在Informix数据库服务器环境中，网格是一组用于简化管理的复制服务器。
In the Informix database server environment, a grid is a set of replication servers that simplify administration.
就像城市地图按网格分成一些区一样，数据库管理器使用分区键来确定数据所存储在的位置(数据库分区)。
Just as a city map is organized into sections using a grid, the database manager USES a partitioning key to determine the location (the database partition) where the data is stored.
ifx_grid_function：连接到系统管理数据库时运行网格例程中的SQL管理API命令。
Ifx_grid_function - Run SQL administration API commands in grid routines while connected to sysadmin database.
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