Struct FunctionOptions 

pub struct FunctionOptions { /* private fields */ }

Implementations

impl FunctionOptions

pub const fn default() -> Self

pub const fn set_n_args(self, n_args: i32) -> Self

Set the number of parameters accepted by this function. Multiple functions may be provided under the same name with different n_args values; the implementation will be chosen by SQLite based on the number of parameters at the call site. The value may also be -1, which means that the function accepts any number of parameters. Functions which take a specific number of parameters take precedence over functions which take any number.

Panics

This function panics if n_args is outside the range -1..128. This limitation is imposed by SQLite.

pub const fn set_deterministic(self, val: bool) -> Self

Enable or disable the deterministic flag. This flag indicates that the function is pure. It must have no side effects and the value must be determined solely its the parameters.

The SQLite query planner is able to perform additional optimizations on deterministic functions, so use of this flag is recommended where possible.

pub const fn set_risk_level(self, level: RiskLevel) -> Self

Set the level of risk for this function. See the RiskLevel enum for details about what the individual options mean.

Requires SQLite 3.31.0. On earlier versions of SQLite, this function is a harmless no-op.

Trait Implementations

impl Clone for FunctionOptions

fn clone(&self) -> FunctionOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FunctionOptions

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

Formats the value using the given formatter.

impl Default for FunctionOptions

fn default() -> Self

Returns the “default value” for a type.