mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-27 18:12:02 +00:00
48 lines
1.4 KiB
C++
48 lines
1.4 KiB
C++
#include <Functions/FunctionMathUnary.h>
|
|
#include <Functions/FunctionFactory.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
namespace
|
|
{
|
|
|
|
struct AsinName { static constexpr auto name = "asin"; };
|
|
using FunctionAsin = FunctionMathUnary<UnaryFunctionVectorized<AsinName, asin>>;
|
|
|
|
}
|
|
|
|
REGISTER_FUNCTION(Asin)
|
|
{
|
|
factory.registerFunction<FunctionAsin>(FunctionDocumentation
|
|
{
|
|
.description=R"(
|
|
Calculates the arcsine of the argument.
|
|
|
|
Takes arbitrary numeric type, which includes floating point and integer numbers, as well as big integers and decimals and returns Float64.
|
|
|
|
For arguments in range [-1, 1] it returns the value in range of [-pi() / 2, pi() / 2].
|
|
|
|
It represents an inverse function to function 'sin' on this range:
|
|
[example:inverse]
|
|
|
|
It always returns Float64, even if the argument has Float32 type:
|
|
[example:float32]
|
|
|
|
For arguments outside of this range, it returns nan:
|
|
[example:nan]
|
|
|
|
Every self-respectful data scientist knows how to apply arcsine to improve ads click-through rate with ClickHouse.
|
|
For more details, see [https://en.wikipedia.org/wiki/Inverse_trigonometric_functions].
|
|
)",
|
|
.examples{
|
|
{"inverse", "SELECT asin(1.0) = pi() / 2, sin(asin(1)), asin(sin(1))", ""},
|
|
{"float32", "SELECT toTypeName(asin(1.0::Float32))", ""},
|
|
{"nan", "SELECT asin(1.1), asin(-2), asin(inf), asin(nan)", ""}},
|
|
.categories{"Mathematical", "Trigonometric"}
|
|
},
|
|
FunctionFactory::CaseInsensitive);
|
|
}
|
|
|
|
}
|