This section contains a summary of all functions supported in GQL.
Database Functions
Function |
Description |
|---|---|
| cardinality() | Returns the number of elements in a collection. |
| element_id() | Gets the unique identifier _uuid of a graph element. |
| labels() | Gets the label of a graph element. |
Path Functions
Function |
Description |
|---|---|
| path_length() | Returns the number of edges in a path. |
| pedges() | Collects edges in a path into a list. |
| pnodes() | Collects nodes in a path into a list. |
Aggregate Functions
Function |
Description |
|---|---|
| avg() | Computes the average of a set of numeric values. |
| collect_list() | Collects a set of values into a list. |
| count() | Returns the number of rows in the input. |
| max() | Returns the maximum value in a set of values. |
| min() | Returns the minimum value in a set of values. |
| percentile_cont() | Computes the continuous percentile value over a set of numeric values. |
| percentile_disc() | Computes the discrete percentile value over a set of numeric values. |
| stddev_pop() | Computes the population standard deviation of a set of numeric values. |
| stddev_samp() | Computes the sample standard deviation of a set of numeric values. |
| sum() | Computes the sum of a set of numeric values. |
Mathematical Functions
Function |
Description |
|---|---|
| abs() | Returns the absolute value of a given number. |
| ceil() | Rounds a given number up to the nearest integer. |
| exp() | Computes the value of Euler's number 𝑒 raised to the power of a given number. |
| floor() | Rounds a given number down to the nearest integer. |
| ln() | Computes the natural logarithm of a given number. |
| log() | Computes the logarithm of a specified number with respect to a given base. |
| log10() | Computes the base 10 logarithm of a given number. |
| mod() | Computes the modulus, or the remainder when one number is divided by another. |
| pi() | Returns the mathematical constant π (pi). |
| power() | Raises a number to the power of another number. |
| round() | Returns the nearest value of a given number, rounded to a specified position of digits. |
| sqrt() | Computes the square root of a given number. |
Trigonometric Functions
Function |
Description |
|---|---|
| acos() | Computes the angle in radians whose cosine is a given number. |
| asin() | Computes the angle in radians whose sine is a given number. |
| atan() | Computes the angle in radians whose tangent is a given number. |
| cos() | Computes the cosine of an angle expressed in radian. |
| cosh() | Computes the hyperbolic cosine of an angle expressed in radian. |
| cot() | Computes the cotangent of an angle expressed in radian. |
| degrees() | Converts an angle from radians to degrees. |
| radians() | Converts an angle from degrees to radians. |
| sin() | Computes the sine of an angle expressed in radian. |
| sinh() | Computes the hyperbolic sine of an angle expressed in radian. |
| tan() | Computes the tangent of an angle expressed in radian. |
| tanh() | Computes the angle in radians whose cosine is a given number. |
String Functions
Function |
Description |
|---|---|
| btrim() | Removes characters from both ends of a given string until encountering a character that is not contained in the specified set of characters. |
| char_length() | Returns the number of characters in a string. |
| left() | Returns a substring of the given string containing the specified number of leftmost characters. |
| lower() | Converts all the characters in a given string to lowercase. |
| ltrim() | Removes characters from the begining of a given string until encountering a character that is not contained in the specified set of characters. |
| normalize() | Converts a string into a consistent format based on the normalization form specified. |
| right() | Returns a substring of the given string containing the specified number of rightmost characters. |
| rtrim() | Removes characters from the end of a given string until encountering a character that is not contained in the specified set of characters. |
| trim() | Removes all the occurrences of the specified single character from either the leftmost, rightmost, or both ends of a given string. |
| upper() | Converts all the characters in a given string to uppercase. |
List Functions
Function |
Description |
|---|---|
| append() | Adds an element to the end of a list and returns the new list. |
| difference() | Returns the difference between two lists. |
| elements() | Returns a list containing the nodes and edges that make up a path. |
| head() | Returns the first element in a list. |
| intersection() | Returns the intersection of two lists. |
| listContains() | Checks whether a specified element exists in a list. |
| listUnion() | Returns the union of two lists. |
| reduce() | Performs a calculation iteratively using each element in a list. |
| size() | Returns the number of elements in a list. |
| trim() | Removes a specified number of elements from the right end of the list. |
Cast Functions
Function |
Description |
|---|---|
| cast() | Specifies a data conversion. |