flink-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From twalthr <...@git.apache.org>
Subject [GitHub] flink pull request: [FLINK-3498] Implement TRIM, SUBSTRING as refe...
Date Tue, 01 Mar 2016 17:32:30 GMT
Github user twalthr commented on the pull request:

    "quite a bit of code at various places": Yes, you are right. I already tried to simplify
it as much as I can. The problem is that we have 3 APIs that all have slightly different requirements.
I chose `TRIM` because it is an extreme example. Other functions (80%) are easier, because
they don't need their own code generator and ExpressionParser.
    My current implementation has a proper separation of the different layers:
    Expression API -> RexNodeTranslator -> CodeGen
    3 layers + 3 APIs = up to 6 files to change for every function.
    I don't know if it makes sense to mix the layers.

If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.

View raw message