data distribution path
常見例句
- Without column data-value distribution information in the catalog, DB2 will assume an even distribution of values, which may lead the optimizer to a sub-optimal access path.
如果編目中沒有列數(shù)據(jù)值分布信息,DB2 就會假設(shè)值是均勻分布的,這可能導致優(yōu)化器選擇非最優(yōu)的訪問路徑。 - Without correct column distribution statistics, DB2 may not have enough information to make the best choice when choosing an access path to the data—especially if data is heavily skewed.
在選擇數(shù)據(jù)的訪問路徑時,如果沒有正確的列分布統(tǒng)計數(shù)據(jù),DB2 可能沒有足夠的信息來做出最佳的選擇,尤其是如果數(shù)據(jù)出現(xiàn)嚴重誤差。 返回 data distribution path