Struct SqlReadContext 

pub struct SqlReadContext<'connection> { /* private fields */ }

Host SQL against Coven’s retained database connection.

The connection remains private. This context exposes query operations while preventing callers from changing connection configuration or starting an independent transaction.

fn cannot_write(sql: coven::SqlReadContext<'_>) {
    sql.execute("DELETE FROM notes", []);
}

Implementations

impl<'connection> SqlReadContext<'connection>

pub fn query_row<T, P, F>( &self, sql: &str, params: P, map: F, ) -> Result<T, Error>

where P: Params, F: FnOnce(&Row<'_>) -> Result<T, Error>,

pub fn query<T, P, F>( &self, sql: &str, params: P, map: F, ) -> Result<Vec<T>, Error>

where P: Params, F: FnMut(&Row<'_>) -> Result<T, Error>,