[spark] Fix the result of migrate database procedure

[Zouxxyy]

Purpose

CALL sys.migrate_database(source_type => 'hive', database => '$hiveDbName', options => 'file.format=$format')

java.lang.String cannot be cast to org.apache.spark.unsafe.types.UTF8String
java.lang.ClassCastException: java.lang.String cannot be cast to org.apache.spark.unsafe.types.UTF8String
	at org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow.getUTF8String(rows.scala:45)
	at org.apache.spark.sql.catalyst.expressions.BaseGenericInternalRow.getUTF8String$(rows.scala:45)
	at org.apache.spark.sql.catalyst.expressions.GenericInternalRow.getUTF8String(rows.scala:165)
	at org.apache.spark.sql.catalyst.expressions.GeneratedClass$SpecificUnsafeProjection.apply(Unknown Source)
	at org.apache.spark.sql.execution.CommandResultExec.$anonfun$unsafeRows$1(CommandResultExec.scala:48)
	at scala.collection.TraversableLike.$anonfun$map$1(TraversableLike.scala:286)
	at scala.collection.mutable.ResizableArray.foreach(ResizableArray.scala:62)

Tests

API and Format

Documentation

[wwj6591812]

+1

[xuzifu666]

+1