[Mariadevelopers] Doubts about index and optimization
Hi guys i have two doubts... First the rtree index Could i index two integer or float or decimal columns using rtree And queries like X>=1 and x<=2 and y>=1 and y<=2 Be optimized using rtree? Another doubt... i dont have a mariadb now to test, i'm in cellphone... this kind of query is optimized if i have a x,y btree index? Btree will use x only, or x and y? Second doubt I'm thinking about enum rewrite optimzation and i didn't write anything yet, just studying mariadb code... When using queries like this Where x<=5 Or where x>=5 Or without = part Does mysql know what's the max and min value of x, and rewrite it to something X<=5. To. X in (0,1,2,3,4,5) when x is a integer for example and min(x)=0 I'm thinking about this, in conditions like the rtree optimization, example... we could optimize x and y with something like X>1 and x<5 and y>1 and y<5 to X in (2,3,4) and y in (2,3,4) It's something like enum optimization but using integers and max min informations Well i don't know the full code but i didn't found this information (i don't remember at least) Anyone know something about this in source? If not i will consider this optimization when doing the enum optimization (i don't remember the mdev number now, but anyone interested in this optimization can search in jira and find it, i reported and done any job yet just the raw and high implementation idea) Thanks guys
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Roberto Spadim