Merge pull request #2554 from yandex/issue-2525

Issue 2525

dbms/src/DataStreams/ReplacingSortedBlockInputStream.cpp

@@ -109,7 +109,8 @@ void ReplacingSortedBlockInputStream::merge(MutableColumns & merged_columns, std
     }
 
     /// We will write the data for the last primary key.
-    insertRow(merged_columns, merged_rows);
+    if (!selected_row.empty())
+        insertRow(merged_columns, merged_rows);
 
     finished = true;
 }

dbms/tests/queries/0_stateless/00648_replacing_emtpy_set_from_prewhere.sql

+DROP TABLE IF EXISTS test.final_test;
+CREATE TABLE test.final_test (id String, version Date) ENGINE = ReplacingMergeTree(version, id, 8192);
+INSERT INTO test.final_test (id, version) VALUES ('2018-01-01', '2018-01-01');
+SELECT * FROM test.final_test FINAL PREWHERE id == '2018-01-02';
+DROP TABLE test.final_test;