Struct Fetchs 

pub struct Fetchs(/* private fields */);

A list of fetches to be applied to the result of a query.

Fetches are applied to the result of a query in the order they are specified. For this reason, the list of fetches is always sorted to ensure that parent fetches are applied before child fetches.

For example: FETCH a.b, a is sorted to FETCH a, a.b. FETCH a.b, a.b.c, d, a, b is sorted to FETCH a, a.b, a.b.c, b, d.

This prevents confusing behaviour like FETCH a.b, a only returning a because a.b gets clobbered by a.

Implementations

impl Fetchs

pub fn walk_revisioned_field_names( wire_revision: u16, ) -> &'static [&'static str]

Field names at the given wire revision in declaration order. Returns an empty slice if the revision is unknown. Generated by the revisioned derive.

impl Fetchs

pub const REVISION: u16 = 1u16

The revision number of this type, as declared via #[revisioned(revision = N)].

impl Fetchs

pub fn new(fetches: Vec<Fetch>) -> Self

pub fn read_only(&self) -> bool

Whether evaluating every fetch target can be done on a read-only transaction.

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn iter(&self) -> impl Iterator<Item = &Fetch>

pub fn iter_mut(&mut self) -> impl Iterator<Item = &mut Fetch>

Trait Implementations

impl Clone for Fetchs

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 Fetchs

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

Formats the value using the given formatter.

impl DeserializeRevisioned for Fetchs

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

Deserializes a new instance of the struct from the specified reader.

impl Eq for Fetchs

impl From<Fetchs> for Fetchs

fn from(v: Fetchs) -> Self

Converts to this type from the input type.

impl From<Fetchs> for Fetchs

fn from(v: Fetchs) -> Self

Converts to this type from the input type.

impl Hash for Fetchs

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl InfoStructure for Fetchs

fn structure(self) -> Value

impl IntoIterator for Fetchs

type Item = Fetch

The type of the elements being iterated over.

type IntoIter = IntoIter<<Fetchs as IntoIterator>::Item>

Which kind of iterator are we turning this into?

fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value.

impl PartialEq for Fetchs

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

Equality operator ==.

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

Inequality operator !=.

impl Revisioned for Fetchs

fn revision() -> u16

Returns the current revision of this type.

fn type_id() -> TypeId

where Self: 'static,

Returns the type id of this type.

impl SerializeRevisioned for Fetchs

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

Serializes the struct using the specified writer.

impl SkipCheckRevisioned for Fetchs

fn skip_check_revisioned<R: Read>(reader: &mut R) -> Result<(), Error>

impl SkipRevisioned for Fetchs

fn skip_revisioned<R: Read>(reader: &mut R) -> Result<(), Error>

fn skip_revisioned_slice(reader: &mut SliceReader<'_>) -> Result<(), Error>

Consume through bytes backed by SliceReader without allocating a buffer for bulk segments.

impl StructuralPartialEq for Fetchs

impl ToSql for Fetchs

fn fmt_sql(&self, f: &mut String, fmt: SqlFormat)

Format the type to a SQL string.

fn to_sql(&self) -> String

Convert the type to a SQL string.

fn to_sql_pretty(&self) -> String

Convert the type to a pretty-printed SQL string with indentation.

impl WalkRevisioned for Fetchs

type Walker<'r, R: BorrowedReader + 'r> = FetchsWalker<'r, R>

Walker produced by walk_revisioned.

fn walk_revisioned<'r, R: BorrowedReader>( reader: &'r mut R, ) -> Result<Self::Walker<'r, R>, Error>

Read the type’s revision-level prefix and return a walker positioned at the start of the body.