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From Vladimir Sitnikov <>
Subject Re: ProjectMergeRule
Date Tue, 21 Jul 2015 18:55:56 GMT
I'm not sure if "field names for very top project" play any difference.

As far as I understand, the intention was to keep execution plan readable.

Julian, can you please highlight why are you thinking of merging
"project that merely renames"?

Does it block another optimization?
Does it expand search space much?

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