PreDowngradeTableFeatureCommand¶

PreDowngradeTableFeatureCommand is an abstraction of pre-downgrade table feature commands that can removeFeatureTracesIfNeeded.

Sealed Abstract Class

PreDowngradeTableFeatureCommand is a Scala sealed abstract class which means that all of the implementations are in the same compilation unit (a single file).

Contract¶

removeFeatureTracesIfNeeded¶

removeFeatureTracesIfNeeded(
  spark: SparkSession): PreDowngradeStatus

See:

Used when:

ALTER TABLE DROP FEATURE command is executed (and AlterTableDropFeatureDeltaCommand is requested to executeDropFeatureWithCheckpointProtection and executeDropFeatureWithHistoryTruncation)

Implementations¶

CheckConstraintsPreDowngradeTableFeatureCommand
CheckpointProtectionPreDowngradeCommand
ColumnMappingPreDowngradeCommand
CoordinatedCommitsPreDowngradeCommand
DeletionVectorsPreDowngradeCommand
DomainMetadataPreDowngradeCommand
InCommitTimestampsPreDowngradeCommand
MaterializePartitionColumnsPreDowngradeCommand
RedirectReaderWriterPreDowngradeCommand
RedirectWriterOnlyPreDowngradeCommand
RowTrackingPreDowngradeCommand
TypeWideningPreDowngradeCommand
V2CheckpointPreDowngradeCommand
VacuumProtocolCheckPreDowngradeCommand