Hello impala devs! Let me say that I have used impala a lot and am very impressed with it.
I know impala is moving into the Apache incubator (I have an incubator prodling gossip so I know this is challenging). There are few things I want to bring to your attention/discuss, so that they do not become an issue or blocker in the future. 1) code Your proposal https://wiki.apache.org/incubator/ImpalaProposal lists hive as a dependency. External Dependencies Apache Hive (Apache Software License v2.0) I notice that the cloudera impala has CDH "hive" (which are rather old) jars in its source tree: https://github.com/cloudera/Impala/tree/8b621a301329d91fbe10a8aac5e39a2b14d6d25f/thirdparty/hive-1.1.0-cdh5.12.0-SNAPSHOT A quick search did not find any evidence of that in incubator-impala (which is good): https://github.com/apache/incubator-impala/ We (Hive) want people using only official Apache Hive releases for dependencies. We want to avoid: 1) Full or partial code forks of Apache Hive which still carry the Hive name 2) Artifacts published to central repositories named "*Hive*" which could be confusing I am not asserting that impala if affected by case #1 or #2 currently, but something to be aware of. If you need guidance feel free to discuss further with the Hive PMC. 2) Next topic, the Hive name and statements that imply compatibility: http://impala.apache.org/ For Apache Hive users, Impala utilizes the same metadata, ODBC driver, SQL syntax, and user interface as Hive—so you don't have to worry about re-inventing the implementation wheel. Apache Hive proposes and adds syntax all the time. For example, this feature is in the works now ( https://issues.apache.org/jira/browse/HIVE-15986). Even if every effort was made to keep the languages and features in sync no one would be able to make this claim. This because Apache Hive does not have compatibility tests for any of these things (We do not have anything like ANSI SQL 92). This text needs be replaced. It is probably fine to make statements such as "Impala can run many of queries as Apache Hive", or "users of Apache Hive will find many familiar features in Impala". Again welcome to the incubator, I am sure getting impala through is fun with the c++ ness of it all! Thanks, Edward
