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Fix contrib/bloom to not fail under CLOBBER_CACHE_ALWAYS.

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The code was supposing that rd_amcache wouldn't disappear from under it
during a scan; which is wrong.  Copy the data out of the relcache rather
than trying to reference it there.
This commit is contained in:
Tom Lane
2016-04-03 15:16:07 -04:00
parent a9284849b4
commit 8f75fd1f40
3 changed files with 8 additions and 9 deletions
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8
contrib/bloom/blutils.c
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@ -155,9 +155,9 @@ initBloomState(BloomState *state, Relation index)
index->rd_amcache = (void *) opts;
}
state->opts = (BloomOptions *) index->rd_amcache;
memcpy(&state->opts, index->rd_amcache, sizeof(state->opts));
state->sizeOfBloomTuple = BLOOMTUPLEHDRSZ +
sizeof(SignType) * state->opts->bloomLength;
sizeof(SignType) * state->opts.bloomLength;
}
/*
@ -228,10 +228,10 @@ signValue(BloomState *state, SignType *sign, Datum value, int attno)
hashVal = DatumGetInt32(FunctionCall1(&state->hashFn[attno], value));
mySrand(hashVal ^ myRand());
for (j = 0; j < state->opts->bitSize[attno]; j++)
for (j = 0; j < state->opts.bitSize[attno]; j++)
{
/* prevent mutiple evaluation */
nBit = myRand() % (state->opts->bloomLength * BITSIGNTYPE);
nBit = myRand() % (state->opts.bloomLength * BITSIGNTYPE);
SETBIT(sign, nBit);
}
}