INNER CODE UNIT · Rust

query_one

rusqlite/rusqlite · src/lib.rs:716

    pub fn query_one<T, P, F>(&self, sql: &str, params: P, f: F) -> Result<T>
    where
        P: Params,
        F: FnOnce(&Row<'_>) -> Result<T>,
    {
        let mut stmt = self.prepare(sql)?;
        stmt.query_one(params, f)
    }

    // https://sqlite.org/tclsqlite.html#onecolumn
    pub(crate) fn one_column<T, P>(&self, sql: &str, params: P) -> Result<T>
    where
        T: types::FromSql,
        P: Params,
    {
        self.query_one(sql, params, |r| r.get(0))
    }

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