is the file used for the XML-based configuration. By using this file, you can configure various elements. The following programing is a typical structure of MyBatis configuration file. of the configuration XML file"/> Let us discuss the important elements tags of the configuration XML file one by one. environments tag Within the environments element application. In MyBatis, you can connect to multiple databases by configuring multiple environment elements. To configure the environment, we are provided with two sub tags namely transactionManager and dataSource

maxElementsInMemory - 在内存中缓存的element的最大数目 l maxElementsOnDisk - 在磁盘上缓存的element的最大数目，若是0表示无穷大 l eternal - 设定缓存的elements是否永远不过期。如果为true，则缓存的数据始 终有效，如果为false那么还要根据timeToIdleSeconds，timeToLiveSeconds判断 l overflowToDisk

maxElementsInMemory - 在内存中缓存的 element 的最大数目 maxElementsOnDisk - 在磁盘上缓存的 element 的最大数目，若是 0 表示无穷大 eternal - 设定缓存的 elements 是否永远不过期。如果为 true，则缓存的数据始终有效， 如果为 false 那么还要根据 timeToIdleSeconds，timeToLiveSeconds 判断 overflowToDisk

practical examples. Syntax Rule In DistSQL statement, except for keywords, the input format of other elements shall conform to the following rules. 4.2. ShardingSphere-Proxy 197 Apache ShardingSphere document table. After traversing current data result sets in the linked table, it only needs to move the elements of the linked table back one bit and continue traversing the next data result set. Order-by Merger

practical examples. Syntax Rule In DistSQL statement, except for keywords, the input format of other elements shall conform to the following rules. 4.2. ShardingSphere-Proxy 203 Apache ShardingSphere document table. After traversing current data result sets in the linked table, it only needs to move the elements of the linked table back one bit and continue traversing the next data result set. Order-by Merger

ShardingSphere document Syntax Rule In DistSQL statement, except for keywords, the input format of other elements shall conform to the following rules. Identifier 1. The identifier represents an object in the table. After traversing current data result sets in the linked table, it only needs to move the elements of the linked table back one bit and continue traversing the next data result set. Order-by Merger

practical examples. Syntax Rule In DistSQL statement, except for keywords, the input format of other elements shall conform to the following rules. Identifier 1. The identifier represents an object in the table. After traversing current data result sets in the linked table, it only needs to move the elements of the linked table back one bit and continue traversing the next data result set. Order-by Merger