Hi sunfulin, When merging blink, we combed the semantics of all functions at present, and removed a few functions whose semantics are not clearly defined at present. "date_format" should be one of the victim. You can implement your UDF. And you can create a JIRA to support "date_format" too.
Best, Jingsong Lee On Thu, Feb 6, 2020 at 10:32 AM sunfulin <sunfulin0...@163.com> wrote: > Hi, Jingsong > Yep, I'm using blink planner as the following approach. > > *EnvironmentSettings bsSettings = > EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();* > *initPack.tableEnv = > org.apache.flink.table.api.java.StreamTableEnvironment.create(initPack.env, > bsSettings);* > > While running the job, I can see one log from console. > > [main] INFO org.apache.flink.table.module.ModuleManager - Cannot find > FunctionDefinition date_fromat from any loaded modules > > Why Flink cannot load the function definition? From what I can see, Flink > 1.10 with blink-planner shall support this kind of function. > > > > > At 2020-02-04 12:35:12, "Jingsong Li" <jingsongl...@gmail.com> wrote: > > Hi Sunfulin, > > Did you use blink-planner? What functions are missing? > > Best, > Jingsong Lee > > On Tue, Feb 4, 2020 at 12:23 PM Wyatt Chun <wyattc...@gmail.com> wrote: > >> They are two different systems for differentiated usage. For your >> question, why don’t give a direct try on Blink? >> >> Regards >> >> On Tue, Feb 4, 2020 at 10:02 AM sunfulin <sunfulin0...@163.com> wrote: >> >>> As far as I can see, the latest flink version does not have a fullfilled >>> support for blink build-in functions. Many date functions and string >>> functions can not be used in Flink. I want to know that when shall we use >>> flink just as to use blink in the same way. >>> >>> >>> >>> >> > > -- > Best, Jingsong Lee > > > > > -- Best, Jingsong Lee
