rudy gao

--pg支持范围类型• int4range — Range of integer• int8range — Range of bigint• numrange — Range of numeric• tsrange — Range of timestamp without time zone• tstzrange — Range of timestamp with time zone•

--pg支持 EXCLUSION Constraint,排它约束是约束中定义的操作计算结果为false，则不允许插入Exclusion constraints ensure that if any two rows are compared on the specified columns or expressions using the specified operators, at leas

--pg支持数组，且支持分片访问，比如[1:2],任意只有一个数字（没有冒号）的维数是从 1 开始到声明的数字为止的 --如果任意维数被写为一个片段，也就是，包含一个冒号，那么所有维数都被当做是片段If any dimension is written as a slice, i.e., contains a colon, then all dimensions are treated as