flink SQL函数的相关内容

问答 2023-08-24 来自：开发者社区

Flink SQL sum() over() 函数要3条以上数据才会触发计算吗？

环境说明:flink 1.15 on yarn 模式，消费kafka的数据 sql 如下：select vin,forwardtime,fault_name,fault_value, SUM(1) OVER(PARTITION BY vin,fault_name ORDER BY forwardtime) as rn_sum from temp_vhr_mo...

问答 2023-08-14 来自：开发者社区

flink sql的这个函数怎么用啊？compositeType这个取什么值啊？我用字段名不行!

flink sql的这个函数怎么用啊？compositeType这个取什么值啊？我用字段名不行

问答 2023-08-01 来自：开发者社区

老哥你好，我想问一下，Flink CDC中sql如何获取上一列的数据再做差值？我用的lag()函数但

老哥你好，我想问一下，Flink CDC中sql如何获取上一列的数据再做差值？我用的lag()函数但是会报错？是的，用cdc-mysql获取的数据源

问答 2023-04-23 来自：开发者社区

有人知道flink sql支持JSON_VALUE函数吗？或者将字符串转成json的函数，官网内置函

有人知道flink sql支持JSON_VALUE函数吗？或者将字符串转成json的函数，官网内置函数好像没找到

问答 2023-04-19 来自：开发者社区

请问flink中我写的这样一个sql split函数，返回array类型，这是有什么错么？

请问我写的这样一个sql split函数，返回array类型，这是有什么错么？

问答 2023-03-27 来自：开发者社区

有没有哪位在flink sql中使用过string转json_array的函数？

有没有哪位在flink sql中使用过string转json_array的函数？我现在的场景是从kafka中接入数据写入数据库中，kafka中的数据结构为：{"uuid":"xxxx","body_data":"[{"fild1":123,"fild2":234}]"}，由于body_data是json字符串，shcema为ARRAY>>，现在需要将array拆开每个ROW为1行放入...

问答 2023-02-27 来自：开发者社区

大家在写 flink sql 时候 lead 函数是怎么替代的？

大家在写 flink sql 时候 lead 函数是怎么替代的，流中不是不可以使用lead 函数

问答 2023-01-08 来自：开发者社区

flink cdc DataStream 如何实现 sql 的 DATE_FORMAT 函数？

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更新时间 2024-06-12 18:59:14

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