diff --git a/src/Common/parseRemoteDescription.cpp b/src/Common/parseRemoteDescription.cpp
index 6bb1186bfea..477f5e0f250 100644
--- a/src/Common/parseRemoteDescription.cpp
+++ b/src/Common/parseRemoteDescription.cpp
@@ -181,7 +181,7 @@ std::vector<std::pair<String, uint16_t>> parseRemoteDescriptionForExternalDataba
         size_t colon = address.find(':');
         if (colon == String::npos)
         {
-            LOG_WARNING(&Poco::Logger::get("ParseRemoteDescription"), "Port is not found for host: {}. Using default port {}", default_port);
+            LOG_WARNING(&Poco::Logger::get("ParseRemoteDescription"), "Port is not found for host: {}. Using default port {}", address, default_port);
             result.emplace_back(std::make_pair(address, default_port));
         }
         else
diff --git a/src/Databases/MySQL/FetchTablesColumnsList.cpp b/src/Databases/MySQL/FetchTablesColumnsList.cpp
index 07e0e75dd9b..cfd01d4ddc4 100644
--- a/src/Databases/MySQL/FetchTablesColumnsList.cpp
+++ b/src/Databases/MySQL/FetchTablesColumnsList.cpp
@@ -72,11 +72,15 @@ std::map<String, NamesAndTypesList> fetchTablesColumnsList(
              " IS_NULLABLE = 'YES' AS is_nullable,"
              " COLUMN_TYPE LIKE '%unsigned' AS is_unsigned,"
              " CHARACTER_MAXIMUM_LENGTH AS length,"
-             " NUMERIC_PRECISION as '',"
+             " NUMERIC_PRECISION as numeric_precision,"
              " IF(ISNULL(NUMERIC_SCALE), DATETIME_PRECISION, NUMERIC_SCALE) AS scale" // we know DATETIME_PRECISION as a scale in CH
              " FROM INFORMATION_SCHEMA.COLUMNS"
-             " WHERE TABLE_SCHEMA = " << quote << database_name
-          << " AND TABLE_NAME IN " << toQueryStringWithQuote(tables_name) << " ORDER BY ORDINAL_POSITION";
+             " WHERE ";
+
+    if (!database_name.empty())
+        query << " TABLE_SCHEMA = " << quote << database_name << " AND ";
+
+    query << " TABLE_NAME IN " << toQueryStringWithQuote(tables_name) << " ORDER BY ORDINAL_POSITION";
 
     StreamSettings mysql_input_stream_settings(settings);
     MySQLBlockInputStream result(pool.get(), query.str(), tables_columns_sample_block, mysql_input_stream_settings);
diff --git a/src/Storages/StorageMySQL.cpp b/src/Storages/StorageMySQL.cpp
index bc07679a0de..35eb85e41d2 100644
--- a/src/Storages/StorageMySQL.cpp
+++ b/src/Storages/StorageMySQL.cpp
@@ -146,7 +146,9 @@ public:
     {
         WriteBufferFromOwnString sqlbuf;
         sqlbuf << (storage.replace_query ? "REPLACE" : "INSERT") << " INTO ";
-        sqlbuf << backQuoteMySQL(remote_database_name) << "." << backQuoteMySQL(remote_table_name);
+        if (!remote_database_name.empty())
+            sqlbuf << backQuoteMySQL(remote_database_name) << ".";
+        sqlbuf << backQuoteMySQL(remote_table_name);
         sqlbuf << " (" << dumpNamesWithBackQuote(block) << ") VALUES ";
 
         auto writer = FormatFactory::instance().getOutputStream("Values", sqlbuf, metadata_snapshot->getSampleBlock(), storage.getContext());
diff --git a/src/TableFunctions/TableFunctionMySQL.cpp b/src/TableFunctions/TableFunctionMySQL.cpp
index e2eb2511409..7d3fca58451 100644
--- a/src/TableFunctions/TableFunctionMySQL.cpp
+++ b/src/TableFunctions/TableFunctionMySQL.cpp
@@ -83,12 +83,17 @@ ColumnsDescription TableFunctionMySQL::getActualTableStructure(ContextPtr contex
 
     const auto columns = tables_and_columns.find(remote_table_name);
     if (columns == tables_and_columns.end())
-        throw Exception("MySQL table " + backQuoteIfNeed(remote_database_name) + "." + backQuoteIfNeed(remote_table_name) + " doesn't exist.", ErrorCodes::UNKNOWN_TABLE);
+        throw Exception("MySQL table " + (remote_database_name.empty() ? "" : (backQuote(remote_database_name) + "."))
+            + backQuote(remote_table_name) + " doesn't exist.", ErrorCodes::UNKNOWN_TABLE);
 
     return ColumnsDescription{columns->second};
 }
 
-StoragePtr TableFunctionMySQL::executeImpl(const ASTPtr & /*ast_function*/, ContextPtr context, const std::string & table_name, ColumnsDescription /*cached_columns*/) const
+StoragePtr TableFunctionMySQL::executeImpl(
+    const ASTPtr & /*ast_function*/,
+    ContextPtr context,
+    const std::string & table_name,
+    ColumnsDescription /*cached_columns*/) const
 {
     auto columns = getActualTableStructure(context);