Dandandan opened a new issue, #22213:
URL: https://github.com/apache/datafusion/issues/22213
### Describe the bug
`to_timestamp` can panic during planning/constant folding for large
`Decimal128` values. The decimal-to-nanoseconds conversion multiplies by a
power of ten without checking for overflow.
### To Reproduce
```sql
EXPLAIN SELECT to_timestamp(
arrow_cast('99999999999999999999999999999999999999', 'Decimal128(38,0)')
);
```
### Actual behavior
```text
thread 'main' panicked at
datafusion/functions/src/datetime/to_timestamp.rs:338:9:
attempt to multiply with overflow
```
### Expected behavior
Return an overflow error instead of panicking.
### Notes
The panic is in `decimal_to_nanoseconds`.
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