1 files changed, 3 insertions, 3 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb
index a37557361a..234fb25fdf 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/schema_dumper.rb
@@ -55,7 +55,7 @@ module ActiveRecord
           end
 
           def schema_collation(column)
-            if column.collation && table_name = column.table_name
+            if column.collation
               @table_collation_cache ||= {}
               @table_collation_cache[table_name] ||=
                 @connection.exec_query("SHOW TABLE STATUS LIKE #{@connection.quote(table_name)}", "SCHEMA").first["Collation"]
@@ -65,13 +65,13 @@ module ActiveRecord
 
           def extract_expression_for_virtual_column(column)
             if @connection.mariadb? && @connection.database_version < "10.2.5"
-              create_table_info = @connection.send(:create_table_info, column.table_name)
+              create_table_info = @connection.send(:create_table_info, table_name)
               column_name = @connection.quote_column_name(column.name)
               if %r/#{column_name} #{Regexp.quote(column.sql_type)}(?: COLLATE \w+)? AS \((?<expression>.+?)\) #{column.extra}/ =~ create_table_info
                 $~[:expression].inspect
               end
             else
-              scope = @connection.send(:quoted_scope, column.table_name)
+              scope = @connection.send(:quoted_scope, table_name)
               column_name = @connection.quote(column.name)
               sql = "SELECT generation_expression FROM information_schema.columns" \
                     " WHERE table_schema = #{scope[:schema]}" \