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https://issues.apache.org/jira/browse/CALCITE-5580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17702982#comment-17702982
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Julian Hyde commented on CALCITE-5580:
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[~tanclary], I reviewed your PR. I added some extra commits to support BINARY
and VARBINARY arguments; and also to make it work when you pass a string such
as '.' which has a different meaning as a regex. Please see
[julianhyde/5580-split|https://github.com/julianhyde/calcite/tree/5580-split].
> Add SPLIT function (enabled in BigQuery library)
> ------------------------------------------------
>
> Key: CALCITE-5580
> URL: https://issues.apache.org/jira/browse/CALCITE-5580
> Project: Calcite
> Issue Type: Improvement
> Reporter: Tanner Clary
> Assignee: Tanner Clary
> Priority: Major
> Labels: pull-request-available
> Time Spent: 50m
> Remaining Estimate: 0h
>
> BigQuery offers the {{SPLIT()}} function which splits a string at an
> optionally-specified delimiter into a string array. If no delimiter is
> specified, it is default to a comma. If the string is empty, an array of a
> single empty string is returned. If the delimiter is not found in the string,
> an array with a single element (the string) is returned.
> In BigQuery, the function can also accept bytes. In order to implement this,
> I think some modifications to ByteString.java may be required. I will
> probably not do this at least for my initial draft. If anyone has any
> suggestions or guidance on whether or not it should be supported, I would
> appreciate it.
> Documentation and example cases may be found below.
> EXAMPLE: {{SPLIT('h,e,l,l,o')}} would return: {{[h, e, l, l, o]}}.
> EXAMPLE: {{SPLIT('h-e-l-l-o', '-')}} would return: {{[h, e, l, l, o]}}.
> [BigQuery
> docs|https://cloud.google.com/bigquery/docs/reference/standard-sql/string_functions#split]
>
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