csun5285 commented on code in PR #27764:
URL: https://github.com/apache/doris/pull/27764#discussion_r1413788509
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be/src/olap/tablet_schema.cpp:
##########
@@ -1019,6 +1019,23 @@ bool TabletSchema::is_dropped_column(const TabletColumn&
col) const {
column(col.name()).unique_id() != col.unique_id();
}
+void TabletSchema::copy_extracted_columns(const TabletSchema& src_schema) {
+ std::unordered_set<int32_t> variant_columns;
+ for (const auto& col : columns()) {
+ if (col.is_variant_type()) {
+ variant_columns.insert(col.unique_id());
+ }
+ }
+ for (const TabletColumn& col : src_schema.columns()) {
+ if (col.is_extracted_column() &&
variant_columns.contains(col.parent_unique_id())) {
+ ColumnPB col_pb;
+ col.to_schema_pb(&col_pb);
+ TabletColumn new_col(col_pb);
+ append_column(new_col, ColumnType::VARIANT);
Review Comment:
The added columns here are all extracted from variants, such as v.id. They
will only be duplicated if the user adds a column with the same name, like v.id.
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