Enum DescribeColumn 

pub enum DescribeColumn {
    Name {
        name: Ident,
        meta: Meta,
    },
    Wild {
        pattern: Literal,
        meta: Meta,
    },
}

The optional trailing argument of a DescribeStatement: a single column name or a LIKE-style wildcard pattern.

MySQL’s opt_describe_column is ident | text_string: a bare identifier names one column (DESCRIBE t col), a string is a pattern the column list is filtered against (DESCRIBE t 'a%'). A dotted name, a *, and a second argument are all MySQL syntax errors, so only these two shapes are modelled.

Variants

Name

A specific column name to describe.

Fields

name: Ident

Name referenced by this syntax.

meta: Meta

Source location and node identity.

Wild

A LIKE wildcard pattern selecting columns to describe.

Fields

pattern: Literal

Pattern matched by this syntax.

meta: Meta

Source location and node identity.

Trait Implementations

impl Clone for DescribeColumn

fn clone(&self) -> DescribeColumn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DescribeColumn

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DescribeColumn

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for DescribeColumn

impl Hash for DescribeColumn

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 DescribeColumn

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

Equality operator ==.

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

Inequality operator !=.

impl Render for DescribeColumn

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 DescribeColumn

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Spanned for DescribeColumn

fn span(&self) -> Span

Return the span for this value.

impl StructuralPartialEq for DescribeColumn