Enum SqlToken 

pub enum SqlToken {
    Keyword(String),
    Identifier(String),
    StringLiteral(String),
    NumberLiteral(String),
    Operator(String),
    Punctuation(char),
    Comment(String),
}

SQL 令牌类型（简化 AST 分析用）。

Variants

Keyword(String)

关键字（SELECT/FROM/WHERE 等）

Identifier(String)

标识符（表名/列名）

StringLiteral(String)

字符串字面量

NumberLiteral(String)

数字字面量

Operator(String)

运算符

Punctuation(char)

标点（括号/逗号/分号）

Comment(String)

注释

Trait Implementations

impl Clone for SqlToken

fn clone(&self) -> SqlToken

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SqlToken

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

Formats the value using the given formatter.

impl PartialEq for SqlToken

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for SqlToken