1. A computer-implemented method for minimizing join operation processing time within a database system based on estimated joined table spread of the database system, the computer implemented method comprising the steps of: estimating, by one or more processors, value distribution of data in a joined table, wherein the joined table is a result of join operation between two instances of tables of a database system; determining, by the one or more processors, boundaries for partitioning at least one range of attributes of the estimated value distribution, wherein the boundaries for partitioning at least one range of attributes of the estimated value distribution corresponds to a same number of rows of the joined table; and determining, by the one or more processors, at least one assignment of the determined partition of the at least one range of attributes to processing units of the database system.