[SPARK-58741][SQL][TESTS] Add nanosecond-timestamp coverage for collect_list - #57964
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[SPARK-58741][SQL][TESTS] Add nanosecond-timestamp coverage for collect_list#57964stevomitric wants to merge 1 commit into
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…ct_list `collect_list` is a type-agnostic aggregate: its `ArrayBuffer` buffer holds the physical `TimestampNanosVal` and the result element type is exactly `child.dataType`. It already works over the nanosecond timestamp types (`TIMESTAMP_NTZ(p)` / `TIMESTAMP_LTZ(p)`, p in [7, 9]) but had no dedicated test coverage. Add an end-to-end test to `TimestampNanosFunctionsSuiteBase` (run in both ANSI modes) asserting that collect_list preserves the input precision and family (NTZ/LTZ) and the sub-microsecond remainder, drops NULLs, and agrees between the SQL and Scala Column API paths. Also add a deterministic golden SQL case (`sort_array(collect_list(...))`) to `timestamp-ntz-nanos.sql` / `timestamp-ltz-nanos.sql`. Test-only; no production change. Co-authored-by: Isaac
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cc @uros-b, @cloud-fan PTAL when you get a chance. |
uros-b
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Aug 12, 2026
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LGTM, thank you @stevomitric! |
cloud-fan
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0 blocking, 0 non-blocking, 0 nits.
The added coverage matches the existing aggregate contract and generated outputs; no code-review findings remain.
Verification
Inspected the complete changed SQL dossiers and Scala test, then traced the claims to CollectList: its result type is ArrayType(child.dataType, ...), its mutable buffer retains copied Catalyst values, and default collection drops nulls. The generated schemas and outputs preserve NTZ/LTZ precision and sub-microsecond values. No tests were run as part of this review.
PR metadata suggestions
- Document the relationship between the PR's SPARK-58741 ticket and the SPARK-56822 identifiers added to test names and comments, or align the identifiers if SPARK-56822 is not the intended umbrella issue.
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@stevomitric Please fix lint issues. |
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What changes were proposed in this pull request?
Add an end-to-end test to
TimestampNanosFunctionsSuiteBase(run in both ANSI modes) asserting that collect_list preserves the input precision and family (NTZ/LTZ) and the sub-microsecond remainder, drops NULLs, and agrees between the SQL and Scala Column API paths. Also add a deterministic golden SQL case (sort_array(collect_list(...))) totimestamp-ntz-nanos.sql/timestamp-ltz-nanos.sql.Why are the changes needed?
Extend test coverage for timestamp nanosecond precision datatype.
Does this PR introduce any user-facing change?
No, test only change
How was this patch tested?
Test-only change.
Was this patch authored or co-authored using generative AI tooling?
Co-Authored-by: Claude Code 4.8