DeltaHistoryManager¶

DeltaHistoryManager is used for version and commit history of a delta table.

Creating Instance¶

DeltaHistoryManager takes the following to be created:

• DeltaLog
• Maximum number of keys (default: 1000)

DeltaHistoryManager is created when:

• DeltaLog is requested for one
• DeltaTableOperations is requested to execute history command

Version and Commit History¶

getHistory(
  start: Long,
  end: Option[Long] = None): Seq[CommitInfo]
getHistory(
  limitOpt: Option[Int]): Seq[CommitInfo]

getHistory...FIXME

getHistory is used when:

• DeltaTableOperations is requested to executeHistory (for DeltaTable.history operator)
• DescribeDeltaHistoryCommand is executed (for DESCRIBE HISTORY SQL command)

getCommitInfo Utility¶

getCommitInfo(
  logStore: LogStore,
  basePath: Path,
  version: Long): CommitInfo

getCommitInfo...FIXME

getActiveCommitAtTime¶

getActiveCommitAtTime(
  timestamp: Timestamp,
  canReturnLastCommit: Boolean,
  mustBeRecreatable: Boolean = true,
  canReturnEarliestCommit: Boolean = false): Commit

getActiveCommitAtTime...FIXME

getActiveCommitAtTime is used when:

• DeltaTableUtils utility is used to resolveTimeTravelVersion
• DeltaSource is requested for getStartingVersion