Method describe

src/adapter/src/coord/sql.rs:105–116

(
        catalog: &Catalog,
        session: &Session,
        stmt: Option<Statement<Raw>>,
        param_types: Vec<Option<SqlScalarType>>,
    )

    #[mz_ore::instrument(level = "debug")]
    pub(crate) fn describe(
        catalog: &Catalog,
        session: &Session,
        stmt: Option<Statement<Raw>>,
        param_types: Vec<Option<SqlScalarType>>,
    ) -> Result<StatementDesc, AdapterError> {
        if let Some(stmt) = stmt {
            describe(catalog, stmt, &param_types, session)
        } else {
            Ok(StatementDesc::new(None))
        }
    }

    /// Verify a prepared statement is still valid. This will return an error if
    /// the catalog's revision has changed and the statement now produces a