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Re: foreign key constraint, planner ignore index.

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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.

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__________________________________
WBR, Andrew Nesheret ICQ:10518066


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TIP 6: explain analyze is your friend

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