MaxGekk commented on code in PR #39946:
URL: https://github.com/apache/spark/pull/39946#discussion_r1100680165
##########
core/src/main/resources/error/error-classes.json:
##########
@@ -774,6 +774,12 @@
"The expected format is ByteString, but was <unsupported> (<class>)."
]
},
+ "INVALID_COLUMN_NAME" : {
+ "message" : [
+ "Column name <columnName> contains invalid character(s). Please use
alias to rename it."
Review Comment:
The message is slightly generic, and doesn't give a clear picture. From the
source code, the error is a datasource specific, and raised when the datasource
doesn't support a file name that is the same as a column name. Can we rephrase
it:
```suggestion
"The datasource <datasource> cannot save the column <columnName>
because its name contains some characters that are not allowed in file paths.
Please, use an alias to rename it."
```
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