Nice DPQ

Alternative to Devel's dpq(), with added linebreaks and indentation for readability.

Example of a nested query:

  $q_nested = db_select(..);
  ...
  $q = db_select(..);
  $q->leftJoin($q_nested, ...);
  ...
  nicedpq($q);

Result (in the message area):

SELECT
  nested.*,
  b.width AS width,
  b.height AS height
FROM
  bbb b
  LEFT OUTER JOIN (
    SELECT
      a.x AS x,
      a.y AS y,
      a.b_id AS b_id
    FROM
      aaa a
    WHERE
      (z = 5) AND
      (y > 2.2)
    GROUP BY
      a.b_id
  ) nested ON 
    nested.b_id = b.id
ORDER BY
  b.width ASC

Explanation:
Devel dpq() simply uses the SelectQuery::__toString() method.
nicedpq() has its own way to generate a more readable output.