Struct QueryContext 

pub struct QueryContext {
    pub sql: CompactString,
    pub params: Box<[CompactString]>,
    pub param_count: usize,
}

The SQL and parameters of a failed query.

Attach it with ResultExt::with_query. The error message and the Debug output show the SQL and how many parameters were bound, never their values: they often hold personal data or secrets, and errors end up in logs (.unwrap() prints Debug). The values stay available in params.

Fields

sql: CompactString

Rendered SQL statement.

params: Box<[CompactString]>

Debug-rendered parameter values, truncated to keep errors bounded.

param_count: usize

Total number of parameters, including any omitted from params.

Implementations

impl QueryContext

pub fn new<V: Debug>(sql: &str, params: &[&V]) -> Self

Captures sql and the Debug form of each parameter.

At most 32 parameters are kept, each cut to 128 characters, so the error stays small.

Trait Implementations

impl Clone for QueryContext

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryContext

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

Formats the value using the given formatter.