Merge pull request #18358 from ClickHouse/backport/20.11/18211

Backport #18211 to 20.11: ISSUES-18186 fix unique key convert crash

src/Interpreters/MySQL/InterpretersMySQLDDLQuery.cpp

@@ -200,10 +200,10 @@ static inline std::tuple<NamesAndTypesList, NamesAndTypesList, NamesAndTypesList
                 keys->arguments->children.insert(keys->arguments->children.end(),
                     index_columns->children.begin(), index_columns->children.end());
             else if (startsWith(declare_index->index_type, "UNIQUE_"))
-                unique_keys->arguments->children.insert(keys->arguments->children.end(),
+                unique_keys->arguments->children.insert(unique_keys->arguments->children.end(),
                     index_columns->children.begin(), index_columns->children.end());
             if (startsWith(declare_index->index_type, "PRIMARY_KEY_"))
-                primary_keys->arguments->children.insert(keys->arguments->children.end(),
+                primary_keys->arguments->children.insert(primary_keys->arguments->children.end(),
                     index_columns->children.begin(), index_columns->children.end());
         }
     }

src/Interpreters/MySQL/tests/gtest_create_rewritten.cpp

@@ -193,3 +193,15 @@ TEST(MySQLCreateRewritten, RewrittenQueryWithPrefixKey)
         "ReplacingMergeTree(_version) PARTITION BY intDiv(key, 4294967) ORDER BY (key, prefix_key)");
 }
 
+TEST(MySQLCreateRewritten, UniqueKeysConvert)
+{
+    tryRegisterFunctions();
+    const auto & context_holder = getContext();
+
+    EXPECT_EQ(queryToString(tryRewrittenCreateQuery(
+        "CREATE TABLE `test_database`.`test_table_1` (code varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,name varchar(255) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL,"
+        " id bigint NOT NULL AUTO_INCREMENT, tenant_id bigint NOT NULL, PRIMARY KEY (id), UNIQUE KEY code_id (code, tenant_id), UNIQUE KEY name_id (name, tenant_id))"
+        " ENGINE=InnoDB AUTO_INCREMENT=100 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;", context_holder.context)),
+        "CREATE TABLE test_database.test_table_1 (`code` String, `name` String, `id` Int64, `tenant_id` Int64, `_sign` Int8() MATERIALIZED 1, `_version` UInt64() MATERIALIZED 1)"
+        " ENGINE = ReplacingMergeTree(_version) PARTITION BY intDiv(id, 18446744073709551) ORDER BY (code, name, tenant_id, id)");
+}