MaxGekk commented on code in PR #54900:
URL: https://github.com/apache/spark/pull/54900#discussion_r3387834514
##########
common/utils/src/main/resources/error/error-conditions.json:
##########
@@ -7004,6 +7004,12 @@
],
"sqlState" : "42803"
},
+ "UNRESOLVED_COLLECTION_CLS" : {
+ "message" : [
+ "Custom collection class is not resolved. Ensure the class is accessible
and properly defined before analysis."
Review Comment:
The second sentence of the message is inaccurate. The error fires when
`customCollectionCls == None` — no custom collection class was provided at all.
"Ensure the class is accessible and properly defined" implies a class exists
but can't be loaded, which would send the reader chasing a class-loading
problem that doesn't exist.
Suggested replacement:
```suggestion
"Cannot determine the data type of an unresolved MapObjects
expression. The expression must be resolved through analysis before its type
can be accessed."
```
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