Struct StrBeforeFunction 

pub struct StrBeforeFunction;

STRBEFORE(str, separator) - Returns the substring before the first occurrence of separator

Returns the part of the string before the first occurrence of the separator. If separator is not found, returns empty string “”. If separator is empty string, returns empty string “”.

Examples

STRBEFORE("abc@example.org", "@") → "abc"
STRBEFORE("foobar", "bar") → "foo"
STRBEFORE("foobar", "xyz") → ""

Trait Implementations

impl Clone for StrBeforeFunction

fn clone(&self) -> StrBeforeFunction

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl CustomFunction for StrBeforeFunction

fn name(&self) -> &str

Function name (IRI)

fn arity(&self) -> Option<usize>

Function arity (number of parameters), None for variadic

fn parameter_types(&self) -> Vec<ValueType>

Function parameter types

fn return_type(&self) -> ValueType

Function return type

fn documentation(&self) -> &str

Function documentation

fn clone_function(&self) -> Box<dyn CustomFunction>

Clone this function (for registry operations)

fn execute(&self, args: &[Value], _context: &ExecutionContext) -> Result<Value>

Execute the function

fn validate(&self, args: &[Expression]) -> Result<()>

Validate function call at compile time

fn cost_estimate(&self, args: &[Expression]) -> f64

Estimate execution cost

fn is_deterministic(&self) -> bool

Check if function is deterministic

fn can_pushdown(&self) -> bool

Check if function can be pushed down

impl Debug for StrBeforeFunction

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.