Taras Bobrovytsky has posted comments on this change. Change subject: IMPALA-5036: Parquet count star optimization ......................................................................
Patch Set 5: (3 comments) http://gerrit.cloudera.org:8080/#/c/6812/5/fe/src/main/java/org/apache/impala/catalog/BuiltinsDb.java File fe/src/main/java/org/apache/impala/catalog/BuiltinsDb.java: Line 886: prefix + "8InitZeroIN10impala_udf9BigIntValEEEvPNS2_15FunctionContextEPT_", > Taras, I think the rewrite solution becomes more viable if we follow the ap After discussing it elsewhere we decided that it's better to keep the builtin because it's more obvious that it's correct and easier to reason about and requires substituting only 1 function instead of 2. http://gerrit.cloudera.org:8080/#/c/6812/5/fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java File fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java: Line 109: * > Yup, that's the comment I was looking for. I'm fine with its current locati Done PS5, Line 140: This : // scan does additional analysis in init() to determine whether it is correct to apply : // the optimization. > I think this approach will work out. We can use Analyzer.tableRefMap_ to de Done -- To view, visit http://gerrit.cloudera.org:8080/6812 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings Gerrit-MessageType: comment Gerrit-Change-Id: I536b85c014821296aed68a0c68faadae96005e62 Gerrit-PatchSet: 5 Gerrit-Project: Impala-ASF Gerrit-Branch: master Gerrit-Owner: Taras Bobrovytsky <tbobrovyt...@cloudera.com> Gerrit-Reviewer: Alex Behm <alex.b...@cloudera.com> Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com> Gerrit-Reviewer: Lars Volker <l...@cloudera.com> Gerrit-Reviewer: Marcel Kornacker <mar...@cloudera.com> Gerrit-Reviewer: Mostafa Mokhtar <mmokh...@cloudera.com> Gerrit-Reviewer: Taras Bobrovytsky <tbobrovyt...@cloudera.com> Gerrit-Reviewer: Zach Amsden <zams...@cloudera.com> Gerrit-HasComments: Yes
