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From "Dan Hecht (Code Review)" <>
Subject [Impala-ASF-CR] IMPALA-5085: large rows in BufferedTupleStreamV2
Date Tue, 09 May 2017 22:08:23 GMT
Dan Hecht has posted comments on this change.

Change subject: IMPALA-5085: large rows in BufferedTupleStreamV2

Patch Set 3:

Commit Message:

PS3, Line 16: buffers
buffer bytes? bytes of reservation?

PS3, Line 16: 14
why is that not 15 (15 pages for writing to the partitions that aren't the large row)?
File be/src/runtime/buffered-tuple-stream-v2.h:

PS3, Line 95: other
aren't there n-1 other streams?

PS3, Line 212: max_page_len
how will that be determined?

PS3, Line 254: stream could not increase the reservation
             :   ///   sufficiently
does it try this for large rows, or not? above it says the caller must have reservation available.

PS3, Line 280: const WriteRowFn& write_fn
why is this part exposed outside BTS2? i thought this was just to reuse code internally. or
is the intention to get rid of AddRow() (but then why is the decl above still there)?

Line 466:   /// hard limit on the maximum size of row that can be stored in the stream.
motivation for this limit?

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Gerrit-MessageType: comment
Gerrit-Change-Id: I2861c58efa7bc1aeaa5b7e2f043c97cb3985c8f5
Gerrit-PatchSet: 3
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <>
Gerrit-Reviewer: Dan Hecht <>
Gerrit-Reviewer: Jim Apple <>
Gerrit-Reviewer: Tim Armstrong <>
Gerrit-HasComments: Yes

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