Support following datetime casts in v2:

date str -> timestamp
timestamp str -> date
timestamp str -> time

Signed-off-by: Yuanchun Shen <yuanchu@amazon.com>

Author: yuancu

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

@@ -5,17 +5,15 @@
 
 package org.opensearch.sql.data.model;
 
-import static org.opensearch.sql.utils.DateTimeFormatters.DATE_TIME_FORMATTER_VARIABLE_NANOS_OPTIONAL;
-
 import com.google.common.base.Objects;
 import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalTime;
 import java.time.ZoneOffset;
 import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
-import java.time.format.DateTimeParseException;
 import lombok.RequiredArgsConstructor;
+import org.opensearch.sql.calcite.utils.datetime.DateTimeParser;
 import org.opensearch.sql.data.type.ExprCoreType;
 import org.opensearch.sql.data.type.ExprType;
 import org.opensearch.sql.exception.SemanticCheckException;
@@ -29,8 +27,8 @@ public class ExprDateValue extends AbstractExprValue {
   /** Constructor of ExprDateValue. */
   public ExprDateValue(String date) {
     try {
-      this.date = LocalDate.parse(date, DATE_TIME_FORMATTER_VARIABLE_NANOS_OPTIONAL);
-    } catch (DateTimeParseException e) {
+      this.date = DateTimeParser.parseDateOrTimestamp(date).toLocalDate();
+    } catch (SemanticCheckException e) {
       throw new SemanticCheckException(
           String.format("date:%s in unsupported format, please use 'yyyy-MM-dd'", date));
     }

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

@@ -6,16 +6,15 @@
 package org.opensearch.sql.data.model;
 
 import static java.time.format.DateTimeFormatter.ISO_LOCAL_TIME;
-import static org.opensearch.sql.utils.DateTimeFormatters.DATE_TIME_FORMATTER_VARIABLE_NANOS_OPTIONAL;
 
 import java.time.Instant;
 import java.time.LocalDate;
 import java.time.LocalTime;
 import java.time.ZoneOffset;
 import java.time.ZonedDateTime;
-import java.time.format.DateTimeParseException;
 import java.util.Objects;
 import lombok.RequiredArgsConstructor;
+import org.opensearch.sql.calcite.utils.datetime.DateTimeParser;
 import org.opensearch.sql.data.type.ExprCoreType;
 import org.opensearch.sql.data.type.ExprType;
 import org.opensearch.sql.exception.SemanticCheckException;
@@ -30,8 +29,8 @@ public class ExprTimeValue extends AbstractExprValue {
   /** Constructor of ExprTimeValue. */
   public ExprTimeValue(String time) {
     try {
-      this.time = LocalTime.parse(time, DATE_TIME_FORMATTER_VARIABLE_NANOS_OPTIONAL);
-    } catch (DateTimeParseException e) {
+      this.time = DateTimeParser.parseTimeOrTimestamp(time).toLocalTime();
+    } catch (SemanticCheckException e) {
       throw new SemanticCheckException(
           String.format("time:%s in unsupported format, please use 'HH:mm:ss[.SSSSSSSSS]'", time));
     }

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

@@ -13,10 +13,10 @@
 import java.time.LocalDateTime;
 import java.time.LocalTime;
 import java.time.ZoneOffset;
-import java.time.format.DateTimeParseException;
 import java.time.temporal.ChronoUnit;
 import java.util.Objects;
 import lombok.RequiredArgsConstructor;
+import org.opensearch.sql.calcite.utils.datetime.DateTimeParser;
 import org.opensearch.sql.data.type.ExprCoreType;
 import org.opensearch.sql.data.type.ExprType;
 import org.opensearch.sql.exception.SemanticCheckException;
@@ -31,10 +31,8 @@ public class ExprTimestampValue extends AbstractExprValue {
   public ExprTimestampValue(String timestamp) {
     try {
       this.timestamp =
-          LocalDateTime.parse(timestamp, DATE_TIME_FORMATTER_VARIABLE_NANOS)
-              .atZone(ZoneOffset.UTC)
-              .toInstant();
-    } catch (DateTimeParseException e) {
+          DateTimeParser.parseDateOrTimestamp(timestamp).atZone(ZoneOffset.UTC).toInstant();
+    } catch (SemanticCheckException e) {
       throw new SemanticCheckException(
           String.format(
               "timestamp:%s in unsupported format, please use 'yyyy-MM-dd HH:mm:ss[.SSSSSSSSS]'",