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[CARBONDATA-3039] Fix Custom Deterministic Expression for rand() UDF #2845

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[CARBONDATA-3039] Fix Custom Deterministic Expression for rand() UDF #2845

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12 changes: 7 additions & 5 deletions integration/spark2/src/main/scala/org/apache/spark/sql/CustomDeterministicExpression.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -26,15 +26,17 @@ import org.apache.spark.sql.types.{DataType, StringType}
* Custom expression to override the deterministic property .
*/
case class CustomDeterministicExpression(nonDt: Expression ) extends Expression with Serializable{
override def nullable: Boolean = true
override def nullable: Boolean = nonDt.nullable

override def eval(input: InternalRow): Any = null
override def eval(input: InternalRow): Any = nonDt.eval(input)

override def dataType: DataType = StringType
override def dataType: DataType = nonDt.dataType

override def children: Seq[Expression] = Seq()
override def children: Seq[Expression] = nonDt.children

def childexp : Expression = nonDt
def childexp: Expression = nonDt

override def genCode(ctx: CodegenContext): ExprCode = nonDt.genCode(ctx)

override protected def doGenCode(ctx: CodegenContext, ev: ExprCode): ExprCode = ev.copy("")
}