PG在函数中捕获异常

实例

CREATE or replace FUNCTION func_test() RETURNS int AS $$
declare
    x int=0;
    y int=0;
    text_var1 varchar;
    text_var2 varchar;
    text_var3 varchar;
BEGIN
    x := x + 1;
    y := x / 0;
EXCEPTION

    when others then
    GET STACKED DIAGNOSTICS text_var1 = MESSAGE_TEXT,
                          text_var2 = PG_EXCEPTION_DETAIL,
                          text_var3 = PG_EXCEPTION_HINT;
        raise notice 'text_var1=%',text_var1;
        raise notice 'text_var2=%',text_var2;
        raise notice 'text_var3=%',text_var3;
        RETURN x;
END;
$$ LANGUAGE plpgsql;

结果

postgres=# select * from func_test();
NOTICE:  text_var1=division by zero
NOTICE:  text_var2=
NOTICE:  text_var3=
 func_test 
-----------
         1
(1 row)