Adding start transaction and commit as keywords for mysql command tra…

…cking. We happen to use different keywords for transactions than facebook does, this makes it work properly for us.

Summary: Closes facebook#7023

Reviewed By: paulbiss

Differential Revision: D3225855

fbshipit-source-id: b292a59d35e79bfd4ca189f4990c6faf4994ba1c

hphp/runtime/ext/mysql/mysql_common.cpp

@@ -1430,13 +1430,14 @@ MySQLQueryReturn php_mysql_do_query(const String& query, const Variant& link_id,
       }
     } else {
       preg_match("/^(?:(?:\\/\\*.*?\\*\\/)|\\(|\\s)*"
-                 "(begin|commit|rollback|select)/is",
+                 "(start transaction|begin|commit|rollback|select)/is",
                  query, &matches);
       auto marray = matches.toArray();
       size = marray.size();
       if (size == 2) {
         auto verb = toLower(marray[1].toString().slice());
-        rconn->m_xaction_count = ((verb == "begin") ? 1 : 0);
+        rconn->m_xaction_count = ((verb == "begin" ||
+                                   verb == "start transaction") ? 1 : 0);
         ServerStats::Log(std::string("sql.query.") + verb, 1);
         if (RuntimeOption::EnableStats && RuntimeOption::EnableSQLTableStats) {
           MySqlStats::Record(verb);