Add array_product UDF#22703
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| // Empty list -> multiplicative identity. Distinguished here from | ||
| // all-NULL elements (which yield NULL): we have no data either way, | ||
| // but `[]` is structurally a known-empty product, while `[NULL,NULL]` | ||
| // means every value was unknown. | ||
| if len == 0 { | ||
| builder.append_value(1.0); | ||
| continue; | ||
| } |
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What's this behaviour based on? DuckDB seems to output null:
memory D select a, list_product(a) from values ([1]), ([2, 2]), ([1, null]), ([null]), ([]) t(a);
┌───────────┬─────────────────┐
│ a │ list_product(a) │
│ int32[] │ double │
├───────────┼─────────────────┤
│ [1] │ 1.0 │
│ [2, 2] │ 4.0 │
│ [1, NULL] │ 1.0 │
│ [NULL] │ NULL │
│ [] │ NULL │
└───────────┴─────────────────┘
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fixed. matched behaviour with duckDB.
| continue; | ||
| } | ||
|
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| let slice = values.slice(start, len); |
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I don't think a slice here is strictly necessary
Jefffrey
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Jun 2, 2026
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thanks @SubhamSinghal |
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Which issue does this PR close?
Rationale for this change
What changes are included in this PR?
Are these changes tested?
yes using UT
Are there any user-facing changes?
Yes — adds two new SQL scalar functions, array_product and its alias list_product. No API breakage.