hook-up SchemaCreation for HSQLDB/H2

Author: kares

lib/arjdbc/hsqldb/adapter.rb

@@ -1,5 +1,6 @@
 ArJdbc.load_java_part :HSQLDB
 require 'arjdbc/hsqldb/explain_support'
+require 'arjdbc/hsqldb/schema_creation' # AR 4.x
 
 module ArJdbc
   module HSQLDB
@@ -166,7 +167,7 @@ def add_column(table_name, column_name, type, options = {})
       add_column_sql = "ALTER TABLE #{quote_table_name(table_name)} ADD #{quote_column_name(column_name)} #{type_to_sql(type, options[:limit], options[:precision], options[:scale])}"
       add_column_options!(add_column_sql, options)
       execute(add_column_sql)
-    end
+    end unless const_defined? :SchemaCreation
 
     # @override
     def change_column(table_name, column_name, type, options = {})

lib/arjdbc/hsqldb/schema_creation.rb

@@ -0,0 +1,11 @@
+module ArJdbc
+  module HSQLDB
+    # @private
+    SchemaCreation = ::ActiveRecord::ConnectionAdapters::AbstractAdapter::SchemaCreation
+
+    def schema_creation
+      SchemaCreation.new self
+    end
+
+  end
+end if ::ActiveRecord::ConnectionAdapters::AbstractAdapter.const_defined? :SchemaCreation