Add dbconsole support to adapter

Adds dbconsole method to be used when invoking bin/rails dbconsole.

Co-authored-by: Paarth Madan <paarth.madan@shopify.com>

lib/active_record/connection_adapters/oracle_enhanced_adapter.rb

@@ -64,19 +64,22 @@
 
 module ActiveRecord
   module ConnectionHandling # :nodoc:
-    # Establishes a connection to the database that's used by all Active Record objects.
-    def oracle_enhanced_connection(config) # :nodoc:
+    def oracle_enhanced_connection_class
       if config[:emulate_oracle_adapter] == true
         # allows the enhanced adapter to look like the OracleAdapter. Useful to pick up
         # conditionals in the rails activerecord test suite
         require "active_record/connection_adapters/emulation/oracle_adapter"
-        ConnectionAdapters::OracleAdapter.new(
-          ConnectionAdapters::OracleEnhanced::Connection.create(config), logger, config)
+        ConnectionAdapters::OracleAdapter
       else
-        ConnectionAdapters::OracleEnhancedAdapter.new(
-          ConnectionAdapters::OracleEnhanced::Connection.create(config), logger, config)
+        ConnectionAdapters::OracleEnhancedAdapter
       end
     end
+
+    # Establishes a connection to the database that's used by all Active Record objects.
+    def oracle_enhanced_connection(config) # :nodoc:
+      oracle_enhanced_connection_class.new(
+        ConnectionAdapters::OracleEnhanced::Connection.create(config), logger, config)
+    end
   end
 
   module ConnectionAdapters # :nodoc:
@@ -275,6 +278,19 @@ def arel_visitor # :nodoc:
         end
       end
 
+      def self.dbconsole(config, options = {})
+        oracle_config = config.configuration_hash
+        logon = ""
+
+        if config[:username]
+          logon = oracle_config[:username].dup
+          logon << "/#{oracle_config[:password]}" if oracle_config[:password] && options[:include_password]
+          logon << "@#{config.database}" if config.database
+        end
+
+        find_cmd_and_exec("sqlplus", logon)
+      end
+
       def build_statement_pool
         StatementPool.new(self.class.type_cast_config_to_integer(@config[:statement_limit]))
       end

spec/active_record/connection_adapters/oracle_enhanced/dbconsole_spec.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+describe "Oracle Enhanced adapter dbconsole" do
+  subject { ActiveRecord::ConnectionAdapters::OracleEnhancedAdapter }
+
+  it "uses sqlplus to connect to database" do
+    expect(subject).to receive(:find_cmd_and_exec).with("sqlplus", "user@db")
+
+    config = make_db_config(adapter: "oracle", database: "db", username: "user", password: "secret")
+
+    subject.dbconsole(config)
+  end
+
+  it "uses sqlplus with password when specified" do
+    expect(subject).to receive(:find_cmd_and_exec).with("sqlplus", "user/secret@db")
+
+    config = make_db_config(adapter: "oracle", database: "db", username: "user", password: "secret")
+
+    subject.dbconsole(config, include_password: true)
+  end
+
+  private
+
+  def make_db_config(config)
+    ActiveRecord::DatabaseConfigurations::HashConfig.new("test", "primary", config)
+  end
+end