feiwei8586 commented on issue #5673:
URL: https://github.com/apache/hudi/issues/5673#issuecomment-1200959361
in
hudi-spark-datasource/hudi-spark3.2.x/src/main/scala/org/apache/spark/sql/hudi/catalog)/HoodieCatalog.scala
spark change table column name is not support . @XuQianJin-Stars
@YannByron
override def alterTable(ident: Identifier, changes: TableChange*): Table =
{
loadTable(ident) match {
case HoodieV1OrV2Table(table) => {
val tableIdent = TableIdentifier(ident.name(),
ident.namespace().lastOption)
changes.groupBy(c => c.getClass).foreach {
case (t, newColumns) if t == classOf[AddColumn] =>
AlterHoodieTableAddColumnsCommand(
tableIdent,
newColumns.asInstanceOf[Seq[AddColumn]].map { col =>
StructField(
col.fieldNames()(0),
col.dataType(),
col.isNullable)
}).run(spark)
case (t, columnChanges) if
classOf[ColumnChange].isAssignableFrom(t) =>
columnChanges.foreach {
case dataType: UpdateColumnType =>
val colName = UnresolvedAttribute(dataType.fieldNames()).name
val newDataType = dataType.newDataType()
val structField = StructField(colName, newDataType)
AlterHoodieTableChangeColumnCommand(tableIdent, colName,
structField).run(spark)
case dataType: UpdateColumnComment =>
val newComment = dataType.newComment()
val colName = UnresolvedAttribute(dataType.fieldNames()).name
val fieldOpt =
table.schema.findNestedField(dataType.fieldNames(), includeCollections = true,
spark.sessionState.conf.resolver).map(_._2)
val field = fieldOpt.getOrElse {
throw new AnalysisException(
s"Couldn't find column $colName
in:\n${table.schema.treeString}")
}
AlterHoodieTableChangeColumnCommand(tableIdent, colName,
field.withComment(newComment)).run(spark)
}
case (t, _) =>
throw new UnsupportedOperationException(s"not supported table
change: ${t.getClass}")
}
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