Struct Ast 

pub struct Ast {
    pub expressions: Vec<TopLevelExpr>,
}

Fields

expressions: Vec<TopLevelExpr>

Implementations

impl Ast

pub fn single_expr(expr: Expr) -> Self

Creates an ast with a signle expression

pub fn num_statements(&self) -> usize

pub fn is_value_expression(&self) -> bool

Returns true if this AST is exactly one top-level expression and that expression describes inert data only: a literal (including objects, arrays and sets of inert data), a $param reference, or a built-in constant.

Use this to validate request payloads that are intended to supply values rather than to execute SurrealQL (e.g. the body of a REST /key request that is bound to $data). Function calls, idioms, statements (CREATE/UPDATE/…), blocks, binary expressions and other executable forms are all rejected, including when nested inside object or array literals.

pub fn get_let_statements(&self) -> Vec<String>

pub fn add_param(&mut self, name: String)

pub fn contains_cancel(&self) -> bool

Whether a top-level CANCEL (transaction rollback) appears in this AST.

pub fn is_sole_commit(&self) -> bool

Whether this AST is exactly a single top-level COMMIT.

pub fn is_sole_cancel(&self) -> bool

Whether this AST is exactly a single top-level CANCEL.

pub fn into_execution_units(self) -> Vec<Ast>

Split this query into sequentially executable units: each non-transactional top-level statement becomes a unit of its own, while the statements of a BEGIN..COMMIT/CANCEL block stay together as one unit. A BEGIN without a matching COMMIT/CANCEL keeps the remainder of the query in its unit.

Trait Implementations

impl Clone for Ast

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Ast

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

Formats the value using the given formatter.

impl PartialEq for Ast

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Ast

impl ToSql for Ast

fn fmt_sql(&self, f: &mut String, fmt: SqlFormat)

Format the type to a SQL string.

fn to_sql(&self) -> String

Convert the type to a SQL string.

fn to_sql_pretty(&self) -> String

Convert the type to a pretty-printed SQL string with indentation.