peter-toth commented on code in PR #2075:
URL: https://github.com/apache/datafusion-comet/pull/2075#discussion_r2259627649
##########
spark/src/main/spark-4.0/org/apache/comet/shims/CometExprShim.scala:
##########
@@ -34,6 +42,42 @@ trait CometExprShim {
protected def evalMode(c: Cast): CometEvalMode.Value =
CometEvalModeUtil.fromSparkEvalMode(c.evalMode)
+
+ def versionSpecificExprToProtoInternal(
+ expr: Expression,
+ inputs: Seq[Attribute],
+ binding: Boolean): Option[Expr] = {
+ expr match {
+ case s: StaticInvoke
+ if s.staticObject == classOf[StringDecode] &&
+ s.dataType.isInstanceOf[StringType] &&
+ s.functionName == "decode" &&
+ s.arguments.size == 4 &&
+ s.inputTypes == Seq(
+ BinaryType,
+ StringTypeWithCollation(supportsTrimCollation = true),
+ BooleanType,
+ BooleanType) =>
+ val Seq(bin, charset, _, _) = s.arguments
+ charset match {
+ case Literal(str, DataTypes.StringType)
+ if str.toString.toLowerCase(Locale.ROOT) == "utf-8" =>
+ // decode(col, 'utf-8') can be treated as a cast with "try" eval
mode that puts nulls
Review Comment:
Yeah, the proto encoding logic is the same. We can extract it to small
helper:
https://github.com/apache/datafusion-comet/pull/2075/commits/b830922a1e07f96823fd660df29cf7be0ef0042f
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