使用场景如下，将kafka源表通过flink sql处理成mongodb汇表存入。按照班级进行group by，输出对应班级所有的学生数据集合。请问用flink sql自带的collect函数能实现吗？如果能的话要怎么写sql? 如果不能的话要怎么写UDAF，有例子参考吗？谢谢！ kafka源表： ...

大家有用Flink SQL中的collect函数执行的结果用DataStream后，用什么数据匹配

大家有用Flink SQL中的collect函数执行的结果用DataStream后，用什么数据类型匹配该字段的结果，数据类型的类名和需要的依赖是什么？ *来自志愿者整理的flink邮件归档

flink sql聚合后collect收集数据问题

源表三个字段 name, color, ts 按时间窗口聚合后想根据name group by取colors数组 create table source_table ( name STRING, color STRING, ts TIMESTAMP, WATERMARK ts for ts ) cr...

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立即开通

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实时同步

MySQL 到 Hologres

Kafka 到 Hologres

功能对比

开源Flink对比

成本优化

作业自动调优