Rounding Problems?

Hi,
  I have this pl function:
CREATE OR REPLACE FUNCTION ceilDecimal(num float) RETURNS float AS
$BODY$
BEGIN
    RETURN CEIL(num * 100) / 100;
END
$BODY$
LANGUAGE 'plpgsql';

  It is supposed to do a "decimail ceil" for 2 decimal places.
  But when I do "SELECT ceilDecimal(0.07)"
It will return
 ceildecimal
-------------
        0.08

  For other numbers the result is as expected:
SELECT ceilDecimal(0.17);
 ceildecimal
-------------
        0.17

WHY? rsrsr

Thanks in advance!



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