… as if you can’t build efficient indexes so selectivity is done by index and index used to resolve order by. Funny enough… be used with other databases which may be slower than MySQL. MySQL Make it so one would not need to use sphinx… kind of queries. This includes parallel processing, fast count(*) and bitmap indexes to help non selective clauses. Also some form of fast…
Post: Data mart or data warehouse?
July 15, 2010 By 13 Comments
… the performance of OLAP with and without aggregation over multiple MySQL storage engines at various data scales. What is a data… in large part because commercial database software supports hash joins, bitmap indexes, table partitioning, parallel query execution, clustered tables and materialized views… much easier than it may be on MySQL, but it is definitely possibly to use MySQL as long as the right tools…
Comment: Multiple column index vs multiple indexes
November 18, 2010 By 13 Comments
… is the best practice from performance point of view to index enumerations/chars If you have a lot of flags like… actually writing property selling site 
Mysql does not have bitmap indexes as far as i know and creating index with all of them does…
Comment: Using delayed JOIN to optimize count(*) and LIMIT queries
April 16, 2007 By 22 Comments
…” and “lower” characters ! Yes I often use this too, in MySQL and in Postgres, it is just one of the tricks… BEFORE sorting them. Postgres will bitmap-index-scan on a boolean OR/AND mix of my indexes so it will never even look… trick if you need ! It works very very well with MySQL too.
Comment: Indexes in MySQL
March 5, 2010 By 27 Comments
Santiago, In simple answer – no, MySQL does not have bitmap indexes.
Comment: Using Sphinx as MySQL data retrieval accelerator
August 22, 2008 By 25 Comments
Is there something like bitmap indexes in MySQL ? And if not, why have they not implemented such a great feature?
Comment: Indexes in MySQL
March 5, 2010 By 27 Comments
… 500 properties, my selectivity is about 0,006, then a index wouldn’t be a good choice. But i still want… id IN SpecialProps”, and then, the ID Primary Key, Unique Index would be use. But, in this case, doing so, i… directly. So, to finalize this comment, a simple question. Does MySQL have any index like the BitMap from Oracle? Thank you very much!
