The present in my RSS feed this morning was an article by Peter
Zaitsev on :
http://www.mysqlperformanceblog.com/2009/09/20/guidance-for-mysql-optimizer-developers/
One of the changes made recently to Drizzle, is a redesign of our executioner.
This was done by Padraig. MySQL inherited a design where the parser
uses one Global Lex Structure to fill in the members of the query
for later use. This structure has members in it for every form of
query that can be executed. The structure is also assigned an
ENUM that will be used later for determining if the query is a
SELECT, INSERT, etc... via a switch/case dispatcher.
This of course creates a number of limitations in the design,
especially for Drizzle …
Showing entries 1 to 1
Sep
21
2009
Showing entries 1 to 1