flink table over 窗口报错是什么原因？

Hi！ order by 的字段是 f_time_bak，但是 watermark 的字段是 f_time，这两个不一致。 yanyunpeng ya...@rockontrol.com 于2021年8月4日周三 下午2:30写道： > 代码如下： > EnvironmentSettings bbSettings = > EnvironmentSettings.newInstance().useBlinkPlanner().inBatchMode().build(); > TableEnvironment tableEnv = TableEnvironment.create(bbSettings); > tableEnv.executeSql("CREATE TABLE t_yyp_test (\n" + > " f_id INT,\n" + > " f_h STRING,\n" + > " f_l STRING,\n" + > " f_j STRING,\n" + > " f_value DOUBLE,\n" + > " f_time TIMESTAMP(3)\n, " + > " f_time_bak TIMESTAMP(3)\n, " + > " PRIMARY KEY (f_id) NOT ENFORCED,\n" + > " WATERMARK FOR f_time AS f_time \n" + > ") WITH (\n" + > " 'connector' = 'jdbc',\n" + > " 'url' = 'jdbc:mysql://**',\n" + > " 'table-name' = '123',\n" + > " 'username' = '123',\n" + > " 'password' = '123'\n" + > ")"); > tableEnv.registerFunction("GaussianFunction", new GaussianFunction()); > Table table = tableEnv > .from("t_yyp_test") > .window(Over.partitionBy($("f_h"), $("f_l"), $("f_j")) > .orderBy($("f_time_bak")) > .preceding("unbounded_range") > .following(CURRENT_RANGE) > .as("w")) > .select($("f_h"), > $("f_l"), > $("f_j"), > $("f_value").avg().over($("w")), > $("f_value").varPop().over($("w")), > $("f_value").stddevPop().over($("w"))); > > > 已经定义了eventTime 使用eventTIme或者别的时间字段排序都报错 > > > Exception in thread "main" org.apache.flink.table.api.ValidationException: > Ordering must be defined on a time attribute. > > > 请问这是什么原因来自志愿者整理的flink邮件归档