[KYUUBI #1565] Move time functions to RowSetUtils and move schema to spark package

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### _Why are the changes needed?_
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1. move time functions from Rowset to RowSetUtils
2. move schema to spark package

### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [X] [Run test](https://kyuubi.readthedocs.io/en/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #1566 from hddong/move-time-functions.

Closes #1565

75de2e8d [hongdongdong] private
8b16217b [hongdongdong] [KYUUBI #1565] Move time functions to RowSetUtils and move schema to spark package

Authored-by: hongdongdong <hongdongdong@cmss.chinamobile.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>

externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/operation/SparkOperation.scala

@@ -27,13 +27,14 @@ import org.apache.spark.sql.types.StructType
 
 import org.apache.kyuubi.{KyuubiSQLException, Utils}
 import org.apache.kyuubi.engine.spark.operation.SparkOperation.TIMEZONE_KEY
+import org.apache.kyuubi.engine.spark.schema.RowSet
+import org.apache.kyuubi.engine.spark.schema.SchemaHelper
 import org.apache.kyuubi.engine.spark.session.SparkSessionImpl
 import org.apache.kyuubi.operation.{AbstractOperation, FetchIterator, OperationState}
 import org.apache.kyuubi.operation.FetchOrientation._
 import org.apache.kyuubi.operation.OperationState.OperationState
 import org.apache.kyuubi.operation.OperationType.OperationType
 import org.apache.kyuubi.operation.log.OperationLog
-import org.apache.kyuubi.schema.{RowSet, SchemaHelper}
 import org.apache.kyuubi.session.Session
 
 abstract class SparkOperation(opType: OperationType, session: Session)

externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/schema/RowSet.scala

@@ -15,25 +15,22 @@
  * limitations under the License.
  */
 
-package org.apache.kyuubi.schema
+package org.apache.kyuubi.engine.spark.schema
 
 import java.nio.ByteBuffer
 import java.nio.charset.StandardCharsets
 import java.sql.Timestamp
-import java.text.SimpleDateFormat
 import java.time.{Instant, LocalDate, ZoneId}
-import java.time.chrono.IsoChronology
-import java.time.format.{DateTimeFormatter, DateTimeFormatterBuilder}
-import java.time.temporal.ChronoField
-import java.util.{Date, Locale}
+import java.util.Date
 
 import scala.collection.JavaConverters._
-import scala.language.implicitConversions
 
 import org.apache.hive.service.rpc.thrift._
 import org.apache.spark.sql.Row
 import org.apache.spark.sql.types._
 
+import org.apache.kyuubi.util.RowSetUtils._
+
 object RowSet {
 
   def toTRowSet(
@@ -146,10 +143,6 @@ object RowSet {
     ret
   }
 
-  implicit private def bitSetToBuffer(bitSet: java.util.BitSet): ByteBuffer = {
-    ByteBuffer.wrap(bitSet.toByteArray)
-  }
-
   private def toTColumnValue(
       ordinal: Int,
       row: Row,
@@ -206,29 +199,6 @@ object RowSet {
     }
   }
 
-  private def createBuilder(): DateTimeFormatterBuilder = {
-    new DateTimeFormatterBuilder().parseCaseInsensitive()
-  }
-
-  private lazy val dateFormatter = {
-    createBuilder().appendPattern("yyyy-MM-dd")
-      .toFormatter(Locale.US)
-      .withChronology(IsoChronology.INSTANCE)
-  }
-
-  private lazy val simpleDateFormatter = new SimpleDateFormat("yyyy-MM-dd", Locale.US)
-
-  private lazy val timestampFormatter: DateTimeFormatter = {
-    createBuilder().appendPattern("yyyy-MM-dd HH:mm:ss")
-      .appendFraction(ChronoField.NANO_OF_SECOND, 0, 9, true)
-      .toFormatter(Locale.US)
-      .withChronology(IsoChronology.INSTANCE)
-  }
-
-  private lazy val simpleTimestampFormatter = {
-    new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.US)
-  }
-
   /**
    * A simpler impl of Spark's toHiveString
    */

externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/schema/SchemaHelper.scala

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.kyuubi.schema
+package org.apache.kyuubi.engine.spark.schema
 
 import java.util.Collections
 

externals/kyuubi-spark-sql-engine/src/main/scala/org/apache/kyuubi/engine/spark/shim/SparkCatalogShim.scala

@@ -23,7 +23,7 @@ import org.apache.spark.sql.types.StructField
 
 import org.apache.kyuubi.Logging
 import org.apache.kyuubi.engine.spark.KyuubiSparkUtil.sparkMajorMinorVersion
-import org.apache.kyuubi.schema.SchemaHelper
+import org.apache.kyuubi.engine.spark.schema.SchemaHelper
 
 /**
  * A shim that defines the interface interact with Spark's catalogs

externals/kyuubi-spark-sql-engine/src/test/scala/org/apache/kyuubi/engine/spark/schema/RowSetSuite.scala

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.kyuubi.schema
+package org.apache.kyuubi.engine.spark.schema
 
 import java.nio.ByteBuffer
 import java.nio.charset.StandardCharsets
@@ -30,7 +30,7 @@ import org.apache.spark.sql.types._
 import org.apache.spark.unsafe.types.CalendarInterval
 
 import org.apache.kyuubi.KyuubiFunSuite
-import org.apache.kyuubi.schema.RowSet.toHiveString
+import org.apache.kyuubi.engine.spark.schema.RowSet.toHiveString
 
 class RowSetSuite extends KyuubiFunSuite {
 

externals/kyuubi-spark-sql-engine/src/test/scala/org/apache/kyuubi/engine/spark/schema/SchemaHelperSuite.scala

@@ -15,7 +15,7 @@
  * limitations under the License.
  */
 
-package org.apache.kyuubi.schema
+package org.apache.kyuubi.engine.spark.schema
 
 import scala.collection.JavaConverters._
 
@@ -23,11 +23,10 @@ import org.apache.hive.service.rpc.thrift.{TCLIServiceConstants, TTypeId}
 import org.apache.spark.sql.types._
 
 import org.apache.kyuubi.KyuubiFunSuite
+import org.apache.kyuubi.engine.spark.schema.SchemaHelper._
 
 class SchemaHelperSuite extends KyuubiFunSuite {
 
-  import SchemaHelper._
-
   val innerSchema: StructType = new StructType()
     .add("a", StringType, nullable = true, "")
     .add("b", IntegerType, nullable = true, "")

kyuubi-common/src/main/scala/org/apache/kyuubi/util/RowSetUtils.scala

@@ -18,10 +18,39 @@
 package org.apache.kyuubi.util
 
 import java.nio.ByteBuffer
+import java.text.SimpleDateFormat
+import java.time.chrono.IsoChronology
+import java.time.format.DateTimeFormatter
+import java.time.format.DateTimeFormatterBuilder
+import java.time.temporal.ChronoField
+import java.util.Locale
 
 import scala.language.implicitConversions
 
-object RowSetUtils {
+private[kyuubi] object RowSetUtils {
+
+  lazy val dateFormatter = {
+    createDateTimeFormatterBuilder().appendPattern("yyyy-MM-dd")
+      .toFormatter(Locale.US)
+      .withChronology(IsoChronology.INSTANCE)
+  }
+
+  lazy val simpleDateFormatter = new SimpleDateFormat("yyyy-MM-dd", Locale.US)
+
+  lazy val timestampFormatter: DateTimeFormatter = {
+    createDateTimeFormatterBuilder().appendPattern("yyyy-MM-dd HH:mm:ss")
+      .appendFraction(ChronoField.NANO_OF_SECOND, 0, 9, true)
+      .toFormatter(Locale.US)
+      .withChronology(IsoChronology.INSTANCE)
+  }
+
+  lazy val simpleTimestampFormatter = {
+    new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS", Locale.US)
+  }
+
+  private def createDateTimeFormatterBuilder(): DateTimeFormatterBuilder = {
+    new DateTimeFormatterBuilder().parseCaseInsensitive()
+  }
 
   implicit def bitSetToBuffer(bitSet: java.util.BitSet): ByteBuffer = {
     ByteBuffer.wrap(bitSet.toByteArray)