TfrDBDataSet是一个非可视控件,用于使用像First,Next和Prior方法遍历整个数据源。类似于ReportBuilder的TppBDEPipeline控件,但只能用导航而不能提供字段数据给予报表。 这个控件的DataSet属性连接到一个像Ttable或Tquery这样的TdataSet控件。设置OpenDataSource和CloseDataSource为True,用于自动打开或关闭相关数据集。 RangeBegin...
TfrDBDataSet是一个非可视控件,用于使用像First,Next和Prior方法遍历整个数据源。类似于ReportBuilder的TppBDEPipeline控件,但只能用导航而不能提供字段数据给予报表。 属性 描述 CloseDataSource 在报表构建后关闭相关数据源。 DataSet 一个像Ttable 或Tquery的数据集。 OpenDataSource 在构建报表前打开数据源。 Range...
: relationalStore.RdbStore; context: Context = getContext(this); dataSet?: relationalStore.ResultSet; dbSet: Array<ItemBean> = []; MyGetRdbStore() { // SQLite建立 interface StoreConfig { name: string; securityLevel: relationalStore.SecurityLevel; } const STORE_CONFIG: relationalStore.StoreConf...
RDB (Redis Database): RDB persistence performs point-in-time snapshots of your dataset at specified intervals 翻译过来就是:RDB持久性以指定的间隔执行数据集的时间点快照 所谓的快照,就是记录某一个瞬间东西,比如当我们给风景拍照时,那一个瞬间的画面...
# the dataset will likely be bigger if you have compressible values or keys.rdbcompression yes#持久化生成RDB文件进行压缩,默认 yes# Since version 5 of RDB a CRC64 checksum is placed at the end of the file. # This makes the format more resistant to corruption but there is a performance ...
# the dataset will likely be bigger if you have compressible values or keys. rdbcompression yes # Since version 5 of RDB a CRC64 checksum is placed at the end of the file. # This makes the format more resistant to corruption but there is a performance ...
RDB (Redis Database): RDB persistence performs point-in-time snapshots of your dataset at specified intervals. 上面的英文理解不理解其实不重要,理解的话就是把【内存】中的数据存储到【磁盘】上的一种策略,而当redis服务再次启动的话就会直接从【磁盘】上加载*.rdb文件,这就是RDB。 默认情况下是RDB开启的...
# the dataset will likely be bigger if you have compressible values or keys. rdbcompression yes rdbchecksum:保存和加载rdb文件时是否使用CRC64校验,默认开启。启用此参数可以使rdb文件更加安全,提高稳定性,但是会有一定的性能(大约10%)损失。如果rdb文件创建时未使用校验和,那么校验和将被设置为0,以此告知Redis...
# By default compression is enabled as it's almost always a win.# If you want to save some CPU in the saving child set it to 'no' but# the dataset will likely be bigger if you have compressible values or keys.rdbcompressionyes# Since version 5 of RDB a CRC64 checksum is placed at...
The AOF persistence logs every write operation received by the server, that will be played again at server startup, reconstructing the original dataset. Commands are logged using the same format as the Redis protocol itself, in an append-only fashion. Redis is able to rewrite the log in the...