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2年10月21天

PostgreSQL学习篇9.15 JSON类型

第一次见这种类型。JSON数据类型可以用来存储JSON(JavaScript Object Notation)数据。JSON和JSONB类型。postgres=# select '9'::json,'"osdba"'::json,'true'::json,'TRUE'::json,'null'::json;ERROR: invalid input syntax for type

Linux进程sched类的优先级顺序

/* * The order of the sched class addresses are important, as they are * used to determine the order of the priority of each sched class in * relation to each other. */#define SCHED_DATA \ STRUCT_ALIGN(); \ __begin_sched_classes = .; \ *(...