HappenLee commented on code in PR #24461:
URL: https://github.com/apache/doris/pull/24461#discussion_r1335560533
##########
be/src/vec/common/columns_hashing.h:
##########
@@ -91,25 +88,31 @@ struct HashMethodString : public
columns_hashing_impl::HashMethodBase<
const IColumn::Offset* offsets;
const UInt8* chars;
+ std::vector<StringRef> keys;
HashMethodString(const ColumnRawPtrs& key_columns, const Sizes&
/*key_sizes*/,
const HashMethodContextPtr&) {
const IColumn& column = *key_columns[0];
const ColumnString& column_string = assert_cast<const
ColumnString&>(column);
offsets = column_string.get_offsets().data();
chars = column_string.get_chars().data();
+
+ keys.resize(column_string.size());
+ for (size_t row = 0; row < column_string.size(); row++) {
+ keys[row] = StringRef(chars + offsets[row - 1], offsets[row] -
offsets[row - 1]);
+ }
}
auto get_key_holder(ssize_t row, [[maybe_unused]] Arena& pool) const {
- StringRef key(chars + offsets[row - 1], offsets[row] - offsets[row -
1]);
-
if constexpr (place_string_to_arena) {
- return ArenaKeyHolder {key, pool};
+ return ArenaKeyHolder {keys[row], pool};
} else {
- return key;
+ return keys[row];
}
}
+ const std::vector<StringRef>& get_keys(size_t rows_number) const { return
keys; }
Review Comment:
the para `rows_number` is useless?
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