amorynan commented on code in PR #15966:
URL: https://github.com/apache/doris/pull/15966#discussion_r1082016577
##########
be/src/olap/field.h:
##########
@@ -450,6 +451,29 @@ uint32_t Field::hash_code(const CellType& cell, uint32_t
seed) const {
return _type_info->hash_code(cell.cell_ptr(), seed);
}
+class MapField : public Field {
+public:
+ explicit MapField(const TabletColumn& column) : Field(column) {}
+
+ void consume(RowCursorCell* dst, const char* src, bool src_null, MemPool*
mem_pool,
+ ObjectPool* agg_pool) const override {
+ dst->set_is_null(src_null);
+ if (src_null) {
+ return;
+ }
+ _type_info->deep_copy(dst->mutable_cell_ptr(), src, mem_pool);
+ }
+
+ // make variable_ptr memory allocate to cell_ptr as MapValue
+ char* allocate_memory(char* cell_ptr, char* variable_ptr) const override {
+ return variable_ptr + _length;
+ }
+
+ size_t get_variable_len() const override {
+ return _length;
Review Comment:
_length just means variable for field , and here is row-based code ....
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