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How to pass table column values to function

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Hi!

Table source contains integer column. Its values should be passed to function for selecting data from other table.

I tried

        CREATE OR REPLACE FUNCTION public.TestAddAssetTransactions(dokumnrs int[])
         RETURNS int AS
        $BODY$
        
        with i1 as (
        INSERT INTO bilkaib (dokumnr)
        select dokumnr  from dok where dokumnr in (select * from unnest(dokumnrs))
        returning *
        )
        
        select count(*) from i1;
        $BODY$ language sql;
        
        create temp table bilkaib (dokumnr int ) on commit drop;
        create temp table dok (dokumnr serial primary key ) on commit drop;
        create temp table source (dokumnr int ) on commit drop;
        insert into source values (1),(2);
    
    select TestAddAssetTransactions( (select ARRAY[dokumnr] from source)::int[] )

 
but got error

> ERROR: more than one row returned by a subquery used as an _expression_

How to pass set of integers to function? Should temp table with fixed name used or is there better solution?

Using Postgresql 12+

Andrus.


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