>But this makes me think of the upcoming virtual column feature. If you >define a virtual table column whose value is equal to >EXPENSIVE_FUNCTION(), do multiple references to that column in a query >cause multiple calls to the function, or is it computed only once per >row?
In the present case this will not help since expensive_function is dependent on a paramter and a table column ... However, at present, a virtual column in a table will be calculated whenever it is used AND/OR a record is stored to the table containing the column, notwithstanding that the column in not stored. For a stored virtual column it will only be calculated when a record is stored. -- The fact that there's a Highway to Hell but only a Stairway to Heaven says a lot about anticipated traffic volume. _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users
