diff --git a/.github/workflows/mariadb.yml b/.github/workflows/mariadb.yml
index 565bda7e..d0cd2fa6 100644
--- a/.github/workflows/mariadb.yml
+++ b/.github/workflows/mariadb.yml
@@ -26,7 +26,7 @@ jobs:
           --health-timeout 5s
           --health-retries 5
     env:
-      BUNDLE_WITHOUT: "db2 oracle sqlserver sqlite postgresql"
+      BUNDLE_WITHOUT: "db2 oracle sqlserver sqlite postgresql trilogy"
       BUNDLE_JOBS: 4
       BUNDLE_PATH: vendor/bundle
     steps:
diff --git a/.github/workflows/mysql.yml b/.github/workflows/mysql.yml
index ccc58418..9e701f42 100644
--- a/.github/workflows/mysql.yml
+++ b/.github/workflows/mysql.yml
@@ -26,7 +26,7 @@ jobs:
           --health-timeout 5s
           --health-retries 5
     env:
-      BUNDLE_WITHOUT: "db2 oracle sqlserver sqlite postgresql"
+      BUNDLE_WITHOUT: "db2 oracle sqlserver sqlite postgresql trilogy"
       BUNDLE_JOBS: 4
       BUNDLE_PATH: vendor/bundle
     steps:
diff --git a/.github/workflows/postgresql.yml b/.github/workflows/postgresql.yml
index a1261dd8..90b963ff 100644
--- a/.github/workflows/postgresql.yml
+++ b/.github/workflows/postgresql.yml
@@ -24,7 +24,7 @@ jobs:
           --health-timeout 5s
           --health-retries 5
     env:
-      BUNDLE_WITHOUT: "db2 oracle sqlserver mysql splite"
+      BUNDLE_WITHOUT: "db2 oracle sqlserver mysql sqlite trilogy"
       BUNDLE_JOBS: 4
       BUNDLE_PATH: vendor/bundle
     steps:
diff --git a/.github/workflows/sqlite.yml b/.github/workflows/sqlite.yml
index bc02ad3e..24a39e8c 100644
--- a/.github/workflows/sqlite.yml
+++ b/.github/workflows/sqlite.yml
@@ -11,7 +11,7 @@ jobs:
         ruby: [2.7, "3.0", 3.1, 3.2]
     runs-on: ${{matrix.os}}
     env:
-      BUNDLE_WITHOUT: "db2 oracle sqlserver postgresql mysql"
+      BUNDLE_WITHOUT: "db2 oracle sqlserver postgresql mysql trilogy"
       BUNDLE_JOBS: 4
       BUNDLE_PATH: vendor/bundle
     steps:
diff --git a/Gemfile b/Gemfile
index ac1ab013..327980df 100644
--- a/Gemfile
+++ b/Gemfile
@@ -28,6 +28,11 @@ group :sqlserver do
   gem 'activerecord-sqlserver-adapter'
 end
 
+group :trilogy do
+  gem 'trilogy'
+  gem 'activerecord-trilogy-adapter'
+end
+
 group :test do
   gem 'minitest'
 end
diff --git a/Rakefile b/Rakefile
index 93fdb0b4..177a314f 100644
--- a/Rakefile
+++ b/Rakefile
@@ -23,7 +23,7 @@ Dir.glob('tasks/**/*.rake').each do |rake_file|
 end
 
 # Set up test tasks for each supported connection adapter
-%w(mysql sqlite oracle oracle_enhanced postgresql ibm_db sqlserver).each do |adapter|
+%w(mysql sqlite oracle oracle_enhanced postgresql ibm_db sqlserver trilogy).each do |adapter|
   namespace adapter do
     desc "Run tests using the #{adapter} adapter"
     task "test" do
diff --git a/lib/composite_primary_keys.rb b/lib/composite_primary_keys.rb
index 7fc83cae..1666770d 100644
--- a/lib/composite_primary_keys.rb
+++ b/lib/composite_primary_keys.rb
@@ -114,4 +114,4 @@
 
 require_relative 'composite_primary_keys/arel/to_sql'
 require_relative 'composite_primary_keys/arel/sqlserver'
-require_relative 'composite_primary_keys/table_metadata'
\ No newline at end of file
+require_relative 'composite_primary_keys/table_metadata'
diff --git a/lib/composite_primary_keys/connection_adapters/abstract/database_statements.rb b/lib/composite_primary_keys/connection_adapters/abstract/database_statements.rb
index 56795996..b01107fb 100644
--- a/lib/composite_primary_keys/connection_adapters/abstract/database_statements.rb
+++ b/lib/composite_primary_keys/connection_adapters/abstract/database_statements.rb
@@ -6,8 +6,7 @@ def insert(arel, name = nil, pk = nil, id_value = nil, sequence_name = nil, bind
         value = exec_insert(sql, name, binds, pk, sequence_name)
 
         return id_value if id_value
-
-        if pk.is_a?(Array) && !value.empty?
+        if pk.is_a?(Array) && value.respond_to?(:empty?) && !value.empty?
           # This is a CPK model and the query result is not empty. Thus we can figure out the new ids for each
           # auto incremented field
           pk.map {|key| value.first[key]}
diff --git a/lib/composite_primary_keys/relation.rb b/lib/composite_primary_keys/relation.rb
index 8b19c548..14e23914 100644
--- a/lib/composite_primary_keys/relation.rb
+++ b/lib/composite_primary_keys/relation.rb
@@ -102,6 +102,8 @@ def cpk_subquery(stmt)
       # database adapter to decide how to proceed.
       if defined?(ActiveRecord::ConnectionAdapters::Mysql2Adapter) && connection.is_a?(ActiveRecord::ConnectionAdapters::Mysql2Adapter)
         cpk_mysql_subquery(stmt)
+      elsif defined?(ActiveRecord::ConnectionAdapters::TrilogyAdapter) && connection.is_a?(ActiveRecord::ConnectionAdapters::TrilogyAdapter)
+        cpk_mysql_subquery(stmt)
       elsif defined?(ActiveRecord::ConnectionAdapters::SQLServerAdapter) && connection.is_a?(ActiveRecord::ConnectionAdapters::SQLServerAdapter)
         cpk_exists_subquery(stmt)
       else
diff --git a/scripts/console.rb b/scripts/console.rb
index 27c69cfc..851c8e5e 100755
--- a/scripts/console.rb
+++ b/scripts/console.rb
@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 #
-# if run as script, load the file as library while starting irb 
+# if run as script, load the file as library while starting irb
 #
 if __FILE__ == $0
   irb = RUBY_PLATFORM =~ /(:?mswin|mingw)/ ? 'irb.bat' : 'irb'
@@ -12,7 +12,7 @@
 #
 # check if the given adapter is supported (default: mysql)
 #
-adapters = %w[mysql sqlite oracle oracle_enhanced postgresql ibm_db]
+adapters = %w[mysql sqlite oracle oracle_enhanced postgresql ibm_db trilogy]
 adapter = ENV['ADAPTER'] || 'mysql'
 unless adapters.include? adapter
   puts "Usage: #{__FILE__} <adapter>"
diff --git a/tasks/databases/trilogy.rake b/tasks/databases/trilogy.rake
new file mode 100644
index 00000000..d3e922da
--- /dev/null
+++ b/tasks/databases/trilogy.rake
@@ -0,0 +1,23 @@
+namespace :trilogy do
+  task :setup do
+    require 'bundler'
+    Bundler.require(:default, :trilogy)
+  end
+
+  task :create_database => :setup do
+    Rake::Task["mysql:create_database"].invoke
+  end
+
+  desc 'Build the MySQL test database'
+  task :build_database => [:create_database] do
+    Rake::Task["mysql:build_database"].invoke
+  end
+
+  desc 'Drop the MySQL test database'
+  task :drop_database => :setup do
+    Rake::Task["mysql:drop_database"].invoke
+  end
+
+  desc 'Rebuild the MySQL test database'
+  task :rebuild_database => [:drop_database, :build_database]
+end
diff --git a/test/abstract_unit.rb b/test/abstract_unit.rb
index cbb14f46..4645bf38 100644
--- a/test/abstract_unit.rb
+++ b/test/abstract_unit.rb
@@ -14,6 +14,12 @@
 puts "Loaded #{spec_name}"
 
 # And now connect to the database
+if spec_name == "trilogy"
+  require "activerecord-trilogy-adapter"
+  require "trilogy_adapter/connection"
+  ActiveRecord::Base.extend TrilogyAdapter::Connection
+end
+
 ActiveRecord::Base.establish_connection(spec)
 
 # Tell active record about the configuration
diff --git a/test/connections/databases.ci.yml b/test/connections/databases.ci.yml
index d7ba6c2a..09b63edc 100644
--- a/test/connections/databases.ci.yml
+++ b/test/connections/databases.ci.yml
@@ -20,3 +20,13 @@ sqlite:
   adapter: sqlite3
   database: <%= File.join(project_root, 'db', 'composite_primary_keys_unittest.sqlite') %>
 
+trilogy:
+  adapter: trilogy
+  username: github
+  password: github
+  host: 127.0.0.1
+  port: 3306
+  encoding: utf8mb4
+  charset: utf8mb4
+  collation: utf8mb4_bin
+  database: composite_primary_keys_unittest