berkaysynnada opened a new issue, #5413:
URL: https://github.com/apache/arrow-datafusion/issues/5413
**Is your feature request related to a problem or challenge? Please describe
what you are trying to do.**
While we can add intervals to timestamp variants (LHS: Timestamp (like
`TimestampSecond`), RHS: Interval (like `IntervalYearMonth`)), we cannot
replace the sides (LHS: Interval, RHS: Timestamp), and get the error
`Err(Internal("Operator + is not implemented for variants
IntervalYearMonth(\"1\") and TimestampSecond(12345678, None)"))`
Addition should be commutative for intervals and timestamps, unlike
subtraction.
**Describe the solution you'd like**
In `impl_op` macro, the match arms can be extended to handle Interval
variants for addition, and an adder function can be implemented.
**Describe alternatives you've considered**
Only the order of the parameters can be changed before calling that
`impl_op` macro since **Timestamp + Interval** operations are working.
**Additional context**
This feature can also be extended to cover operations between interval
variants (`IntervalYearMonth`, `IntervalDayTime`, `IntervalMonthDayNano`). We
can use addition and subtraction operators between them (negatively resulting
situations should be under consideration).
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