[SPARK-59411][SQL] Support the TIME data type in the width_bucket function - #58706
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[SPARK-59411][SQL] Support the TIME data type in the width_bucket function#58706stevomitric wants to merge 1 commit into
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…ction `width_bucket` accepted DOUBLE and interval (year-month / day-time) operands but rejected TIME. TIME is physically a Long (nanoseconds since midnight), so it slots into the existing double-based bucket math the same way the Long-backed day-time interval does: - Add `AnyTimeType` to the three value/min/max `TypeCollection`s. - Accept `(TIME, TIME, TIME)` in `checkInputDataTypes` (allowing mixed precisions, like the interval cases); operands are compared on the shared nanos-of-day value. No change to `computeBucketNumber` / eval / codegen: operands already flow through `Number.doubleValue()` (interpreted) and long->double widening (codegen). Tests: `MathExpressionsSuite` unit cases and golden cases in `time.sql` (bucket edges, reversed range, mixed precision, and null/degenerate inputs). Co-authored-by: Isaac <no-reply@databricks.com>
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What changes were proposed in this pull request?
Make
width_bucketaccept the TIME data type. It already supports DOUBLE and interval (year-month / day-time) operands. This PR adds TIME, which is physically a Long (nanoseconds since midnight) and reuses the existing double-based bucket math (no eval/codegen change).Mixed TIME precisions are allowed and compared on the shared nanos-of-day value.
Why are the changes needed?
DATE/TIMESTAMP get equiwidth bucketing through intervals, but a TIME column could not be bucketed (e.g. bucketing event times across a 09:00–17:00 workday).
Does this PR introduce any user-facing change?
Yes.
width_bucket(TIME'12:00:00', TIME'09:00:00', TIME'17:00:00', 8)now returns 4 instead of raising an error.How was this patch tested?
MathExpressionsSuiteunit cases and golden cases intime.sql(bucket edges, reversed range, mixed precision, and null/degenerate inputs).Was this patch authored or co-authored using generative AI tooling?
Co-Authored-By: Claude Opus 4.8