Struct ChangesFunc 

pub struct ChangesFunc;

Trait Implementations

impl ScalarFunction for ChangesFunc

fn invoke(&self, _args: &[SqliteValue]) -> Result<SqliteValue>

Execute this function on the given arguments.

fn is_deterministic(&self) -> bool

Whether this function is deterministic (same inputs → same output).

fn num_args(&self) -> i32

The number of arguments this function accepts.

fn name(&self) -> &str

The function name, used in error messages and EXPLAIN output.

fn invoke_with_arg_subtypes( &self, args: &[SqliteValue], _arg_subtypes: &[u32], ) -> Result<SqliteValue>

Execute this function with knowledge of each argument’s value subtype (e.g. JSON_SUBTYPE for values returned by JSON functions).

fn result_subtype(&self) -> Option<u32>

The subtype this function tags onto its result value, if any.

fn min_args(&self) -> i32

Minimum accepted argument count for variadic functions.

fn max_args(&self) -> Option<i32>

Maximum accepted argument count, or None for unbounded variadic functions.

fn accepts_arg_count(&self, num_args: i32) -> bool

Return whether this function accepts num_args arguments.