MySQL | Longtext data type support

[eheredia42]

Is MysQL longtext data type support planned?

[eheredia42]

MySQL provides four TEXT types: TINYTEXT, TEXT, MEDIUMTEXT and LONGTEXT.

• TINYTEXT = 255 characters
• TEXT = 64kB (65,535 characters)
• MEDIUMTEXT = 16MB (16,777,215 characters)
• LONGTEXT = 4GB (4,294,967,295 characters)

sqlx fails when trying to read a LONGTEXT field with more than 16 MB of content.

[abonander]

@eheredia42 what is the error you get when trying to decode more than 16 MB of content? It's likely a bug as LONGTEXT should already be supported.

[abonander]

Also, what version of MySQL are you using?

[abonander]

Ah, this is not a LONGTEXT bug. This is because we don't currently handle split packets: https://dev.mysql.com/doc/internals/en/sending-more-than-16mbyte.html

This is unfortunately a duplicate of #189 which is a very old issue. We might get to it at some point.

I suggest avoiding pulling the full content of the column in one query, or otherwise restructuring your query to split the data across multiple rows which should work around the error. It should be possible with a recursive common table expression: https://dev.mysql.com/doc/refman/8.0/en/with.html#common-table-expressions-recursive