repeatable read

基本解釋

This can be used if the isolation level RR (Repeatable Read) is not used by any programs that operate on the same set of tables.
如果對(duì)同一組表進(jìn)行操作的任何程序都沒有使用隔離級(jí)別 RR（可重復(fù)讀，Repeatable Read），那么就可以使用上述操作。
Notice that the ANSI isolation levels and DB2 isolation levels have different names, and "repeatable read" has different meanings.
請(qǐng)注意，ANSI 隔離級(jí)別和 DB2 隔離級(jí)別使用了不同的名稱，“可重復(fù)的讀取” 也有著不同的含義。
If the value is set to 1, then the optimizer behaves as it does for value 0 if the transaction isolation mode is not Repeatable Read.
如果將其值設(shè)置為 1，那么當(dāng)事務(wù)隔離模式不是可重復(fù)讀（Repeatable Read）時(shí)，優(yōu)化器的行為就與值為 0 時(shí)一樣。