Github user mallman commented on the issue:
https://github.com/apache/spark/pull/15566
I went through the script I wrote for
https://issues.apache.org/jira/browse/SPARK-17990. At the point where I ran
```
(0 to 9).foreach { p => sql(s"alter table mixed_case_partitioning add
partition(partCol=$p)") }
```
I got an exception:
```
org.apache.spark.sql.AnalysisException: Partition spec is invalid. The spec
(partCol) must match the partition spec (partcol) defined in table
'`default`.`mixed_case_partitioning`';
at
org.apache.spark.sql.catalyst.catalog.SessionCatalog$$anonfun$requireExactMatchedPartitionSpec$1.apply(SessionCatalog.scala:768)
at
org.apache.spark.sql.catalyst.catalog.SessionCatalog$$anonfun$requireExactMatchedPartitionSpec$1.apply(SessionCatalog.scala:766)
at
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
at
org.apache.spark.sql.catalyst.catalog.SessionCatalog.requireExactMatchedPartitionSpec(SessionCatalog.scala:766)
at
org.apache.spark.sql.catalyst.catalog.SessionCatalog.createPartitions(SessionCatalog.scala:669)
at
org.apache.spark.sql.execution.command.AlterTableAddPartitionCommand.run(ddl.scala:357)
at
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult$lzycompute(commands.scala:58)
at
org.apache.spark.sql.execution.command.ExecutedCommandExec.sideEffectResult(commands.scala:56)
at
org.apache.spark.sql.execution.command.ExecutedCommandExec.doExecute(commands.scala:72)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$execute$1.apply(SparkPlan.scala:114)
at
org.apache.spark.sql.execution.SparkPlan$$anonfun$executeQuery$1.apply(SparkPlan.scala:135)
at
org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
at
org.apache.spark.sql.execution.SparkPlan.executeQuery(SparkPlan.scala:132)
at org.apache.spark.sql.execution.SparkPlan.execute(SparkPlan.scala:113)
at
org.apache.spark.sql.execution.QueryExecution.toRdd$lzycompute(QueryExecution.scala:87)
at
org.apache.spark.sql.execution.QueryExecution.toRdd(QueryExecution.scala:87)
at org.apache.spark.sql.Dataset.<init>(Dataset.scala:183)
at org.apache.spark.sql.Dataset$.ofRows(Dataset.scala:62)
at org.apache.spark.sql.SparkSession.sql(SparkSession.scala:590)
at $anonfun$1.apply(<console>:24)
at $anonfun$1.apply(<console>:24)
at scala.collection.immutable.Range.foreach(Range.scala:160)
... 48 elided
```
While this PR is not a fix, I'd call this an improvement on the previous
behavior which would silently do the wrong thing.
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