Struct TypeLimits 

pub struct TypeLimits {
    pub timestamp_digits: Option<Limit>,
    pub time_digits: Option<Limit>,
    pub longest_char: Option<Limit>,
    pub char_counted_in: VarcharUnit,
    pub longest_binary: Option<Limit>,
    pub longest_varbinary: Option<Limit>,
}

What one engine’s columns hold, past its decimals and its varchars — the answer to DialectCapabilities::type_limits.

None in a field means nothing stated: the engine stores the type as text that holds any value, or the number has not been recorded. Either way nothing is refused for it. Start from TypeLimits::NONE and fill in what your engine has.

Fields

timestamp_digits: Option<Limit>

The most digits of a second this dialect’s spelling of a timestamp, timestamptz or datetime keeps.

time_digits: Option<Limit>

The most digits of a second this dialect’s spelling of a time keeps.

longest_char: Option<Limit>

The longest char(n), counted in Self::char_counted_in.

char_counted_in: VarcharUnit

How Self::longest_char is counted.

longest_binary: Option<Limit>

The longest binary(n), in bytes.

longest_varbinary: Option<Limit>

The longest varbinary(n), in bytes.

Implementations

impl TypeLimits

pub const NONE: Self

Nothing stated: every field None, a char counted in characters.

pub fn misfit(&self, data_type: &DataType) -> Option<Misfit>

Why the engine cannot hold data_type, or None when it can.

Only the type itself is asked, not a type nested inside it: a caller walks an array’s or a record’s members itself.

Trait Implementations

impl Clone for TypeLimits

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TypeLimits

impl Debug for TypeLimits

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

Formats the value using the given formatter.

impl Eq for TypeLimits

impl PartialEq for TypeLimits

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for TypeLimits