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Javier de la Torreanduser.email
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* iceberg maintenance: apply equality deletes only to older data files in their partition
Compaction applied every equality-delete key to every data file of every
bin. The Iceberg spec ("Scan Planning") applies an equality delete file only
to data files with a strictly lower data sequence number, and only to data
files in the delete file's own partition unless its spec is unpartitioned.
An upsert writer (Flink, the Iceberg Kafka Connect sink, CDC tools) commits
an update as the row's new version plus an equality delete of its key in the
same commit, so the compaction deleted both the old and the new version of
every updated row.
- equalityDeleteGroup is keyed by equality field ids and scope (unpartitioned,
or spec id plus partition) and keeps, per key, the highest data sequence
number of the delete files carrying it. A delete file without a data
sequence number is an error rather than a guess.
- Partition values are compared typed through the spec's partition type, so
one partition decoded in different Go shapes (a uuid as uuid.UUID or
[16]byte, a long as int32 or int64, a null present or missing) is one
partition. A spec whose fields are all void is unpartitioned. A delete whose
scope cannot be decided (unknown spec, no partition values under a
partitioned spec, a value that does not convert) stops the compaction; a bin
whose own partition cannot be typed while a delete of its spec exists is
not compacted.
- Each bin is merged with only the groups that apply to its partition, and a
row is deleted only by a key whose sequence number is higher than its data
file's.
- A where filter no longer drops unpartitioned delete files (the clause's
field is not in their spec), which let deleted rows return in a filtered
compaction.
Tests: the table fixture now commits its delete files after the data (data
sequence number 1, deletes 2), as writers do; hand-built entries in the unit
tests get sequence numbers. New eqdelete_sequence_test.go covers rows written
with and after their delete, partition scope, unpartitioned and all-void
specs, typed partition matching, missing sequence numbers and partition
values, where filters, and group-key collisions.
* iceberg maintenance: split the undecidable-scope branch in deleteInPredicateScope
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Co-authored-by: user.email <chrislusf@users.noreply.github.com>