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表值函数UnwindArray

功能概述

UnwindArray 是系统中的另一个表值函数，用于将数组元素展开为数据行。

语法

UnwindArray ( arrayObject )

arrayObject 可以是命令参数表达式、公共函数 SPLIT 和 ARRAY 返回的数组。

公用函数 SPLIT 可以使用指定的定界符将字符串分割为多个段：
SPLIT（'hello，world'，'，'）返回字符串数组：[“ hello”，“ world”]
通用函数ARRAY可以根据函数参数构建对象数组：
ARRAY（1,2，'hello'）返回对象数组：[1，2，“ hello”]

数据架构

列索引	列名	数据类型	说明
0	Value	object	数组元素的值

UnwindArray 示例

示例一

select CINT(Value) as INT from UnwindArray(ARRAY(1,2,3)) tmp

结果表：

INT
1
2
3

示例二

select CSTR(Value) as STR from UnwindArray(SPLIT('hello+world','+')) tmp

结果表：

STR
hello
world