DescribeDeltaHistoryCommand is used for DESCRIBE HISTORY SQL command.
DescribeDeltaHistoryCommand takes the following to be created:
- (optional) Directory
- (optional) Number of commits to display
- Output Attributes (default: CommitInfo)
DescribeDeltaHistoryCommand is created for:
run( sparkSession: SparkSession): Seq[Row]
run is part of the
RunnableCommand (Spark SQL) abstraction.
run creates a Hadoop
Path to (the location of) the delta table (based on DeltaTableIdentifier).
run creates a DeltaLog for the delta table.