[GitHub] [spark] HyukjinKwon commented on a change in pull request #26942: [SPARK-30301][SQL] Fix wrong results when datetimes as fields of complex types

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HyukjinKwon commented on a change in pull request #26942: [SPARK-30301][SQL] Fix wrong results when datetimes as fields of complex types
URL: https://github.com/apache/spark/pull/26942#discussion_r397604342
 
 

 ##########
 File path: sql/core/src/main/scala/org/apache/spark/sql/execution/HiveResult.scala
 ##########
 @@ -56,78 +56,41 @@ object HiveResult {
       // We need the types so we can output struct field names
       val types = executedPlan.output.map(_.dataType)
       // Reformat to match hive tab delimited output.
-      result.map(_.zip(types).map(toHiveString)).map(_.mkString("\t"))
+      result.map(_.zip(types).map(e => toHiveString(e)))
+        .map(_.mkString("\t"))
   }
 
-  private val primitiveTypes = Seq(
-    StringType,
-    IntegerType,
-    LongType,
-    DoubleType,
-    FloatType,
-    BooleanType,
-    ByteType,
-    ShortType,
-    DateType,
-    TimestampType,
-    BinaryType)
-
   private lazy val zoneId = DateTimeUtils.getZoneId(SQLConf.get.sessionLocalTimeZone)
   private lazy val dateFormatter = DateFormatter(zoneId)
   private lazy val timestampFormatter = TimestampFormatter.getFractionFormatter(zoneId)
 
-  /** Hive outputs fields of structs slightly differently than top level attributes. */
-  private def toHiveStructString(a: (Any, DataType)): String = a match {
-    case (struct: Row, StructType(fields)) =>
-      struct.toSeq.zip(fields).map {
-        case (v, t) => s""""${t.name}":${toHiveStructString((v, t.dataType))}"""
-      }.mkString("{", ",", "}")
-    case (seq: Seq[_], ArrayType(typ, _)) =>
-      seq.map(v => (v, typ)).map(toHiveStructString).mkString("[", ",", "]")
-    case (map: Map[_, _], MapType(kType, vType, _)) =>
-      map.map {
-        case (key, value) =>
-          toHiveStructString((key, kType)) + ":" + toHiveStructString((value, vType))
-      }.toSeq.sorted.mkString("{", ",", "}")
-    case (null, _) => "null"
-    case (s: String, StringType) => "\"" + s + "\""
-    case (decimal, DecimalType()) => decimal.toString
-    case (interval: CalendarInterval, CalendarIntervalType) =>
-      SQLConf.get.intervalOutputStyle match {
-        case SQL_STANDARD => toSqlStandardString(interval)
-        case ISO_8601 => toIso8601String(interval)
-        case MULTI_UNITS => toMultiUnitsString(interval)
-      }
-    case (other, tpe) if primitiveTypes contains tpe => other.toString
-  }
-
   /** Formats a datum (based on the given data type) and returns the string representation. */
-  def toHiveString(a: (Any, DataType)): String = a match {
-    case (struct: Row, StructType(fields)) =>
-      struct.toSeq.zip(fields).map {
-        case (v, t) => s""""${t.name}":${toHiveStructString((v, t.dataType))}"""
-      }.mkString("{", ",", "}")
-    case (seq: Seq[_], ArrayType(typ, _)) =>
-      seq.map(v => (v, typ)).map(toHiveStructString).mkString("[", ",", "]")
-    case (map: Map[_, _], MapType(kType, vType, _)) =>
-      map.map {
-        case (key, value) =>
-          toHiveStructString((key, kType)) + ":" + toHiveStructString((value, vType))
-      }.toSeq.sorted.mkString("{", ",", "}")
-    case (null, _) => "NULL"
+  def toHiveString(a: (Any, DataType), nested: Boolean = false): String = a match {
+    case (null, _) => if (nested) "null" else "NULL"
+    case (b, BooleanType) => b.toString
     case (d: Date, DateType) => dateFormatter.format(DateTimeUtils.fromJavaDate(d))
     case (t: Timestamp, TimestampType) =>
-      DateTimeUtils.timestampToString(timestampFormatter, DateTimeUtils.fromJavaTimestamp(t))
+      timestampFormatter.format(DateTimeUtils.fromJavaTimestamp(t))
     case (bin: Array[Byte], BinaryType) => new String(bin, StandardCharsets.UTF_8)
 
 Review comment:
   Hm, but IIRC Hive results string from binary, and this is `toHiveString`.  Does Hive return `<BINARY_BLOB>`?

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