The sizelock parameter is used to control the automatic resizing of the primary address space. A sizelock of “0” indicates that a table should be allowed to expand as more rows are entered, and become smaller as rows are deleted. A sizelock of “1” indicates that a table should be allowed to expand, but should not become smaller. This is useful in cases of a presized table, when a preliminary expectation is for the table to hold 1000 rows, but more rows may be added. If a sizelock is set to “2” or more, the table is not allowed to expand or contract. A sizelock of “2” is very important during a select operation executed on a network, when one user is searching a table for information while another user is entering new data.