sparse index
常見例句
- Currently a sparse index can have only one field.
目前,Sparse索引衹能有一個字段。 - Covering indexes allow data storage within the index itself while sparse indexes exclude documents that do not contain the missing field.
?Covered索引允許?在索引本身裡存儲數(shù)據(jù),而 ?Sparse索引則會排除掉不包含索引字段的文檔。 返回 sparse index