Use method from Rails master

Author: aidanharan

lib/active_record/connection_adapters/sqlserver/core_ext/query_methods.rb

@@ -9,9 +9,11 @@ module QueryMethods
 
           private
 
-          # Same as original except quoted table name is regex escapes.
+          # Copy of original from Rails master. This patch can be removed when adapter supports Rails 6.
           def table_name_matches?(from)
-            /(?:\A|(?<!FROM)\s)(?:\b#{table.name}\b|#{Regexp.escape(connection.quote_table_name(table.name))})(?!\.)/i.match?(from.to_s)
+            table_name = Regexp.escape(table.name)
+            quoted_table_name = Regexp.escape(connection.quote_table_name(table.name))
+            /(?:\A|(?<!FROM)\s)(?:\b#{table_name}\b|#{quoted_table_name})(?!\.)/i.match?(from.to_s)
           end
         end
       end