#[derive(Debug, Clone, PartialEq)]
pub enum ASTNode {
SQLIdentifier(String),
SQLBinaryExpr {
left: Box<ASTNode>,
op: SQLOperator,
right: Box<ASTNode>,
},
SQLNested(Box<ASTNode>),
SQLUnary {
operator: SQLOperator,
rex: Box<ASTNode>,
},
SQLLiteralLong(i64),
SQLLiteralDouble(f64),
SQLFunction {
id: String,
args: Vec<ASTNode>,
},
SQLOrderBy {
expr: Box<ASTNode>,
asc: bool,
},
SQLSelect {
projection: Vec<ASTNode>,
relation: Option<Box<ASTNode>>,
selection: Option<Box<ASTNode>>,
order_by: Option<Vec<ASTNode>>,
group_by: Option<Vec<ASTNode>>,
having: Option<Box<ASTNode>>,
limit: Option<Box<ASTNode>>,
},
SQLCreateTable {
name: String,
columns: Vec<SQLColumnDef>,
},
}
#[derive(Debug, Clone, PartialEq)]
pub struct SQLColumnDef {
pub name: String,
pub data_type: SQLType,
pub allow_null: bool,
}
#[derive(Debug, Clone, PartialEq)]
pub enum SQLType {
Varchar(usize),
Float,
Double,
Int,
Long,
}
#[derive(Debug, PartialEq, Clone)]
pub enum SQLOperator {
Plus,
Minus,
Multiply,
Divide,
Modulus,
Gt,
Lt,
GtEq,
LtEq,
Eq,
NotEq,
}