Hello > For example a query > “SELECT song_id FROM songs WHERE author_id = 3” > corresponds to a vector (*,3). > [...] > you can put “?” in place of a number. > For example, if your original vector was (*,3), then it results in two vectors: (*,?) and the original DEFINE: ALL_NUMBERS_GENERATE_WILDCARD
> When you perform a write query B, determine its subspace. > a) you can put “?” in place of “*” > b) you can put “*” in place of any number > For example for a subspace (*,3) you’ll end up with four variants: (*,3),(?,3),(*,*),(?,*). 1. I need example for (?,3) but I don't understand expression 'any number' Example query: DELETE FROM songs WHERE song_id < 100 AND author_id = 3 If result is (?,3),(*,3),(?,*),(*,*) then '?' are logically simmilar to '*' but DEFINED(ALL_NUMBERS_GENERATE_WILDCARD) AND 'you can put “?” in place of “*”' Simply: DELETE '*' => WILDCARD -> inc revision SELECT NUMBER => WILDCARD -> check revision And we have to clear all cache from table if we change multiple rows Please answer, maybe I don't understand something -- --- You received this message because you are subscribed to the Google Groups "memcached" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/groups/opt_out.
