emqx/changes/ee/feat-13172.en.md

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Added a rule function `map_to_redis_hset_args` to help preparing redis HSET (or HMSET) multi-fields values.
For example, if `payload.value` is a map of multiple data fields,
this rule `SELECT map_to_redis_hset_args(payload.value) as hset_fields FROM "t/#"` can prepare `hset_fields`
for redis action to render the command template like `HMSET name1 ${hset_fields}`.