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Posted to issues@arrow.apache.org by "Anders Rune Jensen (Jira)" <ji...@apache.org> on 2020/04/18 21:05:00 UTC
[jira] [Updated] (ARROW-7738) [JS] Implement list contains
predicate
[ https://issues.apache.org/jira/browse/ARROW-7738?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Anders Rune Jensen updated ARROW-7738:
--------------------------------------
Description:
As far as I can see there is no way to check if a list contains a specific element.
My code is as follows:
{code:java}
var listChild = new arrow.Field('list[Utf8]', new arrow.Utf8())
var all = arrow.Table.new([
arrow.DateVector.from(dates),
arrow.Int32Vector.from(flumeseqs),
arrow.Utf8Vector.from(keys),
arrow.Vector.from({ values: authors, type: new arrow.Dictionary(new arrow.Utf8(), new arrow.Int32()) }),
arrow.Int32Vector.from(sequences),
arrow.Vector.from({ values: types, type: new arrow.Dictionary(new arrow.Utf8(), new arrow.Int32()) }),
arrow.Vector.from({ values: links, type: new arrow.List(listChild) }),
], ["date", "flumeseq", "key", "author", "sequence", "type", "links"])
{code}
And I want to get all the items that has a specific element in the links section.
So something like:
{code:java}
var q2 = Array.from(
all.filter(
arrow.predicate.col('links').contains('%GcvjVk+NLsjOB5Vd+vceGXEOeYmHoRA6lgXVJzPuMxw=.sha256')))
{code}
was:
As far as I can see there is no way to check if a list contains a specific element.
My code is as follows:
{code:java}
var all = arrow.Table.new([
arrow.DateVector.from(dates),
arrow.Int32Vector.from(flumeseqs),
arrow.Utf8Vector.from(keys),
arrow.Vector.from({ values: authors, type: new arrow.Dictionary(new arrow.Utf8(), new arrow.Int32()) }),
arrow.Int32Vector.from(sequences),
arrow.Vector.from({ values: types, type: new arrow.Dictionary(new arrow.Utf8(), new arrow.Int32()) }),
arrow.Vector.from({ values: links, type: new arrow.List(listChild) }),
], ["date", "flumeseq", "key", "author", "sequence", "type", "links"])
{code}
And I want to get all the items that has a specific element in the links section.
So something like:
{code:java}
var q2 = Array.from(
all.filter(
arrow.predicate.col('links').contains('%GcvjVk+NLsjOB5Vd+vceGXEOeYmHoRA6lgXVJzPuMxw=.sha256')))
{code}
> [JS] Implement list contains predicate
> --------------------------------------
>
> Key: ARROW-7738
> URL: https://issues.apache.org/jira/browse/ARROW-7738
> Project: Apache Arrow
> Issue Type: Improvement
> Components: JavaScript
> Affects Versions: 0.15.1
> Reporter: Anders Rune Jensen
> Priority: Minor
>
> As far as I can see there is no way to check if a list contains a specific element.
> My code is as follows:
>
> {code:java}
> var listChild = new arrow.Field('list[Utf8]', new arrow.Utf8())
> var all = arrow.Table.new([
> arrow.DateVector.from(dates),
> arrow.Int32Vector.from(flumeseqs),
> arrow.Utf8Vector.from(keys),
> arrow.Vector.from({ values: authors, type: new arrow.Dictionary(new arrow.Utf8(), new arrow.Int32()) }),
> arrow.Int32Vector.from(sequences),
> arrow.Vector.from({ values: types, type: new arrow.Dictionary(new arrow.Utf8(), new arrow.Int32()) }),
> arrow.Vector.from({ values: links, type: new arrow.List(listChild) }),
> ], ["date", "flumeseq", "key", "author", "sequence", "type", "links"])
> {code}
> And I want to get all the items that has a specific element in the links section.
> So something like:
>
> {code:java}
> var q2 = Array.from(
> all.filter(
> arrow.predicate.col('links').contains('%GcvjVk+NLsjOB5Vd+vceGXEOeYmHoRA6lgXVJzPuMxw=.sha256')))
> {code}
>
>
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