On 03/11/2013 06:56 PM, Tom Lane wrote:
And that means that you get the inefficient plan wherein the
foo-to-tiny_foo join is computed in its entirety.
:(
That's unfortunate, though I guess it makes sense. I moved the join in
the view into the SELECT clause as an EXISTS, and that seems to wor
Shaun Thomas writes:
> A developer was complaining about a view he created to abstract an added
> column in a left join. ...
> Curious, I whipped up this test case:
> CREATE VIEW v_slow_view AS
> SELECT foo.*, tf.small_label IS NOT NULL AS has_small_label
>FROM foo
>LEFT JOIN tiny_foo tf
Hey everyone!
A developer was complaining about a view he created to abstract an added
column in a left join. He was contemplating denormalizing the added
value into the parent table and using a trigger to maintain it instead,
and I obviously looked into the problem. I noticed the view was
in
