Sutou Kouhei

Apache Arrow registered its formats to IANA: * https://www.iana.org/assignments/media-types/application/vnd.apache.arrow.file * https://www.iana.org/assignments/media-types/application/vnd.apache.arrow.stream Streaming format uses "application/vnd.apache.arrow.stream" for media type and ".arrows" for extension.

https://packit.dev/

If we use Docker, we'll be able to migrate other CI service from Travis CI.

It's for dumping only the specified columns in the target table. We can use the function that is used in `select` to parse `output_columns` value. (I forgot the function name.)

AppVeyor CI job sometimes failed with nonexistent test file

2

https://ci.appveyor.com/project/groonga/groonga/builds/26144163/job/ahorsc81b5d7398v#L6661 ```text C:/projects/groonga/test/command/grntest/lib/grntest/executors/base-executor.rb:50:in `execute': doesn't exist. (Grntest::NotExist) ``` Why? Test files are just cloned by `git`. Who delete it?

See also #1019.

We should not use `GRN_LOG_PATH` directly for Windows. We should use relative path from `grn_windows_base_dir()` on Windows. `groonga`, `grndb` and so on are broken on Windows. See the outputs of...

IV -> 4

```text table_create Terms TABLE_PAT_KEY ShortText \ --token_filters 'TokenFilterNFKC100("unify_kana", true), TokenFilterNFKC100("unify_kana", true)' ``` ```text [ [ [ -22, 0.0, 0.0 ], "[info][set][token-filters][Terms] must be token filters(option1, option2, ...), ... format: