RocketMQ Message Filtering Explained

RocketMQ message filtering can be achieved by using SQL expressions. Within the configuration of RocketMQ message producers and consumers, one can set a message filtering expression to filter messages. Producers can mark messages by setting the tags attribute, and consumers can consume only messages that match the set filtering expression. Filtering expressions can utilize SQL syntax for matching, for example:

TAGS = 'TagA' // 匹配tag为TagA的消息

By setting message filter expressions, you can consume only messages that meet certain conditions, improving consumption efficiency.