Enum ExplainKeyword 

pub enum ExplainKeyword {
    Explain,
    Describe,
    Desc,
}

Which leading keyword spelled an EXPLAIN-family statement: the canonical EXPLAIN, or MySQL’s DESCRIBE/DESC synonyms.

A surface tag (no meta): the keyword’s span is subsumed by the enclosing ExplainStatement/DescribeStatement, exactly as ExplainFormat rides its parent’s span. MySQL accepts all three spellings for both the query-plan form (ExplainStatement) and the table-metadata form (DescribeStatement); PostgreSQL has only EXPLAIN, so its parser produces only Explain.

Variants

Explain

The canonical EXPLAIN keyword (the only spelling PostgreSQL accepts).

Describe

MySQL’s DESCRIBE synonym.

Desc

MySQL’s abbreviated DESC synonym.

Trait Implementations

impl Clone for ExplainKeyword

fn clone(&self) -> ExplainKeyword

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ExplainKeyword

impl Debug for ExplainKeyword

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ExplainKeyword

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for ExplainKeyword

impl Hash for ExplainKeyword

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 PartialEq for ExplainKeyword

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

Equality operator ==.

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

Inequality operator !=.

impl Render for ExplainKeyword

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

Return the render for this value.

fn operand_binding_power(&self) -> Option<BindingPower>

The binding power this node contributes when it appears as an operand, or None (the default) for a self-delimiting node — an atom, call, or constructor — that never needs parentheses.

impl Serialize for ExplainKeyword

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 ExplainKeyword