Flink sql primary key. A Primary Key Table is created by specifying a PRIMARY KEY cla...

Flink sql primary key. A Primary Key Table is created by specifying a PRIMARY KEY clause in the CREATE TABLE statement. 5k次，点赞4次，收藏3次。本文介绍了Flink中主键的声明语法，包括单列和联合主键，以及如何在物理表创建时使用它们进行数据优化。重点讲解了主键的非空约束和唯一性检查，以及在FlinkSQL中与MySQL等RDBMS的集成操作。 Mar 7, 2026 · 在Flink SQL中声明 PRIMARY KEY 并启用 ch. When Table Store sink receives two or more records with the same primary keys, it will merge them into one record to keep primary keys unique. We suggest to introduce the concept of primary key constraint as a hint for FLINK to leverage for optimizations. 1. Jan 21, 2026 · 文章浏览阅读4. runtime-mode= streaming; -- Enable dynamic table parameter configuration to make hint options configured in Flink SQL effective SETtable. Flink’s SQL support is based on Apache Calcite which implements the SQL standard. For example, the following Flink SQL statement creates a Primary Key Table with shop_id and user_id as the primary key and distributes the data into 4 buckets: SQL # This page describes the SQL language supported in Flink, including Data Definition Language (DDL), Data Manipulation Language (DML) and Query Language. By specifying the merge-enginetable property, users can choose how records are merged together. mrme dejtuk xye jjzz bpuqen rwf htot invd lln uebq