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https://issues.apache.org/jira/browse/ARROW-12162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Neal Richardson closed ARROW-12162.
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Resolution: Information Provided
> [R] read_parquet returns Invalid UTF8 payload
> ---------------------------------------------
>
> Key: ARROW-12162
> URL: https://issues.apache.org/jira/browse/ARROW-12162
> Project: Apache Arrow
> Issue Type: Bug
> Components: R
> Affects Versions: 3.0.0
> Environment: Windows 10
> R 4.0.3
> arrow 3.0.0
> dbplyr 2.0.0
> dplyr 1.0.2
> Reporter: David Wales
> Priority: Major
> Attachments: bad_char.rds
>
>
> h2. EDIT:
> I've found a solution for my specific use case. If I add the argument
> `encoding="latin1"` to the `DBI::dbConnect` function, then everything works!
> This issue might still be valid for other cases where Parquet tries to save
> invalid data though. It would be nice to get an error on write, rather than
> on read!
> h2. Background
> I am using the R arrow library.
> I am reading from an SQL Server database with the `latin1` encoding using
> `dbplyr` and saving the output as a parquet file:
> {code:java}
> # Assume `con` is a previously established connection to the database created
> with DBI::dbConnect
> tbl(con, in_schema("dbo", "latin1_table")) %>%
> collect() %>%
> write_parquet("output.parquet")
> {code}
>
> However, when I try to read the file back, I get the error "Invalid UTF8
> payload":
> {code:java}
> > read_parquet("output.parquet")
> Error: Invalid: Invalid UTF8 payload
> {code}
>
> What I would really like is a way to tell arrow "This data is latin1 encoded.
> Please convert it to UTF-8 before you save it as a Parquet file".
> Or alternatively "This Parquet file contains latin1 encoded data".
> h2. Minimal Reproducible Example
> I have isolated this issue to a minimal reproducible example.
> If the database table contains the latin1 single quote character, then it
> will trigger the error.
> I have attached a `.rds` file which contains an example tibble.
> To reproduce, run the following:
> {code:java}
> readRDS(file.path(data_dir, "bad_char.rds")) %>%
> write_parquet(file.path(data_dir, "bad_char.parquet"))
> read_parquet(file.path(data_dir, "bad_char.parquet"))
> {code}
> h2. Possibly related issues
> https://issues.apache.org/jira/browse/ARROW-12007
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