Su, Xiaomeng 76a5b1ee83 dli_sqlreference_20240227

Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>

2024-03-27 22:02:33 +00:00

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acos

This function is used to return the arc cosine value of a given angle a.

Syntax

acos(DOUBLE a)

Parameters

**Table 1** Parameter
Parameter	Mandatory	Type	Description
a	Yes	DOUBLE, BIGINT, DECIMAL, or STRING	The value range is [-1,1]. The value can be a float, integer, or string. If the value is not of the DOUBLE type, the system will implicitly convert it to the DOUBLE type for calculation.

Return Values

The return value is of the DOUBLE type. The value ranges from 0 to π.

If the value of a is not within the range [-1,1], NaN is returned.
If the value of a is NULL, NULL is returned.

Example Code

The value 3.141592653589793 is returned.

select acos(-1);

The value 0 is returned.

select acos(1);

The value NULL is returned.

select acos(null);

The value NAN is returned.

select acos(10);

Parent topic: Mathematical Functions

5.4 KiB Raw Blame History