fix(reader): Equality delete files with partial schemas (containing only equality columns) #1782
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…lity delete files. Added new test.
mbutrovich
changed the title
evolve_schema() call in load_file_for_task() for equality deletes
mbutrovich
added a commit
to mbutrovich/iceberg-rust
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Oct 27, 2025
|
Seems duplicated with #1778 ? |
I mistakenly mixed changes from the two PRs, but they are independent (but related) fixes with independent tests. |
liurenjie1024
approved these changes
Nov 4, 2025
|
The ci failure is unrelated, it should be fixed by #1823. I'll merge this for now. |
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What issue does this PR close?
Partially address #1749.
Rationale for this change
Equality delete files with partial schemas (containing only equality columns) were hitting Arrow validation errors: "Column 'id' is declared as non-nullable but contains null values” in Iceberg Java’s TestSparkReaderDeletes suite. The bug occurs because
evolve_schema()adds missing columns with NULL values, which fails when those columns are declared REQUIRED in the table schema.What changes are included in this PR?
Change the
evolve_schema()call to takeequality_idsbecause per the Iceberg spec, evolve schema for equality deletes but only for theequality_idscolumns, not all table columns.Are these changes tested?
test_partial_schema_equality_deletes_evolve_succeeds