rok commented on a change in pull request #9841:
URL: https://github.com/apache/arrow/pull/9841#discussion_r609144655
##########
File path: cpp/src/arrow/compute/kernels/scalar_arithmetic.cc
##########
@@ -233,6 +236,104 @@ struct DivideChecked {
}
};
+template <typename T>
+inline T integer_power(KernelContext* ctx, T left, T right) {
+ if (right < 0) {
+ ctx->SetStatus(
+ Status::Invalid("integers to negative integer powers are not
allowed"));
+ }
+ T result = 1;
+ if (left == 0 && right != 0) {
+ return 0;
+ }
+ while (true) {
+ if (right % 2) {
+ result *= left;
Review comment:
Weird - I've set the flag but don't get the overflow error locally,
while [CI
reports](https://github.com/apache/arrow/pull/9841/checks?check_run_id=2292038374#step:8:2054):
```
[ RUN ] TestBinaryArithmeticIntegral/2.Power
/arrow/cpp/src/arrow/compute/kernels/scalar_arithmetic.cc:256:10: runtime
error: signed integer overflow: 2147483647 * 2147483647 cannot be represented
in type 'int'
```
Any tips?
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