Name	Name	Last commit message	Last commit date
parent directory ..
Gemfile	Gemfile
README.md	README.md
games.parquet	games.parquet
main.rb	main.rb

Name

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Connecting Ruby and Apache DataFusion with ADBC

Instructions

Install Ruby
Install dbc
Ensure the native Arrow GLib and ADBC GLib libraries required by red-adbc are installed and discoverable. If bundle install reports missing arrow, arrow-glib, or adbc-glib, use the platform-specific commands below.
macOS with Homebrew
```
brew install apache-arrow-glib apache-arrow-adbc-glib
```
Debian/Ubuntu
```
sudo apt install libarrow-glib-dev libadbc-glib-dev
```
RHEL-compatible distributions
```
sudo dnf install arrow-glib-devel adbc-glib-devel
```
Windows with RubyInstaller/MSYS2 UCRT64
```
pacman -S --needed mingw-w64-ucrt-x86_64-arrow mingw-w64-ucrt-x86_64-arrow-adbc-glib
```
If you use a different MSYS2 environment, adjust the package prefix to match it; for example, use mingw-w64-x86_64-* from the MINGW64 shell.
Install Ruby dependencies:
```
bundle install
```
If you have multiple Ruby installations, ensure ruby and bundle resolve to the same installation before running this command.

Install the DataFusion ADBC driver:
```
dbc install --level user datafusion
```
Customize the Ruby script main.rb as needed
- Change the SQL SELECT statement in connection.query(), or keep it set to SELECT * FROM 'games.parquet'; to query the Parquet file included with this example
- The SET statement disables DataFusion's Arrow StringView output for Parquet scans so that the results can be decoded and formatted by red-arrow; keep it as is
  - If you change the query to produce string columns another way (for example, casting to VARCHAR), you may also need to set datafusion.sql_parser.map_string_types_to_utf8view = false
Run the Ruby script:
```
bundle exec ruby main.rb
```