From 8c251d8233e5fc5bc3845d6c59ab986e5de12978 Mon Sep 17 00:00:00 2001
From: Pisarenko Grigoriy <grigoriypisar@ydb.tech>
Date: Mon, 14 Oct 2024 10:07:16 +0300
Subject: [PATCH] YQ-3722 RD fixed verify failed on empty fields (#10351)

---
 .../fq/libs/row_dispatcher/json_filter.cpp    |  4 +--
 ydb/tests/fq/yds/test_row_dispatcher.py       | 28 +++++++++++++++++++
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/ydb/core/fq/libs/row_dispatcher/json_filter.cpp b/ydb/core/fq/libs/row_dispatcher/json_filter.cpp
index d43bc2fbf365..2013d3fb5595 100644
--- a/ydb/core/fq/libs/row_dispatcher/json_filter.cpp
+++ b/ydb/core/fq/libs/row_dispatcher/json_filter.cpp
@@ -4,6 +4,7 @@
 #include <ydb/library/yql/minikql/mkql_alloc.h>
 #include <ydb/library/yql/minikql/computation/mkql_computation_node_holders.h>
 #include <ydb/library/yql/minikql/mkql_terminator.h>
+#include <ydb/library/yql/minikql/mkql_string_util.h>
 
 #include <ydb/core/fq/libs/row_dispatcher/json_filter.h>
 #include <ydb/core/fq/libs/actors/logging/log.h>
@@ -111,8 +112,7 @@ class TFilterInputConsumer : public NYql::NPureCalc::IConsumer<std::pair<ui64, c
 
                 size_t fieldId = 0;
                 for (const auto& column : values.second) {
-                    NYql::NUdf::TStringValue str(column[rowId]);
-                    items[FieldsPositions[fieldId++]] = NYql::NUdf::TUnboxedValuePod(std::move(str));
+                    items[FieldsPositions[fieldId++]] = NKikimr::NMiniKQL::MakeString(column[rowId]);
                 }
 
                 Worker->Push(std::move(result));
diff --git a/ydb/tests/fq/yds/test_row_dispatcher.py b/ydb/tests/fq/yds/test_row_dispatcher.py
index 083d6fa5aa28..61b760f3d98b 100644
--- a/ydb/tests/fq/yds/test_row_dispatcher.py
+++ b/ydb/tests/fq/yds/test_row_dispatcher.py
@@ -285,6 +285,34 @@ def test_filter(self, kikimr, client):
         issues = str(client.describe_query(query_id).result.query.transient_issue)
         assert "Row dispatcher will use the predicate: WHERE (`time` > 101" in issues, "Incorrect Issues: " + issues
 
+    @yq_v1
+    def test_filter_missing_fields(self, kikimr, client):
+        client.create_yds_connection(
+            YDS_CONNECTION, os.getenv("YDB_DATABASE"), os.getenv("YDB_ENDPOINT"), shared_reading=True
+        )
+        self.init_topics("test_filter")
+
+        sql = Rf'''
+            INSERT INTO {YDS_CONNECTION}.`{self.output_topic}`
+            SELECT Cast(time as String) FROM {YDS_CONNECTION}.`{self.input_topic}`
+                WITH (format=json_each_row, SCHEMA (time UInt64 NOT NULL, data String, event String NOT NULL))
+                WHERE data = "";'''
+
+        query_id = start_yds_query(kikimr, client, sql)
+        wait_actor_count(kikimr, "FQ_ROW_DISPATCHER_SESSION", 1)
+
+        data = [
+            '{"time": 101, "event": "event1"}',
+            '{"time": 102, "data": null, "event": "event2"}',
+        ]
+
+        self.write_stream(data)
+        expected = ['101', '102']
+        assert self.read_stream(len(expected), topic_path=self.output_topic) == expected
+
+        wait_actor_count(kikimr, "DQ_PQ_READ_ACTOR", 1)
+        stop_yds_query(client, query_id)
+
     @yq_v1
     def test_filter_use_unsupported_predicate(self, kikimr, client):
         client.create_yds_connection(