Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/14210#discussion_r71651476 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/SparkSqlParser.scala --- @@ -344,6 +344,11 @@ class SparkSqlAstBuilder(conf: SQLConf) extends AstBuilder { table, provider, partitionColumnNames, bucketSpec, mode, options, query) } else { val struct = Option(ctx.colTypeList()).map(createStructType) + if (struct.isEmpty && bucketSpec.nonEmpty) { --- End diff -- IIRC, we do similar check for partition columns, if the schema is inferred, we will warn users that the specified partition columns are ignored, by log. Should we follow it?
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