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org.apache.spark.sql.delta

FeatureAutomaticallyEnabledByMetadata

sealed trait FeatureAutomaticallyEnabledByMetadata extends AnyRef

A trait indicating this feature can be automatically enabled via a change in a table's metadata, e.g., through setting particular values of certain feature-specific table properties.

When the feature's metadata requirements are satisfied for new tables, or for existing tables when [[automaticallyUpdateProtocolOfExistingTables]] set to `true`, the client will silently add the feature to the protocol's readerFeatures and/or writerFeatures. Otherwise, a proper protocol version bump must be present in the same transaction.

Self Type
FeatureAutomaticallyEnabledByMetadata with TableFeature
Linear Supertypes
AnyRef, Any
Known Subclasses
AppendOnlyTableFeature, ChangeDataFeedTableFeature, CheckConstraintsTableFeature, ColumnMappingTableFeature, CoordinatedCommitsTableFeature, DeletionVectorsTableFeature, GeneratedColumnsTableFeature, IcebergCompatV1TableFeature, IcebergCompatV2TableFeature, IdentityColumnsTableFeature, InCommitTimestampTableFeature, InvariantsTableFeature, RedirectReaderWriterFeature, RedirectWriterOnlyFeature, RowTrackingFeature, TestFeatureWithDependency, TestReaderWriterMetadataAutoUpdateFeature, TestReaderWriterMetadataNoAutoUpdateFeature, TestRemovableLegacyReaderWriterFeature, TestRemovableLegacyWriterFeature, TestRemovableWriterWithHistoryTruncationFeature, TestWriterMetadataNoAutoUpdateFeature, TimestampNTZTableFeature, TypeWideningPreviewTableFeature, V2CheckpointTableFeature, VariantTypeTableFeature
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Abstract Value Members

  1. abstract def metadataRequiresFeatureToBeEnabled(protocol: Protocol, metadata: Metadata, spark: SparkSession): Boolean

    Determine whether the feature must be supported and enabled because its metadata requirements are satisfied.

Concrete Value Members

  1. final def !=(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def automaticallyUpdateProtocolOfExistingTables: Boolean

    Whether the feature can automatically update the protocol of an existing table when the metadata requirements are satisfied.

    Whether the feature can automatically update the protocol of an existing table when the metadata requirements are satisfied. As a rule of thumb, a table feature that requires explicit operations (e.g., turning on a table property) should set this flag to true, while features that are used implicitly (e.g., when using a new data type) should set this flag to false.

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