Frees the memory of the container structure.
释放容器结构所占的内存。
Allocates memory to the container structure based on the number of container data.
根据容器数据的多少为容器结构分配内存。
You can think of a schema as a container for all the related structure definitions within a particular database.
可以把模式当成特定数据库中所有相关结构定义的容器。
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