Merge "People might want GROUP_CONCAT." into qt-dev

    private static final Pattern sLimitPattern =

            Pattern.compile("\\s*\\d+\\s*(,\\s*\\d+\\s*)?");

    private static final Pattern sAggregationPattern = Pattern.compile(

            "(?i)(AVG|COUNT|MAX|MIN|SUM|TOTAL)\\((.+)\\)");

            "(?i)(AVG|COUNT|MAX|MIN|SUM|TOTAL|GROUP_CONCAT)\\((.+)\\)");

    private Map<String, String> mProjectionMap = null;

    private List<Pattern> mProjectionGreylist = null;