Struct DeclaredColumn 

pub struct DeclaredColumn {
    pub name: String,
    pub column_type: ColumnType,
    pub int_width: Option<IntWidth>,
    pub float_width: Option<FloatWidth>,
}

One declared column whose stored value the write path re-types.

Fields

name: String

The field name, as the catalog records it.

column_type: ColumnType

Int64, Float64, or Decimal(Some(typmod)).

int_width: Option<IntWidth>

The declared integer width. SMALLINT and INTEGER bound the value.

float_width: Option<FloatWidth>

The declared float width. REAL refuses a finite value past f32.

Implementations

impl DeclaredColumn

pub fn from_declared(name: &str, declared: &str) -> Option<Self>

The column name declared as declared, the DDL type text with its modifiers.

Some only for a type that fixes the stored numeric value: an integer, a float, or a DECIMAL(p,s). Every other declared type is stored as given and returns None.

pub fn from_column_def(column: &ColumnDef) -> Option<Self>

The typed schema column column, with its declared width.

Some only for a column type that fixes the stored numeric value, as Self::from_declared decides.

Trait Implementations

impl Clone for DeclaredColumn

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DeclaredColumn

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DeclaredColumn

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for DeclaredColumn

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl PartialEq for DeclaredColumn

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for DeclaredColumn

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for DeclaredColumn

impl ToMessagePack for DeclaredColumn

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

fn size_hint(&self) -> Option<TrustedSizeHint>

Returns a trusted upper bound for the number of bytes written by the next call to Self::write, or None when it cannot be determined cheaply.

fn max_size() -> Option<TrustedSizeHint>

Returns a trusted upper bound valid for every value of this type.

fn write_slice<W>(values: &[Self], writer: &mut W) -> Result<(), Error>

where W: Write, Self: Sized,

Writes the MessagePack representation of a slice of values into the provided writer.