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Bucket and batch

From: "Ana Carolina Brito de Almeida" <anacrl(at)ig(dot)com(dot)br>
To: pgsql-hackers(at)postgresql(dot)org
Subject: Bucket and batch
Date: 2008-06-30 19:12:11
Message-ID: 27c6eb60806301212ob497761tcd7b72333d36b4ae@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-hackers
Hi!

I saw that functions which use hash join, like as ExecHashGetBucketAndBatch
and ExecScanHashBucket, have bucket and batch concepts.
So, I would like to know the differences between bucket and batch.
I dont understand tables partitioning mechanism in hash join.


Thanks,
Ana Carolina

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