Taras Bobrovytsky has posted comments on this change. ( http://gerrit.cloudera.org:8080/8774 )
Change subject: IMPALA-5014: Part 1: Round when casting string to decimal ...................................................................... Patch Set 2: (1 comment) http://gerrit.cloudera.org:8080/#/c/8774/2/be/src/util/string-parser.h File be/src/util/string-parser.h: http://gerrit.cloudera.org:8080/#/c/8774/2/be/src/util/string-parser.h@191 PS2, Line 191: } else if (UNLIKELY(round && total_digits_count == type_precision)) { > I just thought it would be simpler to just always save the first truncated Saving the truncated digit may be costly. The first_truncated_digit, along with the check on line 191 should be completely codegened away if round is false. This function is used in our scanners for parsing decimals in text files. I think it would be a waste to make the scanners slower by saving the first_truncated_digit needlessly. -- To view, visit http://gerrit.cloudera.org:8080/8774 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-MessageType: comment Gerrit-Change-Id: Icd8b92727fb384e6ff2d145e4aab7ae5d27db26d Gerrit-Change-Number: 8774 Gerrit-PatchSet: 2 Gerrit-Owner: Taras Bobrovytsky <tbobrovyt...@cloudera.com> Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com> Gerrit-Reviewer: Taras Bobrovytsky <tbobrovyt...@cloudera.com> Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com> Gerrit-Reviewer: Zach Amsden <zams...@cloudera.com> Gerrit-Comment-Date: Thu, 21 Dec 2017 21:05:59 +0000 Gerrit-HasComments: Yes
