cloud-fan commented on code in PR #36150:
URL: https://github.com/apache/spark/pull/36150#discussion_r919012662
##########
core/src/main/resources/error/error-classes.json:
##########
@@ -256,6 +256,18 @@
"Key <keyValue> does not exist. Use `try_element_at` to tolerate
non-existent key and return NULL instead. If necessary set <config> to
\"false\" to bypass this error."
]
},
+ "MELT_REQUIRES_VALUE_COLUMNS" : {
+ "message" : [
+ "At least one non-id column is required to melt. All columns are id
columns: [<ids>]"
Review Comment:
Maybe clearer to say: `At least one value column needs to be specified for
UNPIVOT.`
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