Some time and timezone functions didn't support years before 1.

h2/src/main/org/h2/util/DateTimeUtils.java

@@ -81,6 +81,7 @@ public class DateTimeUtils {
         long time;
         synchronized (cal) {
             cal.setTime(value);
+            cal.set(Calendar.ERA, GregorianCalendar.AD);
             // month is 0 based
             cal.set(DEFAULT_YEAR, DEFAULT_MONTH - 1, DEFAULT_DAY);
             time = cal.getTime().getTime();
@@ -185,6 +186,7 @@ public class DateTimeUtils {
     }
 
     private static void convertTime(Calendar from, Calendar to) {
+        to.set(Calendar.ERA, from.get(Calendar.ERA));
         to.set(Calendar.YEAR, from.get(Calendar.YEAR));
         to.set(Calendar.MONTH, from.get(Calendar.MONTH));
         to.set(Calendar.DAY_OF_MONTH, from.get(Calendar.DAY_OF_MONTH));
@@ -401,6 +403,20 @@ public class DateTimeUtils {
         return value;
     }
 
+    /**
+     * Get the year (positive or negative) from a calendar.
+     *
+     * @param calendar the calendar
+     * @return the year
+     */
+    public static int getYear(Calendar calendar) {
+        int year = calendar.get(Calendar.YEAR);
+        if (calendar.get(Calendar.ERA) == GregorianCalendar.BC) {
+            year = 1 - year;
+        }
+        return year;
+    }
+
     /**
      * Get the number of milliseconds since 1970-01-01 in the local timezone.
      *

h2/src/test/org/h2/test/unit/TestDate.java

@@ -10,12 +10,18 @@ import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
+import java.sql.Timestamp;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
 import java.util.TimeZone;
 
 import org.h2.constant.ErrorCode;
 import org.h2.test.TestBase;
 import org.h2.util.DateTimeUtils;
 import org.h2.value.Value;
+import org.h2.value.ValueDate;
+import org.h2.value.ValueTime;
+import org.h2.value.ValueTimestamp;
 
 /**
  * Tests the data parsing. The problem is that some dates are not allowed
@@ -35,10 +41,35 @@ public class TestDate extends TestBase {
     }
 
     public void test() throws SQLException {
+        testDateTimeUtils();
         testAllTimeZones();
         testCurrentTimeZone();
     }
 
+    private void testDateTimeUtils() {
+        java.sql.Timestamp ts1 = (Timestamp) DateTimeUtils.parseDateTime("-999-08-07 13:14:15.16", Value.TIMESTAMP, 0);
+        java.sql.Timestamp ts2 = (Timestamp) DateTimeUtils.parseDateTime("19999-08-07 13:14:15.16", Value.TIMESTAMP, 0);
+        java.sql.Time t1 = DateTimeUtils.cloneAndNormalizeTime(new java.sql.Time(ts1.getTime()));
+        java.sql.Time t2 = DateTimeUtils.cloneAndNormalizeTime(new java.sql.Time(ts2.getTime()));
+        java.sql.Date d1 = DateTimeUtils.cloneAndNormalizeDate(new java.sql.Date(ts1.getTime()));
+        java.sql.Date d2 = DateTimeUtils.cloneAndNormalizeDate(new java.sql.Date(ts2.getTime()));
+        assertEquals("-999-08-07 13:14:15.16", ValueTimestamp.get(ts1).getString());
+        assertEquals("-999-08-07", ValueDate.get(d1).getString());
+        assertEquals("13:14:15", ValueTime.get(t1).getString());
+        assertEquals("19999-08-07 13:14:15.16", ValueTimestamp.get(ts2).getString());
+        assertEquals("19999-08-07", ValueDate.get(d2).getString());
+        assertEquals("13:14:15", ValueTime.get(t2).getString());
+        Calendar cal = Calendar.getInstance();
+        cal.setTime(t1);
+        assertEquals(GregorianCalendar.AD, cal.get(Calendar.ERA));
+        cal.setTime(t2);
+        assertEquals(GregorianCalendar.AD, cal.get(Calendar.ERA));
+        java.sql.Timestamp ts1a = DateTimeUtils.convertTimestampToCalendar(ts1, Calendar.getInstance());
+        java.sql.Timestamp ts2a = DateTimeUtils.convertTimestampToCalendar(ts2, Calendar.getInstance());
+        assertEquals("-999-08-07 13:14:15.16", ValueTimestamp.get(ts1a).getString());
+        assertEquals("19999-08-07 13:14:15.16", ValueTimestamp.get(ts2a).getString());
+    }
+
     private static void testCurrentTimeZone() {
         for (int year = 1970; year < 2050; year += 3) {
             for (int month = 1; month <= 12; month++) {