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# Red Arrow Flight SQL - Apache Arrow Flight SQL Ruby
Red Arrow Flight SQL is the Ruby bindings of Apache Arrow Flight SQL. Red Arrow Flight SQL is based on GObject Introspection.
[Apache Arrow Flight SQL](https://arrow.apache.org/docs/format/FlightSql.html) is one of Apache Arrow components to interact with SQL databases using the Apache Arrow in-memory format and [Apache Arrow Flight](https://arrow.apache.org/docs/format/Flight.html).
[GObject Introspection](https://wiki.gnome.org/action/show/Projects/GObjectIntrospection) is a middleware for language bindings of C library. GObject Introspection can generate language bindings automatically at runtime.
Red Arrow Flight SQL uses [Apache Arrow Flight SQL GLib](https://github.com/apache/arrow/tree/main/c_glib/arrow-flight-sql) and [gobject-introspection gem](https://rubygems.org/gems/gobject-introspection) to generate Ruby bindings of Apache Arrow Flight SQL.
Apache Arrow Flight SQL GLib is a C wrapper for [Apache Arrow Flight SQL C++](https://github.com/apache/arrow/tree/main/cpp/src/arrow/flight/sql). GObject Introspection can't use Apache Arrow Flight SQL C++ directly. Apache Arrow Flight SQL GLib is a bridge between Apache Arrow Flight SQL C++ and GObject Introspection.
gobject-introspection gem is a Ruby bindings of GObject Introspection. Red Arrow Flight SQL uses GObject Introspection via gobject-introspection gem.
## Install
Install Apache Arrow Flight SQL GLib before install Red Arrow Flight SQL. See [Apache Arrow install document](https://arrow.apache.org/install/) for details.
Install Red Arrow Flight SQL after you install Apache Arrow Flight GLib:
```console
$ gem install red-arrow-flight-sql
```
## Usage
```ruby
require "arrow-flight-sql"
# TODO
```
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