getDate(TimeZone tz) { /* ** Ingres dates are overloaded with 'empty' date, ** date only, timestamp and interval values. The ** first three types are handled explicitly below. ** Intervals will either cause an exception while ** attempting to parse the value or as the default ** action for an unrecognized format. */ try { if (value.Length == 0) // Empty date { /* ** Ingres permits zero length date literals or 'empty' ** dates. Since does not have any corresponding ** date/time concept, we use the date epoch. If ** no timezone is provided, we can return the local ** epoch constant. Otherwise, the epoch value for the ** requested timezone must be generated. */ return((tz == null) ? SqlDates.getEpochDate() : SqlDates.parseDate(SqlDates.D_EPOCH, tz)); } else if (value.Length == SqlDates.D_FMT.Length) // Date only { /* ** The date is stored in GMT such as to have a 0 time for ** the target TZ (requested/local). */ return((tz == null) ? SqlDates.parseDate(value, false) : SqlDates.parseDate(value, tz)); } else if (value.Length == SqlDates.TS_FMT.Length) // Timestamp { /* ** Remove the time component but retain correct date: ** ** 1. Convert to GMT Timestamp using TZ for current connection. ** 2. Format as date only using local TZ to get local date. ** 3. Generate Date value using requested/local timezone. */ DateTime date = SqlDates.parseTimestamp(value, use_gmt); String str = SqlDates.formatDate(date, false); return((osql_dates && tz != null) ? SqlDates.parseDate(str, tz) : SqlDates.parseDate(str, false)); } else // Interval { /* ** Can't support intervals with Date objects. */ throw SqlEx.get(ERR_GC401B_INVALID_DATE); } } catch (SqlEx ex) { /* ** Any parsing error is assumed to be caused by an interval. */ interval = true; throw ex; } } // getDate