TimeTravel¶

TimeTravel is a leaf logical operator (LeafNode) for RESTORE command to time travel the child relation to the given timestamp or version.

Creating Instance¶

TimeTravel takes the following to be created:

• Relation (as a LogicalPlan)
• Timestamp (Expression)
• Version
• Creation Source ID

TimeTravel is created when:

• DeltaSqlAstBuilder is requested to parse RESTORE command
• DeltaTableOperations is requested to executeRestore

Creation Source ID¶

TimeTravel is given a Creation Source ID when created.

The Creation Source ID indicates the API used to time travel:

• sql when DeltaSqlAstBuilder is requested to parse RESTORE command
• deltaTable when DeltaTableOperations is requested to executeRestore

Analysis Phase¶

TimeTravel is resolved to DeltaTimeTravelSpec when DeltaAnalysis logical resolution rule is resolving RestoreTableStatement unary logical operator.