docs: public void parseFromXml(VoltXMLElement xmlSQL) {
          m_recentErrorMsg = null;
          m_xmlSQL = xmlSQL;
          if (m_xmlSQL.attributes.containsKey(UPSERT_TAG)) {
              m_isUpsert = true;
          }
  
          m_planSelector.outputCompiledStatement(m_xmlSQL);
      }