Hi, Berrocal,! On Jul 06, Berrocal, Eduardo wrote: > Hello list (first email here, hopefully sending it to the right address), > I have been trying to solve this problem for a while now, and I am > stuck. I wonder if what I am trying to do is even possible. > > I am implementing a new storage engine which handles engine condition > pushdown. Now, when MariaDB is working on a JOIN using more than one > table (for simplicity, let's assume 2), how can I access the read > records for table 1 when working on a condition pushdown for table 2? > When joining like this: table1.field1 = table2.field1, I can see 2 > Item objects of type FIELD in the condition. However, I can't find > where the read records for table1 are so I can effectively filter > records in table2 by those values.
if f1 is Item_field for table1.field1, then generally f1->field->table->record[0] is the current record for the table1, and f1->field->ptr is the pointer to the field1 value in that currect record > Thanks a lot for your help, > > Eduardo Berrocal García de Carellán > Senior Software Engineer > Intel Corporation | intel.com<http://intel.com/> Regards, Sergei VP of MariaDB Server Engineering and secur...@mariadb.org _______________________________________________ Mailing list: https://launchpad.net/~maria-developers Post to : maria-developers@lists.launchpad.net Unsubscribe : https://launchpad.net/~maria-developers More help : https://help.launchpad.net/ListHelp
