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Message Posted: Tue, 28 Oct 2003 @ 12:10:01 GMT

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I have a related question:

I have the following step from an explain output.

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We do an all-AMPs JOIN step from CHK.B by way of a RowHash match scan with no residual conditions, which is joined to CHK.A by way of a RowHash match scan with no residual conditions. CHK.B and CHK.A are joined using a merge join, with a join condition of ("CHK.A.a = CHK.B.a")

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Here there two places where a "join" is mentioned - "all-AMPs JOIN step" and "merge join". What is happening in the first case and what is happening in the second case?

Narayan

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