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https://issues.apache.org/jira/browse/TINKERPOP-1795?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16188875#comment-16188875
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ASF GitHub Bot commented on TINKERPOP-1795:
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GitHub user okram opened a pull request:
https://github.com/apache/tinkerpop/pull/726
TINKERPOP-1795: Getting Lambda comparator message for .profile() step
https://issues.apache.org/jira/browse/TINKERPOP-1795
Some objects are hard to check for "lambdaness" and require a `toString()`
analysis. We checked for `@` but that doesn't work for named steps within
`order()` (when using `profile()`). That is, its error prone. I came up with a
new way to check for lambdas that works for Java, Groovy, and Python/Jython.
@spmallette -- can you please verify that a "toString()" of a lambda in C#
will hold as well for the pattern.
VOTE +1
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/apache/tinkerpop TINKERPOP-1795
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/tinkerpop/pull/726.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #726
----
commit beae74c43505d1f7732f92a500dc58fc4b142af1
Author: Marko A. Rodriguez <[email protected]>
Date: 2017-10-02T21:23:33Z
fixed a bug in LambdaRestrictionStrategy where named @ steps were
considered lambda. Came up with a different way to check lambdas in
.toString(). Works for Groovy, Java, and Python.
----
> Getting Lambda comparator message for .profile() step
> ------------------------------------------------------
>
> Key: TINKERPOP-1795
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1795
> Project: TinkerPop
> Issue Type: Bug
> Components: process
> Affects Versions: 3.2.6
> Reporter: Shaunak Das
> Assignee: Marko A. Rodriguez
> Priority: Minor
>
> Ran into this message when adding a .profile() step, even though Gremlin
> query does not have any lambda steps:
> {code}
> gremlin>
> g.V().has("Question","questionType","yes/no").in("has_question").order().by(inE("reviewed").values("rating").mean()).profile()
> The provided step contains a lambda comparator:
> OrderGlobalStep([[[VertexStep(IN,[reviewed],edge),
> PropertiesStep([rating],value), MeanGlobalStep@[~gremlin.profile]], incr]])
> Type ':help' or ':h' for help.
> Display stack trace? [yN]
> {code}
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