Problem reading query results
Posted by: Ken Tozier
Date: January 30, 2011 08:52AM


I wrote a MySQL connector in Objective-C and have been using it for a couple of years on the same machine as the MySQL database, but recently, I wanted to make it work in situations where the connector and database reside on different machines. What I found, is that replies are broken into chunks which need to be reassembled on the client end.

According to the protocol docs for the packet header ( and result packet ( I should be able to calculate the total size of the query result, but that's not what I'm finding.

For queries that are broken up, the header packet always contains a byte length of 1. I tried making sense of the source for MySQLConnector/C++, but there's an awful lot of code there and I can't find exactly where it reads raw bytes from a socket to see how it reassembles multiple packets into a single result set.

Basically, all I need is a way to calculate how many bytes to expect from the server. Does anyone know how to do this?

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Problem reading query results
January 30, 2011 08:52AM

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