| From: | Andrew Nesheret <andrew(at)infinet(dot)ru> |
|---|---|
| To: | Richard Huxton <dev(at)archonet(dot)com> |
| Cc: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: foreign key constraint, planner ignore index. |
| Date: | 2007-12-20 06:18:36 |
| Message-ID: | 476A093C.5010805@infinet.ru |
| Views: | Whole Thread | Raw Message | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-general |
Richard Huxton wrote:
> Andrew Nesheret wrote:
>> Richard Huxton wrote:
>>> If you PREPARE .... then EXECUTE the same query, does it still use
>>> the index?
Tested, comments?
--- code -----
--- result ---
Result for node #2007
Index Scan using fki_nodes on sf_ipv4traffic x (cost=0.00..9.65
rows=1 width=6) (actual time=0.060..0.060 rows=0 loops=1)
Index Cond: ($1 = node)
Total runtime: 0.131 ms
Result for node #156
Seq Scan on sf_ipv4traffic x (cost=0.00..360281.29 rows=15795383
width=6) (actual time=0.048..108939.142 rows=15795376 loops=1)
Filter: ($1 = node)
Total runtime: 365989.953 ms
----
UP(subject), we are go away from my problem, in case of integrity check
with foreign key.
--
__________________________________
WBR, Andrew Nesheret ICQ:10518066
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Andrew Nesheret | 2007-12-20 06:20:12 | Re: foreign key constraint, planner ignore index. |
| Previous Message | Tom Lane | 2007-12-20 05:55:02 | Re: Postgres 8.3 HOT and non-persistent xids |