Re: EXPLAIN WITH - Mailing list pgsql-hackers

From Tom Lane
Subject Re: EXPLAIN WITH
Date
Msg-id 4984.1238947528@sss.pgh.pa.us
Whole thread Raw
In response to Re: EXPLAIN WITH  (Stephen Frost <sfrost@snowman.net>)
Responses Re: EXPLAIN WITH  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-hackers
Stephen Frost <sfrost@snowman.net> writes:
> * Stephen Frost (sfrost@snowman.net) wrote:
>> Would be nice if there was a CTE ID or similar to link between
>> the pieces of the InitPlan and the CTE nodes.

> Erm, of course, the CTE *has* an ID already, since you name them.  Could
> we get that ID/name up into the piece of the InitPlan that is handling
> that CTE?

I'm not sure but will be glad to take a look.  Assuming it's not
unreasonably difficult, does anyone object to a format like this:
Nested Loop  (cost=1266.59..1001458.19 rows=35936310 width=52)  InitPlan    CTE abc      ->  Seq Scan on foo
(cost=0.00..34.25rows=647 width=12)            Filter: (id < 200)    CTE wumpus      ->  Seq Scan on tab1
(cost=0.00..27.70rows=1770 width=16)  ->  CTE Scan on abc x  (cost=0.00..35.40 rows=1770 width=16)  ->  Materialize
(cost=1204.64..1566.67rows=20303 width=36)        ->  Hash Join  (cost=42.05..1025.34 rows=20303 width=36)  ...
 
        regards, tom lane


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