romainfrancois commented on pull request #7524:
URL: https://github.com/apache/arrow/pull/7524#issuecomment-648848097


   Added support for record batches. 
   
   Toying with the idea of a print method for the metadata, to make it less 
opaque: 
   
   ``` r
   library(arrow)
   #> 
   #> Attaching package: 'arrow'
   #> The following object is masked from 'package:utils':
   #> 
   #>     timestamp
   
   Table$create(a = structure(1:2, foo = "bar"))$metadata
   #> $r
   #> [1] 
"A\n3\n262144\n197888\n5\nUTF-8\n531\n2\n254\n531\n1\n531\n1\n16\n1\n262153\n3\nbar\n1026\n1\n262153\n5\nnames\n16\n1\n262153\n3\nfoo\n254\n1026\n511\n16\n1\n262153\n1\na\n254\n1026\n511\n16\n2\n262153\n4\ndata\n262153\n7\ncolumns\n254\n"
   #> List of 2
   #>  $ data   : NULL
   #>  $ columns:List of 1
   #>   ..$ a:List of 1
   #>   .. ..$ foo: chr "bar"
   #> 
   #> attr(,"class")
   #> [1] "arrow:::metadata"
   record_batch(a = structure(1:2, foo = "bar"))$metadata
   #> $r
   #> [1] 
"A\n3\n262144\n197888\n5\nUTF-8\n531\n2\n254\n531\n1\n531\n1\n16\n1\n262153\n3\nbar\n1026\n1\n262153\n5\nnames\n16\n1\n262153\n3\nfoo\n254\n1026\n511\n16\n1\n262153\n1\na\n254\n1026\n511\n16\n2\n262153\n4\ndata\n262153\n7\ncolumns\n254\n"
   #> List of 2
   #>  $ data   : NULL
   #>  $ columns:List of 1
   #>   ..$ a:List of 1
   #>   .. ..$ foo: chr "bar"
   #> 
   #> attr(,"class")
   #> [1] "arrow:::metadata"
   ```
   
   <sup>Created on 2020-06-24 by the [reprex 
package](https://reprex.tidyverse.org) (v0.3.0.9001)</sup>


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