andygrove commented on code in PR #805:
URL: https://github.com/apache/datafusion-comet/pull/805#discussion_r1731419091
##########
docs/source/user-guide/expressions.md:
##########
@@ -182,6 +182,14 @@ The following Spark expressions are currently available.
Any known compatibility
| VariancePop | |
| VarianceSamp | |
+## Complex Types
+
+| Expression | Notes |
+| ----------------- | --------------------------------- |
+| CreateNamedStruct | Create a struct |
+| GetElementAt | Access a field in a struct |
+| StructsToJson | Convert a struct to a JSON string |
+
Review Comment:
Good point. I have removed these comments.
##########
spark/src/main/scala/org/apache/comet/serde/QueryPlanSerde.scala:
##########
@@ -1210,6 +1210,58 @@ object QueryPlanSerde extends Logging with
ShimQueryPlanSerde with CometExprShim
None
}
+ case StructsToJson(options, child, timezoneId) =>
+ if (options.nonEmpty) {
+ withInfo(expr, "StructsToJson with options is not supported")
+ None
+ } else {
+
+ def isSupportedType(dt: DataType): Boolean = {
+ dt match {
+ case StructType(fields) =>
+ fields.forall(f => isSupportedType(f.dataType))
+ case DataTypes.BooleanType | DataTypes.ByteType |
DataTypes.ShortType |
+ DataTypes.IntegerType | DataTypes.LongType |
DataTypes.FloatType |
+ DataTypes.DoubleType | DataTypes.StringType =>
+ true
+ case DataTypes.DateType | DataTypes.TimestampType =>
+ // TODO implement these types with tests for formatting
options and timezone
+ false
+ case _ => false
+ }
+ }
+
+ val isSupported = child.dataType match {
+ case s: StructType =>
+ s.fields.forall(f => isSupportedType(f.dataType))
+ case _ =>
Review Comment:
I added comments for map/array support
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