Update ExprTimeValue by datetimeValue and other interfaces. Add c…

…orresponding tests.

Signed-off-by: Yury-Fridlyand <[email protected]>

core/src/main/java/org/opensearch/sql/data/model/ExprTimeValue.java

@@ -8,7 +8,12 @@
 
 import static org.opensearch.sql.utils.DateTimeFormatters.TIME_FORMATTER_VARIABLE_NANOS;
 
+import java.time.Instant;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
 import java.time.LocalTime;
+import java.time.ZoneId;
+import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.time.format.DateTimeParseException;
 import java.util.Objects;
@@ -51,6 +56,21 @@ public LocalTime timeValue() {
     return time;
   }
 
+  @Override
+  public LocalDate dateValue() {
+    return LocalDate.now();
+  }
+
+  @Override
+  public LocalDateTime datetimeValue() {
+    return LocalDateTime.of(dateValue(), timeValue());
+  }
+
+  @Override
+  public Instant timestampValue() {
+    return ZonedDateTime.of(dateValue(), timeValue(), ZoneId.systemDefault()).toInstant();
+  }
+
   @Override
   public String toString() {
     return String.format("TIME '%s'", value());

core/src/test/java/org/opensearch/sql/data/model/DateTimeValueTest.java

@@ -31,6 +31,10 @@ public void timeValueInterfaceTest() {
 
     assertEquals(TIME, timeValue.type());
     assertEquals(LocalTime.parse("01:01:01"), timeValue.timeValue());
+    assertEquals(LocalDate.now(), timeValue.dateValue());
+    assertEquals(LocalDate.now().atTime(1, 1, 1), timeValue.datetimeValue());
+    assertEquals(ZonedDateTime.of(LocalTime.parse("01:01:01").atDate(LocalDate.now()),
+        ZoneId.systemDefault()).toInstant(), timeValue.timestampValue());
     assertEquals("01:01:01", timeValue.value());
     assertEquals("TIME '01:01:01'", timeValue.toString());
     assertThrows(ExpressionEvaluationException.class, () -> integerValue(1).timeValue(),