Struct MySQLRow 

pub struct MySQLRow<'row, R: ?Sized> { /* private fields */ }

A borrowed row that FromDrizzleRow types decode from.

Examples

use drizzle_core::FromDrizzleRow;
use drizzle_mysql::MySQLRow;
use drizzle_mysql::values::OwnedMySQLValue;

let cells = vec![
    OwnedMySQLValue::Int(7),
    OwnedMySQLValue::Bytes(b"Alice".to_vec()),
    OwnedMySQLValue::Null,
];
let row = MySQLRow::new(&cells);

assert_eq!(i64::from_row_at(&row, 0)?, 7);
assert_eq!(String::from_row_at(&row, 1)?, "Alice");
assert_eq!(Option::<String>::from_row_at(&row, 2)?, None);
assert!(row.is_null_at(3).is_err());

Implementations

impl<'row, R: MySQLRowAccess + ?Sized> MySQLRow<'row, R>

pub const fn new(inner: &'row R) -> Self

Wraps a driver row without copying it.

pub fn is_null_at(&self, offset: usize) -> Result<bool, DrizzleError>

Returns whether the cell at offset is SQL NULL.

Errors

Returns an error when the row has no cell at offset or the driver cannot read the row.

Trait Implementations

impl<'row, R: Clone + ?Sized> Clone for MySQLRow<'row, R>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'row, R: Copy + ?Sized> Copy for MySQLRow<'row, R>

impl<'row, R: Debug + ?Sized> Debug for MySQLRow<'row, R>

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

Formats the value using the given formatter.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for i8

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for i16

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for i32

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for i64

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for isize

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for u8

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for u16

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for u32

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for u64

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for usize

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for f32

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for f64

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for bool

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for char

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for String

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized> FromDrizzleRow<MySQLRow<'row, R>> for Vec<u8>

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized, const N: usize> FromDrizzleRow<MySQLRow<'row, R>> for [u8; N]

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R: MySQLRowAccess + ?Sized, const N: usize> FromDrizzleRow<MySQLRow<'row, R>> for [char; N]

const COLUMN_COUNT: usize = 1

Number of columns this type reads from the row.

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

Reads this type from row, starting at column offset.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.

impl<'row, R, T> FromDrizzleRow<MySQLRow<'row, R>> for Option<T>

where R: MySQLRowAccess + ?Sized, T: FromDrizzleRow<MySQLRow<'row, R>>,

fn from_row_at( row: &MySQLRow<'row, R>, offset: usize, ) -> Result<Self, DrizzleError>

A multi-column T (a select model in a LEFT JOIN) is absent only when every one of its columns is NULL.

const COLUMN_COUNT: usize = T::COLUMN_COUNT

Number of columns this type reads from the row.

fn from_row(row: &Row) -> Result<Self, DrizzleError>

Reads this type from row, starting at column 0.