vinodkc commented on code in PR #38419:
URL: https://github.com/apache/spark/pull/38419#discussion_r1089829236
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/mathExpressions.scala:
##########
@@ -331,6 +332,247 @@ case class RoundCeil(child: Expression, scale: Expression)
copy(child = newLeft, scale = newRight)
}
+case class TruncNumber(child: Expression, scale: Expression)
+ extends BaseBinaryExpression with NullIntolerant {
+
+ override protected def withNewChildrenInternal(
+ newLeft: Expression,
+ newRight: Expression): TruncNumber = copy(child = newLeft, scale =
newRight)
+
+ /**
+ * Returns Java source code that can be compiled to evaluate this
expression. The default
+ * behavior is to call the eval method of the expression. Concrete
expression implementations
+ * should override this to do actual code generation.
+ *
+ * @param ctx
+ * a [[CodegenContext]]
+ * @param ev
+ * an [[ExprCode]] with unique terms.
+ * @return
+ * an [[ExprCode]] containing the Java source code to generate the given
expression
+ */
+ override protected def doGenCode(ctx: CodegenContext, ev: ExprCode):
ExprCode =
+ defineCodeGen(
+ ctx,
+ ev,
+ (input, _) => {
+ dataType match {
+ case ByteType if (scaleValue <= 0) =>
+
s"""(byte)(org.apache.spark.sql.catalyst.expressions.TruncNumber.trunc(
+ |(long)$input, $scaleValue))""".stripMargin
+ case ShortType if (scaleValue <= 0) =>
+
s"""(short)(org.apache.spark.sql.catalyst.expressions.TruncNumber.trunc(
+ |(long)$input, $scaleValue))""".stripMargin
+ case IntegerType if (scaleValue <= 0) =>
+
s"""(int)(org.apache.spark.sql.catalyst.expressions.TruncNumber.trunc(
+ |(long)$input, $scaleValue))""".stripMargin
+ case LongType if (scaleValue <= 0) =>
+ s"""(org.apache.spark.sql.catalyst.expressions.TruncNumber.trunc(
+ |$input, $scaleValue))""".stripMargin
+ case FloatType if (scaleValue <= 0) =>
+ s"""org.apache.spark.sql.catalyst.expressions.TruncNumber.trunc(
+ |$input, $scaleValue).floatValue()""".stripMargin
+ case DoubleType if (scaleValue <= 0) =>
+ s"""org.apache.spark.sql.catalyst.expressions.TruncNumber.trunc(
+ |$input, $scaleValue).doubleValue()""".stripMargin
+ case DecimalType.Fixed(p, s) =>
+ s"""Decimal.apply(
+ |org.apache.spark.sql.catalyst.expressions.TruncNumber.trunc(
+ |${input}.toJavaBigDecimal(), $scaleValue), $p, $s)""".stripMargin
+ case _ => s"$input"
+ }
+ })
+
+ /**
+ * Returns the [[DataType]] of the result of evaluating this expression. It
is invalid to query
+ * the dataType of an unresolved expression (i.e., when `resolved` == false).
+ */
+ override lazy val dataType: DataType = child.dataType
+
+ /**
+ * Called by default [[eval]] implementation. If subclass of
BinaryExpression keep the default
Review Comment:
Done
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