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Re: Index trouble with 8.3b4

From: Gregory Stark <stark(at)enterprisedb(dot)com>
To: "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: "Hannes Dorbath" <light(at)theendofthetunnel(dot)de>, <pgsql-general(at)postgresql(dot)org>
Subject: Re: Index trouble with 8.3b4
Date: 2008-01-07 14:46:19
Message-ID: 877iil7kxw.fsf@oxford.xeocode.com (view raw or flat)
Thread:
Lists: pgsql-generalpgsql-hackers
"Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:

> Hannes Dorbath <light(at)theendofthetunnel(dot)de> writes:
>> hannes=> CREATE INDEX CONCURRENTLY "ts_fts_tsv" ON "public"."fts" USING gin ("tsv");
>> ERROR: item pointer (0,1) alreadt exists
>
>> I was able to reproduce that error a few times, but not always. It seems 
>>   it only happens with CONCURRENTLY.
>...
> I didn't have any luck reproducing either of these behaviors --- maybe
> it's data-dependent.  Can you extract a test case?

I the GIN problem kicks in with the "posting tree" representation. That would
require more than about 85 records with the same matching lexeme-key.

-- 
  Gregory Stark
  EnterpriseDB          http://www.enterprisedb.com
  Get trained by Bruce Momjian - ask me about EnterpriseDB's PostgreSQL training!

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