Kieran Martin created ARROW-16768:
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Summary: Factor variables in R with missing values cause an error
for write_parquet
Key: ARROW-16768
URL: https://issues.apache.org/jira/browse/ARROW-16768
Project: Apache Arrow
Issue Type: Bug
Components: R
Affects Versions: 7.0.0
Reporter: Kieran Martin
If you try to write a data frame with a factor with a missing value to parquet,
you get the error: "Error: Invalid: Cannot insert dictionary values containing
nulls".
This seems likely due to how the metadata for factors is currently captured in
parquet files. Reprex follows:
library(arrow)
bad_data <- data.frame(A = factor(1, 2, NA))
write_parquet(bad_data, tempfile())
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