Struct mz_postgres_util::desc::PostgresColumnDesc

pub struct PostgresColumnDesc {
    pub name: String,
    pub col_num: u16,
    pub type_oid: Oid,
    pub type_mod: i32,
    pub nullable: bool,
}

Describes a column in a PostgresTableDesc.

Fields

name: String

The name of the column.

col_num: u16

The column’s monotonic position in its table, i.e. “this was the _i_th column created” irrespective of the current number of columns.

type_oid: Oid

The OID of the column’s type.

type_mod: i32

The modifier for the column’s type.

nullable: bool

True if the column lacks a NOT NULL constraint.

Implementations

impl PostgresColumnDesc

fn is_compatible( &self, other: &PostgresColumnDesc, allow_type_to_change_by_col_num: &BTreeSet<u16>, ) -> bool

Determines if data a relation with a structure of other can be treated the same as self.

Note that this function somewhat unnecessarily errors if the names differ; this is negotiable but we want users to understand the fixedness of names in our schemas.

Trait Implementations

impl Arbitrary for PostgresColumnDesc

type Parameters = (<String as Arbitrary>::Parameters, <u16 as Arbitrary>::Parameters, <u32 as Arbitrary>::Parameters, <i32 as Arbitrary>::Parameters, <bool as Arbitrary>::Parameters)

The type of parameters that arbitrary_with accepts for configuration of the generated Strategy. Parameters must implement Default.

type Strategy = Map<(<String as Arbitrary>::Strategy, <u16 as Arbitrary>::Strategy, <u32 as Arbitrary>::Strategy, <i32 as Arbitrary>::Strategy, <bool as Arbitrary>::Strategy), fn(_: (String, u16, u32, i32, bool)) -> PostgresColumnDesc>

The type of Strategy used to generate values of type Self.

fn arbitrary_with(_top: Self::Parameters) -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self). The strategy is passed the arguments given in args.

fn arbitrary() -> Self::Strategy

Generates a Strategy for producing arbitrary values of type the implementing type (Self).

impl Clone for PostgresColumnDesc

fn clone(&self) -> PostgresColumnDesc

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for PostgresColumnDesc

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for PostgresColumnDesc

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for PostgresColumnDesc

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RustType<ProtoPostgresColumnDesc> for PostgresColumnDesc

fn into_proto(&self) -> ProtoPostgresColumnDesc

Convert a Self into a Proto value.

fn from_proto(proto: ProtoPostgresColumnDesc) -> Result<Self, TryFromProtoError>

Consume and convert a Proto back into a Self value.

fn into_proto_owned(self) -> Proto

A zero clone version of Self::into_proto that types can optionally implement, otherwise, the default implementation delegates to Self::into_proto.

impl Serialize for PostgresColumnDesc

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for PostgresColumnDesc

impl StructuralPartialEq for PostgresColumnDesc