Package io.delta.kernel.internal.checksum

Class ChecksumUtils

Object

io.delta.kernel.internal.checksum.ChecksumUtils

public class ChecksumUtils
extends Object

Utility methods for computing and writing checksums for Delta tables.

Method Summary

Modifier and Type	Method	Description
static void	computeStateAndWriteChecksum(Engine engine, LogSegment logSegmentAtVersion)	Computes the state of a Delta table and writes a checksum file for the provided snapshot's version.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

computeStateAndWriteChecksum

public static void computeStateAndWriteChecksum(Engine engine,
 LogSegment logSegmentAtVersion)
                                         throws IOException

Computes the state of a Delta table and writes a checksum file for the provided snapshot's version. If a checksum file already exists for this version, this method returns without any changes.

The checksum file contains table statistics including:

• Total table size in bytes
• Total number of files
• File size histogram
• Domain metadata information

Note: For very large tables, this operation may be expensive as it requires scanning the table state to compute statistics.

Parameters:

engine - The Engine instance used to access the underlying storage

logSegmentAtVersion - The LogSegment instance of the table at a specific version

Throws:

IOException - If an I/O error occurs during checksum computation or writing