Get for text results when querying

[EPashkin]

Fix #389

[sfackler]

This shouldn't use the Row type since FromSql will not work with almost any of the types returned in text mode.

[EPashkin]

You right, in your project it used with proxy function, but in general case it need more thoughts.

decode_column_value_common::<postgres_types::AcceptEverythingString>(row, i)


fn decode_column_value_common<'a, T: postgres::types::FromSql<'a> + std::fmt::Display>(
    row: &'a Row,
    i: usize,
) -> String {
    match row.try_get::<usize, T>(i) {
        Ok(data) => format!("{}", data),
        Err(_) => "<null>".to_string(),
    }
}

[EPashkin]

@sfackler Sorry, as you stated, no good solution for this issue.
I close MR.