DeltaScan¶

Creating Instance¶

DeltaScan takes the following to be created:

• Version
• AddFiles
• Total DataSize
• Partition DataSize
• Scanned DataSize
• Partition filters (ExpressionSet)
• Data filters (ExpressionSet)
• Unused filters (ExpressionSet)
• Projection (AttributeSet)
• Scan duration (in millis)
• DeltaDataSkippingType

DeltaScan is created when:

• PartitionFiltering is requested for the files to scan
• DataSkippingReaderBase is requested for the files to scan

PreparedDeltaFileIndex¶

DeltaScan is used to create a PreparedDeltaFileIndex.

All Filters¶

allFilters: ExpressionSet

allFilters is a collection of the partitionFilters, the dataFilters, and the unusedFilters.

allFilters is used when:

• PreparedDeltaFileIndex is requested for the matching data files