MINOR: [C++] Fix a typo in Acero agg description (#37031)

### Rationale for this change ### What changes are included in this PR? fix acero agg node typo ### Are these changes tested? ### Are there any user-facing changes? Authored-by: SGZW <[email protected]> Signed-off-by: Sutou Kouhei <[email protected]>
apache · Aug 7, 2023 · 3bb13da · 3bb13da
1 parent 311e866
commit 3bb13da
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/cpp/src/arrow/acero/aggregate_internal.h b/cpp/src/arrow/acero/aggregate_internal.h
@@ -52,7 +52,7 @@
 // segment-keys is used to refine the partitioning. However, segment-keys are different in
 // that they partition only consecutive rows into a single group. Such a partition of
 // consecutive rows is called a segment group. For example, consider a column X with
-// values [A, A, B, A] at row-indices [0, 1, 2]. A regular group-by aggregation with keys
+// values [A, A, B, A] at row-indices [0, 1, 2, 3]. A regular group-by aggregation with keys
 // [X] yields a row-index partitioning [[0, 1, 3], [2]] whereas a segmented-group-by
 // aggregation with segment-keys [X] yields [[0, 1], [2], [3]].
 //