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Function Properties
Language: PLPGSQL
Return Type: text
Return a string consisting of what should be appended to a COPY statement to specify fields for the passed-in tab_id. In PG versions > 7.3, this looks like (field1,field2,...fieldn)declare
result text;
prefix text;
prec record;
begin
result := '';
prefix := '('; -- Initially, prefix is the opening paren
for prec in select slon_quote_input(a.attname) as column from sl_table t, pg_catalog.pg_attribute a where t.tab_id = p_tab_id and t.tab_reloid = a.attrelid and a.attnum > 0 and a.attisdropped = false order by attnum
loop
result := result || prefix || prec.column;
prefix := ','; -- Subsequently, prepend columns with commas
end loop;
result := result || ')';
return result;
end;