Enum QueryType 

#[non_exhaustive]
pub enum QueryType {
    Unknown,
    Select,
    Insert,
    Update,
    Delete,
    Merge,
}

Which statement a query renders.

Carried so the execution layer can decide whether to expect rows without parsing the SQL back.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Unknown

Not one of the four — a raw statement, a DDL statement, a bare expression.

Select

SELECT.

Insert

INSERT.

Update

UPDATE.

Delete

DELETE.

Merge

MERGE — PostgreSQL’s conditional insert/update/delete against a source.

A fifth statement kind rather than a flavour of the four: whether it returns rows depends on its RETURNING clause, exactly as for the three mutations, but it is none of them.

Trait Implementations

impl Clone for QueryType

fn clone(&self) -> QueryType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for QueryType

impl Debug for QueryType

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

Formats the value using the given formatter.

impl Default for QueryType

fn default() -> QueryType

Returns the “default value” for a type.

impl Display for QueryType

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

Formats the value using the given formatter.

impl Eq for QueryType

impl Hash for QueryType

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

where __H: Hasher,

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 PartialEq for QueryType

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for QueryType