Struct ExplainStatement 

pub struct ExplainStatement<X: Extension = NoExt> {
    pub spelling: ExplainKeyword,
    pub parenthesized: bool,
    pub options: ThinVec<ExplainOption>,
    pub statement: Box<Statement<X>>,
    pub meta: Meta,
}

An EXPLAIN statement: report the planner’s query plan for an inner statement.

Covers both option spellings: the legacy EXPLAIN [ANALYZE] [VERBOSE] <statement> keyword prefix and the modern parenthesized list EXPLAIN ( option [, ...] ) <statement>. They share one options list; the parenthesized surface tag records which spelling was written so the construct round-trips, since the legacy prefix can only carry Analyze/Verbose.

MySQL spells the same query-plan statement EXPLAIN, DESCRIBE, or DESC interchangeably (DESCRIBE SELECT 1 is EXPLAIN SELECT 1), so the leading keyword rides the spelling surface tag; PostgreSQL only has EXPLAIN, so its parser always sets Explain. The separate MySQL table-metadata overload (DESCRIBE <table>) is a different shape — a table name rather than an inner statement — and rides its own DescribeStatement, not this node.

Which inner statements PostgreSQL actually allows after EXPLAIN (a query, INSERT/UPDATE/DELETE, CREATE TABLE AS, …) is a semantic restriction left to a later pass; the grammar accepts any Statement.

Fields

spelling: ExplainKeyword

Which leading keyword spelled the statement (EXPLAIN/DESCRIBE/DESC); always Explain outside MySQL.

parenthesized: bool

Whether the parenthesized form was present in the source.

options: ThinVec<ExplainOption>

Options supplied in source order.

statement: Box<Statement<X>>

Statement governed by this node.

meta: Meta

Source location and node identity.

Trait Implementations

impl<X: Clone + Extension> Clone for ExplainStatement<X>

fn clone(&self) -> ExplainStatement<X>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<X: Debug + Extension> Debug for ExplainStatement<X>

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

Formats the value using the given formatter.

impl<'de, X> Deserialize<'de> for ExplainStatement<X>

where X: Deserialize<'de> + Extension,

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<X: Eq + Extension> Eq for ExplainStatement<X>

impl<X: Hash + Extension> Hash for ExplainStatement<X>

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<X: PartialEq + Extension> PartialEq for ExplainStatement<X>

fn eq(&self, other: &ExplainStatement<X>) -> bool

Equality operator ==.

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

Inequality operator !=.

impl<X: Extension + Render> Render for ExplainStatement<X>

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<X> Serialize for ExplainStatement<X>

where X: Serialize + Extension,

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<X: Extension> Spanned for ExplainStatement<X>

fn span(&self) -> Span

Return the span for this value.

impl<X: PartialEq + Extension> StructuralPartialEq for ExplainStatement<X>