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From "Lars Volker (Code Review)" <>
Subject [Impala-ASF-CR] IMPALA-2328: Address additional comments
Date Thu, 02 Mar 2017 21:23:58 GMT
Lars Volker has posted comments on this change.

Change subject: IMPALA-2328: Address additional comments

Patch Set 4:


Thanks for the review, please see PS5.
File be/src/exec/

Line 494:     // Resolve the parquet column using schema_resolver_. This will perform either
> a short single line will suffice here (no need to say 'using schema_resolve

Line 505:       // during the scan, so any predicate would evaluate to false. Return early.
> '<col> is null' would evaluate to true, did you cover that?
Yes, comparisons with null literals are filtered in the Frontend. min/max are only set when
there are non-null values, so we don't consider statistics for "is null".

Line 512:       // In case there is a bug, we return an error, which will abort the query.
> sounds like this should also be a dcheck, no?
We abort in L515. I implemented it like this to re-use the error string for the status. Is
there an easier way?

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Gerrit-MessageType: comment
Gerrit-Change-Id: I54c205fad7afc4a0b0a7d0f654859de76db29a02
Gerrit-PatchSet: 4
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Lars Volker <>
Gerrit-Reviewer: Alex Behm <>
Gerrit-Reviewer: Lars Volker <>
Gerrit-Reviewer: Marcel Kornacker <>
Gerrit-Reviewer: Tim Armstrong <>
Gerrit-HasComments: Yes

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