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Description
Currently, the protocol parser only supports protocol packets up to 2^24-1 bytes (16 MiB - 1 byte). For example, this means that all columns in a single row can not be bigger than 16 MiB. Having a larger number of rows with smaller rows each is already supported.
Implementation details can be found on https://mariadb.com/kb/en/library/0-packet/#packet-splitting.