[jira] [Created] (ARROW-13119) [R] Set empty schema in scalar Expressions

["Ian Cook (Jira)" <ji...@apache.org>]

Ian Cook created ARROW-13119:
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             Summary: [R] Set empty schema in scalar Expressions
                 Key: ARROW-13119
                 URL: https://issues.apache.org/jira/browse/ARROW-13119
             Project: Apache Arrow
          Issue Type: Improvement
          Components: R
            Reporter: Ian Cook
            Assignee: Ian Cook
             Fix For: 5.0.0


Closely related to ARROW-13117 is the problem of {{type()}} and {{type_id()}} not working for scalar expressions. For example, currently this happens:

{code:r}> Expression$scalar("foo")$type()
 Error: !is.null(schema) is not TRUE

> Expression$scalar(42L)$type()
 Error: !is.null(schema) is not TRUE{code}

This is what we want to happen:
{code:r}> Expression$scalar("foo")$type()
Utf8
string

> Expression$scalar(42L)$type()
Int32
int32{code}
This is simple to solve; we just need to set {{schema}} to an empty schema for all scalar expressions.



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