srowen commented on code in PR #36296:
URL: https://github.com/apache/spark/pull/36296#discussion_r856943887
##########
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/orc/OrcUtils.scala:
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@@ -224,7 +224,9 @@ object OrcUtils extends Logging {
// the physical schema doesn't match the data schema).
// In these cases we map the physical schema to the data schema by
index.
assert(orcFieldNames.length <= dataSchema.length, "The given data
schema " +
- s"${dataSchema.catalogString} has less fields than the actual ORC
physical schema, " +
+ s"${dataSchema.catalogString} (length:${dataSchema.length}) " +
+ s"has less ${orcFieldNames.length - dataSchema.length} fields than "
+
Review Comment:
Tiny nit: less -> fewer
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