[opt](inverted index) Add null document interface to optimize empty string indexing (apache#28661)

Author: qidaye

be/src/olap/rowset/segment_v2/inverted_index_writer.cpp

@@ -229,6 +229,17 @@ class InvertedIndexColumnWriterImpl : public InvertedIndexColumnWriter {
         return Status::OK();
     }
 
+    Status add_null_document() {
+        try {
+            _index_writer->addNullDocument(_doc.get());
+        } catch (const CLuceneError& e) {
+            _dir->deleteDirectory();
+            return Status::Error<ErrorCode::INVERTED_INDEX_CLUCENE_ERROR>(
+                    "CLuceneError add_null_document: {}", e.what());
+        }
+        return Status::OK();
+    }
+
     Status add_nulls(uint32_t count) override {
         _null_bitmap.addRange(_rid, _rid + count);
         _rid += count;
@@ -241,7 +252,7 @@ class InvertedIndexColumnWriterImpl : public InvertedIndexColumnWriter {
 
             for (int i = 0; i < count; ++i) {
                 new_fulltext_field(empty_value.c_str(), 0);
-                RETURN_IF_ERROR(add_document());
+                RETURN_IF_ERROR(add_null_document());
             }
         }
         return Status::OK();