support tables with numbers in merge statements. fixes #1337

Author: Justin Dell

lib/active_record/connection_adapters/sqlserver/schema_statements.rb

@@ -721,7 +721,7 @@ def get_raw_table_name(sql)
           elsif s.match?(/^\s*UPDATE\s+.*/i)
             s.match(/UPDATE\s+([^\(\s]+)\s*/i)[1]
           elsif s.match?(/^\s*MERGE INTO.*/i)
-            s.match(/^\s*MERGE\s+INTO\s+(\[?[a-z_ -]+\]?\.?\[?[a-z_ -]+\]?)\s+(AS|WITH|USING)/i)[1]
+            s.match(/^\s*MERGE\s+INTO\s+(\[?[a-z0-9_ -]+\]?\.?\[?[a-z0-9_ -]+\]?)\s+(AS|WITH|USING)/i)[1]
           else
             s.match(/FROM[\s|\(]+((\[[^\(\]]+\])|[^\(\s]+)\s*/i)[1]
           end.strip

test/cases/schema_test_sqlserver.rb

@@ -118,6 +118,10 @@ class SchemaTestSQLServer < ActiveRecord::TestCase
       it do
         assert_equal "[with].[select notation]", connection.send(:get_raw_table_name, "MERGE INTO [with].[select notation] AS target")
       end
+
+      it do
+        assert_equal "[with_numbers_1234]", connection.send(:get_raw_table_name, "MERGE INTO [with_numbers_1234] AS target")
+      end
     end
 
     describe 'CREATE VIEW statements' do