Struct RuleTree 

pub struct RuleTree {
    pub base: Query,
    pub qual: Option<Expr>,
    pub actions: Vec<Query>,
}

The query trees of a rule, as transformRuleStmt makes them. Each query has the relation of the rule as its first two relations, old and new.

Fields

base: Query

The range table of the condition: only old and new. DO INSTEAD NOTHING has this query as its action.

qual: Option<Expr>

The condition of WHERE, or None.

actions: Vec<Query>

The actions in order. NOTHING has no actions.

Trait Implementations

impl Clone for RuleTree

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 RuleTree

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

Formats the value using the given formatter.

impl Default for RuleTree

fn default() -> Self

Returns the “default value” for a type.