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需支持更多的组件 #24

@cmdares

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@cmdares

1、支撑Kafka读取和写入
2、支持主流数据库的Upsert操作,如:Mysql、Postgresql、Oracle
参考:
mysql https://blog.csdn.net/a544258023/article/details/94029334
postgresql https://stackoverflow.com/questions/34643200/spark-dataframes-upsert-to-postgres-table
oracle merge into语法(暂时没有找到相应实现,应该与mysql的实现方式类似)
希望团队可以扩展spark的这块逻辑,支持带有主键的Upsert的应用场景,目前这个需求在实践过程中还是较为常见的。
3、图库(janusgraph 、Neo4j)数据的写入和读取(Gremlin、Cepher)

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