子类型关系 子类型关系 如果对象 a 继承自 b, a 是 b 的类型。 这种了类型关系扩展到 var, ref, ptr : proc isSubtype ( a , b : PType ): bool = if a . kind == b . kind : case a . kind of ...
Import the data from S3 Compatible object storage Overview Method 1: LOAD DATA Syntax Tutorial: Load a file from AWS S3 Method 2: Specify S3 file to an external table Syntax T...
子类型关系 子类型关系 如果对象 a 继承自 b , a 是 b 的类型。 这种了类型关系扩展到 var , ref , ptr : proc isSubtype ( a , b : PType ): bool = if a . kind == b . kind : case a . kind ...
Wildcard Matching Wildcard Matching Implement wildcard pattern matching with support for '?' and '*' . '?' Matches any single character . '*' Matches any sequence of ...
LOAD DATA Description Syntax Input File Location IGNORE LINES Field and Line Handling SET PARALLEL Supported file formats CSV format standard description Examples Exam...