DeduplicateCDFDeletes¶

DeduplicateCDFDeletes supports execution of ClassicMergeExecutor to write out merge changes to a target delta table (when there are files to rewrite) with Change Data Feed enabled.

More precisely, DeduplicateCDFDeletes is an input argument of MergeOutputGenerations when requested for the following:

• deduplicateCDFDeletes
• generateCdcAndOutputRows

Creating Instance¶

DeduplicateCDFDeletes takes the following to be created:

• enabled flag
• includesInserts flag

DeduplicateCDFDeletes is created when:

• ClassicMergeExecutor is requested to find files to rewrite

enabled Flag¶

DeduplicateCDFDeletes is given an enabled flag when created based on the following:

• Whether there are multiple matches (hasMultipleMatches)
• enableChangeDataFeed table property

includesInserts Flag¶

DeduplicateCDFDeletes is given an includesInserts flag when created.

includesInserts flag is enabled (true) when a merge command includes WHEN NOT MATCHED THEN INSERT clauses.