yaooqinn commented on a change in pull request #29303:
URL: https://github.com/apache/spark/pull/29303#discussion_r463487059
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File path:
sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkGetColumnsOperation.scala
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@@ -126,12 +124,47 @@ private[hive] class SparkGetColumnsOperation(
HiveThriftServer2.eventManager.onStatementFinish(statementId)
}
+ private def getColumnSize(typ: DataType): Option[Int] = typ match {
+ case StringType | BinaryType => None
+ case ArrayType(et, _) => getColumnSize(et)
+ case MapType(kt, vt, _) =>
+ val kSize = getColumnSize(kt)
+ val vSize = getColumnSize(vt)
+ if (kSize.isEmpty || vSize.isEmpty) {
+ None
+ } else {
+ Some(kSize.get + vSize.get)
+ }
+ case StructType(fields) =>
+ val sizeArr = fields.map(f => getColumnSize(f.dataType))
+ if (sizeArr.contains(None)) {
+ None
+ } else {
+ Some(sizeArr.map(_.get).sum)
+ }
+ case other => Some(other.defaultSize)
+ }
+
+ private def getDecimalDigits(typ: DataType): Option[Int] = typ match {
+ case BooleanType | _: IntegerType => Some(0)
+ case FloatType => Some(7)
+ case DoubleType => Some(15)
Review comment:
They are from hive's `TypeDescriptor` and I also checked the results,
which are same from hive and spark, e.g. `select 0.12345678901234567890D`
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