control-structures.html#PLPGSQL-RECORDS-ITERATING

On 06/28/2011 09:34 PM, David Greco wrote:

I am porting some Oracle code to PLPGSQL and am having a problem with functions that return SETOF datatype. In Oracle, the functions I'm porting return a TABLE of TYPE datatype, this TABLE being itself a named type. I am not aware of how to do this in PLPGSQL.

Consider a function with header:

CREATE OR REPLACE FUNCTION dates_pkg.getbusinessdays(pstartdate timestamp with time zone, penddate timestamp with time zone) RETURNS SETOF timestamp with time zone AS

I can easily call this function in SQL like so:

select * from dates_pkg.getbusinessdays( now(), now() + INTERVAL '7' day ) as business_day;

However, I can't figure out how to call this function from another plpgsql function. Any hints?

~Dave Greco