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Daniel Kuppitz commented on TINKERPOP-1298:
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Because I'm sure that I will forget anything that I just learned about global
traversers, here's how {{BulkExportVertexProgram}} should approximately look
like in 3.3:
https://gist.github.com/dkuppitz/4ee35f89353978ac6d7428cbc71305d2
For now {{BulkExportVertexProgram}} supports exports for almost any traversal
that doesn't end with a reducing barrier step. In order to support the latter,
we depend on a solution for these 2 tickets:
* https://issues.apache.org/jira/browse/TINKERPOP-1309
* https://issues.apache.org/jira/browse/TINKERPOP-1306
It relies on {{ScriptOutputFormat}} to write a tabular / comma-separated /
clear-text output. A sample configuration and Groovy script for the
{{ScriptOutputFormat}} will be provided as part of the TinkerPop distribution.
I will add an integration test and a fully working example in the docs before I
create a PR.
> Save OLAP results to file
> -------------------------
>
> Key: TINKERPOP-1298
> URL: https://issues.apache.org/jira/browse/TINKERPOP-1298
> Project: TinkerPop
> Issue Type: Improvement
> Components: io, process
> Reporter: Daniel Kuppitz
> Assignee: Daniel Kuppitz
>
> Provide a way to save (tabular) results to text files, just like Spark's
> {{saveAsTextFile}}.
> I'm not sure about the best way to do it. 3 options come to my mind:
> # a new step.
> # a {{VertexProgram}}
> # a configuration option
> Things to consider / open questions:
> * Is it sufficient to simply {{toString()}} all values or should we allow
> formatters / format stings?
> * [~jlewandowski] pointed out that it would be nice to have support for the
> [parquet file format|https://parquet.apache.org/]. I guess now we're already
> talking about support for different {{FileOutputFormats}} and not just
> formatters.
> * Is that only relevant for OLAP?
> * Can we support arbitrary file systems?
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