Used to constrain the considered lock granularities for an index 用于约束经过考虑的索引锁粒度。
2.
Lock granularity and hierarchies 锁粒度和层次结构
3.
The database engine can dynamically choose the level of lock granularity based on the optimizer s estimate of the number of rows a transact - sql statement will reference 数据库引擎可以根据优化器估计的transact - sql语句可能引用的行数，动态地选择锁粒度级别。
