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CSC

描述

返回 x 的余割值,x 为弧度值,仅支持输入输出为double。输入null值时会返回null。

语法

CSC(<x>)

参数

参数说明
<x>需要被计算余割值的值

返回值

返回一个 Double 类型的值表示 x 的余割值。

特殊情况

  • xNaN,返回 NaN
  • x 为正无穷或负无穷(±Infinity),返回 NaN
  • xNULL,返回 NULL

举例

select csc(1),csc(2),csc(1000);
+--------------------+--------------------+------------------+
| csc(1) | csc(2) | csc(1000) |
+--------------------+--------------------+------------------+
| 1.1883951057781212 | 1.0997501702946164 | 1.20936599707935 |
+--------------------+--------------------+------------------+

输入null值。

select csc(null);
+--------------------+
| csc(null) |
+--------------------+
| NULL |
+--------------------+
select csc(cast('nan' as double));
+---------------------------+
| csc(cast('nan' AS DOUBLE))|
+---------------------------+
| NaN |
+---------------------------+
select csc(cast('inf' as double));
+---------------------------+
| csc(cast('inf' AS DOUBLE))|
+---------------------------+
| NaN |
+---------------------------+
select csc(cast('-inf' as double));
+----------------------------+
| csc(cast('-inf' AS DOUBLE))|
+----------------------------+
| NaN |
+----------------------------+