Rename TypeSignature::NullAry --> TypeSignature::Nullary and improve comments
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This was referenced Dec 17, 2024
findepi
reviewed
Dec 17, 2024
| @@ -74,6 +74,8 @@ pub enum Volatility { | |||
| /// adds a cast such as `cos(CAST int_column AS DOUBLE)` during planning. | |||
| /// | |||
| /// # Data Types | |||
| /// | |||
| /// ## Timestamps | |||
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should there be one empty line after a header?
findepi
approved these changes
Dec 17, 2024
| Coercible(Vec<TypeSignatureClass>), | ||
| /// The arguments will be coerced to a single type based on the comparison rules. | ||
| /// For example, i32 and i64 has coerced type Int64. | ||
| /// One or more arguments that can be "compared" |
| /// | ||
| /// Note: | ||
| /// - If compares with numeric and string, numeric is preferred for numeric string cases. For example, nullif('2', 1) has coerced types Int64. | ||
| /// - If compares with numeric and string, numeric is preferred for numeric string cases. For example, `nullif('2', 1)` has coerced types `Int64`. |
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is the reader expected to know/assume that nullif uses signature "Comparable"?
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actual example direct reader to understand this easily
| /// | ||
| /// # Examples | ||
| /// Function `make_array` takes 0 or more arguments with arbitrary types, its `TypeSignature` | ||
| /// | ||
| /// Since `make_array` takes 0 or more arguments with arbitrary types, its `TypeSignature` | ||
| /// is `OneOf(vec![Any(0), VariadicAny])`. |
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This IMO is wrong design of those signatures, but whatever (for now)
| /// For example, if a function is called with (utf8, large_utf8), all | ||
| /// arguments will be coerced to `LargeUtf8` | ||
| /// | ||
| /// For functions that take no arguments (e.g. `random()` see [`TypeSignature::Nullary`]). |
jayzhan211
approved these changes
Dec 18, 2024
|
Thanks @alamb |
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Which issue does this PR close?
Signature::nullaryin 44.0.0 easier / less confusing #13763Rationale for this change
While I was making that change I noticed that the
TypeSignaturedocumentation could be improved as well so I did it at the same timeWhat changes are included in this PR?
TypeSignature::NullAry-->TypeSignature::NullaryAre these changes tested?
By CI
Are there any user-facing changes?
The name of an enum has changed, but this has not yet been released, so it isn't a user visible change in my mind