Check a whole table for a single value

Question

Background: I\'m converting a database table to a format that doesn\'t support null values. I want to replace the null values with an arbitrary number so my ap

Answer 1

create or replace function test_values( real ) returns setof record as
$$
declare
query text;
output record;
begin
for query in select 'select distinct ''' || table_name || '''::text table_name, ''' || column_name || '''::text column_name from '|| quote_ident(table_name)||' where ' || quote_ident(column_name) || ' = ''' || $1::text  ||'''::' || data_type  from information_schema.columns where table_schema='public'   and numeric_precision is not null
loop
    raise notice '%1 qqqq', query;
    execute query::text into output;
    return next output;
end loop;
return;
end;$$ language plpgsql;

select distinct * from test_values( 999999 ) as t(table_name text ,column_name text)