dict2 test mysql1 3306 root clickhouse test2 true true id UInt32 CAST(id AS UNSIGNED) id Int32 value String (UNDEFINED) 0 dict3 test mysql1 3306 root clickhouse test3 true true id UInt32 CAST(id AS UNSIGNED) id Int32 value String (UNDEFINED) 0 dict4 test mysql1 3306 root clickhouse test4 true true id UInt32 CAST(id AS UNSIGNED) id Int32 value String (UNDEFINED) 0