   LONGBLOB

A BLOB column with a maximum length of 4,294,967,295 or
4GB (2^32 - 1) bytes.  Up to MySQL
3.23, the client/server protocol and MyISAM tables had a limit
of 16MB per communication packet / table row. From MySQL 4.0, the maximum
allowed length of LONGBLOB columns depends on the
configured maximum packet size in the client/server protocol and available
memory.
