Re: [Maria-developers] implementing index condition pushdown in MariaDB 5.5

On Thu, Feb 14, 2013 at 02:24:57PM -0500, Zardosht Kasheff wrote:

Also, can somebody please explain how handler_index_cond_check checks index conditions? The key function seems to be item->val_int. How does this get each value and check check conditions?

Function handler_index_cond_check() is invoked once for each index tuple. That is, the storage is expected to do something like: while() { read the next index tuple; unpack index columns into their places in table->record[0]; if ((res= handler_index_cond_check()) != ICP_NO_MATCH) { // return either an error or record, depending on the value of res. } } BR Sergei -- Sergei Petrunia, Software Developer Monty Program AB, http://askmonty.org Blog: http://s.petrunia.net/blog