HappenLee commented on code in PR #45952:
URL: https://github.com/apache/doris/pull/45952#discussion_r1900388777
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be/src/vec/core/sort_cursor.h:
##########
@@ -264,6 +275,21 @@ struct MergeSortCursor {
return greater_at(rhs, impl->rows - 1, 0) == -1;
}
+ /// Checks that all rows in the current block of this cursor are less than
or equal to all the rows of the current block of another cursor.
+ bool totally_less_or_equals(const MergeSortCursor& rhs) const {
+ if (impl->rows == 0 || rhs.impl->rows == 0) {
+ return false;
+ }
+
+ /// The last row of this cursor is no larger than the first row of the
another cursor.
+ return greater_at(rhs, impl->rows - 1, 0) <= 0;
Review Comment:
why here is first row? maybe pos is faster ?
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