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LockTablesStatement

Struct LockTablesStatement 

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pub struct LockTablesStatement {
    pub plural: bool,
    pub tables: ThinVec<TableLock>,
    pub meta: Meta,
}
Expand description

A MySQL LOCK {TABLES | TABLE} <tbl> [[AS] <alias>] <lock-kind> [, ...] explicit table-locking statement (gated by UtilitySyntax::lock_tables).

This is one of two distinct behaviours a dialect can attach to the leading LOCK keyword, the split modelled the DoExpressionsStatement / DoStatement way (a behaviour-named gate per reading, never both armed in one preset). MySQL’s LOCK TABLES names a per-table lock kind (READ, READ LOCAL, WRITE) on each table in a list — the shape captured here. PostgreSQL’s LOCK TABLE, by contrast, takes a single statement-level lock mode clause (IN ACCESS SHARE MODE, NOWAIT, …) over a relation list; that reading is not implemented, but when it is it takes its own node behind its own LOCK-keyword gate, so the two never collide. The MySql/Lenient presets arm lock_tables; every other preset leaves the leading LOCK keyword undispatched (an unknown statement).

The grammar is LOCK table_or_tables table_lock_list (mysql sql_yacc.yy lock / table_lock_list), so the TABLES (plural) and TABLE (singular) spellings are interchangeable and preserved on plural to round-trip. Each TableLock carries a mandatory lock kind — a bare LOCK TABLES t1 with no kind is ER_PARSE_ERROR (engine-measured on mysql:8.4.10), which the parser enforces. The list is non-empty. Non-generic, like UseStatement: a table lock carries no expressions or extension nodes.

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§plural: bool

The keyword spelling: true for LOCK TABLES (plural), false for LOCK TABLE (singular). Both are grammar-equal; preserved so the exact spelling round-trips.

§tables: ThinVec<TableLock>

The locked tables in source order; always non-empty.

§meta: Meta

Source location and node identity.

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impl Clone for LockTablesStatement

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fn clone(&self) -> LockTablesStatement

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for LockTablesStatement

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

Formats the value using the given formatter. Read more
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impl<'de> Deserialize<'de> for LockTablesStatement

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fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>
where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer. Read more
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impl Eq for LockTablesStatement

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impl Hash for LockTablesStatement

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl PartialEq for LockTablesStatement

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

Equality operator ==. Read more
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fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl Render for LockTablesStatement

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

Return the render for this value.
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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. Read more
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impl Serialize for LockTablesStatement

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

Serialize this value into the given Serde serializer. Read more
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impl Spanned for LockTablesStatement

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fn span(&self) -> Span

Return the span for this value.
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impl StructuralPartialEq for LockTablesStatement

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> DeserializeOwned for T
where T: for<'de> Deserialize<'de>,

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impl<T> DynAstExt for T
where T: Extension + Render + 'static,

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fn as_any(&self) -> &(dyn Any + 'static)

Erase to &dyn Any for downcasting a node back to its concrete type.
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fn dyn_clone(&self) -> Box<dyn DynAstExt>

Clone into a fresh box — the object-safe stand-in for Clone (whose Self-returning signature cannot go through a vtable).
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fn dyn_eq(&self, other: &dyn DynAstExt) -> bool

Structural equality against another erased node — the object-safe stand-in for PartialEq (whose &Self argument cannot go through a vtable). Equal iff other holds the same concrete type and that type deems the values equal; differently-typed nodes are never equal.
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fn dyn_hash(&self, state: &mut dyn Hasher)

Feed this node’s hash into an erased hasher — the object-safe stand-in for Hash::hash (whose generic H: Hasher cannot go through a vtable).
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impl<T> Extension for T
where T: Clone + Debug + Eq + Hash + Spanned,

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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> RenderExt for T
where T: Render,

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fn displayed<'a>(&'a self, ctx: &'a RenderCtx<'a>) -> Displayed<'a, T>

Pair this node with an explicit canonical RenderCtx so format!, to_string, and {} render it. This is the canonical path: the ctx’s resolver and source must match the node’s parse.
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fn debug_sql<'a>(&'a self, resolver: &'a dyn Resolver) -> DebugSql<'a, Self>
where Self: Sized,

Render this node for debugging against an explicitly-supplied resolver (the debug-SQL mitigation), returning a Display adapter. Read more
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.