Built-in math functions¶
Nebula Graph supports the following built-in math functions:
| Function | Description |
|---|---|
| double abs(double x) | Returns absolute value of the argument. |
| double floor(double x) | Returns the largest integer value smaller than or equal to the argument. (Rounds down) |
| double ceil(double x) | Returns the smallest integer greater than or equal to the argument. (Rounds up) |
| double round(double x) | Returns the integer value nearest to the argument. Returns a number farther away from 0 if the argument is in the middle. |
| double sqrt(double x) | Returns the square root of the argument. |
| double cbrt(double x) | Returns the cubic root of the argument. |
| double hypot(double x, double y) | Returns the hypotenuse of a right-angled triangle. |
| double pow(double x, double y) | Returns the result of x raised by the yth power. |
| double exp(double x) | Returns the value of e raised to the x power. |
| double exp2(double x) | Returns 2 raised to the argument. |
| double log(double x) | Returns natural logarithm of the argument. |
| double log2(double x) | Returns the base-2 logarithm of the argument. |
| double log10(double x) | Returns the base-10 logarithm of the argument. |
| double sin(double x) | Returns sine of the argument. |
| double asin(double x) | Returns inverse sine of the argument. |
| double cos(double x) | Returns cosine of the argument. |
| double acos(double x) | Returns inverse cosine of the argument. |
| double tan(double x) | Returns tangent of the argument. |
| double atan(double x) | Returns inverse tangent the argument. |
| double rand() | Returns a random floating point number in the range from 0 (inclusive) to 1 (exclusive); i.e.[0,1). |
| int rand32(int min, int max) | Returns a random 32-bit integer in [min, max). If you set only one argument, it is parsed as max and min is default to 0. If you set no argument, the system returns a random signed 32-bit integer. |
| int rand64(int min, int max) | Returns a random 64-bit integer in [min, max). If you set only one argument, it is parsed as max and min is default to 0. If you set no argument, the system returns a random signed 64-bit integer. |
| collect() | Puts all the collected values to a list. |
| avg() | Returns the average value of the argument. |
| count() | Returns the number of records. |
| max() | Returns the maximum value. |
| min() | Returns the minimum value. |
| std() | Returns the population standard deviation. |
| sum() | Returns the sum value. |
| bit_and() | Bitwise AND. |
| bit_or() | Bitwise OR. |
| bit_xor() | Bitwise exclusive OR (XOR). |
| int size() | Returns the number of elements in a list or a map. |
| int range(int start, int end, int step) | Returns a list of integers from start (inclusive) to end (inclusive) in the specified steps. step is optional and default to 1. |
| int sign(double x) | Returns the signum of the given number: 0 if the number is 0, -1 for any negative number, and 1 for any positive number. |
| double e() | Returns the base of the natural logarithm, e (2.718281828459045). |
| double pi() | Returns the mathematical constant pi (3.141592653589793). |
| double radians() | Converts degrees to radians. radians(180) returns 3.141592653589793. |
Note
If the argument is set to NULL, the output is undefined.
Last update: April 22, 2021