Struct RuleConditionNameResolver 

pub struct RuleConditionNameResolver<'a> {
    pub columns: &'a [(String, ColumnType)],
    pub event: RuleEvent,
}

Fields

columns: &'a [(String, ColumnType)]

event: RuleEvent

Trait Implementations

impl VariableResolver for RuleConditionNameResolver<'_>

fn resolve_name( &mut self, _name: &str, ) -> Result<Option<ResolvedVariable>, SQLError>

Current value of an unqualified name. Ok(None) leaves the column reference for the engine to resolve.

fn resolve_qualified( &mut self, _qualifier: &str, _column: &str, ) -> Result<Option<ResolvedVariable>, SQLError>

Current value of qualifier.column (record field access).

fn resolve_param( &mut self, _index: usize, ) -> Result<Option<ResolvedVariable>, SQLError>

Value of a positional $n reference (function arguments).

fn rewrite_name(&mut self, name: &str) -> Result<Option<Expr>, SQLError>

Optional expression-level rewrite hook. The default preserves the variable-substitution behavior used by PL/pgSQL while allowing catalog lifecycle code to rewrite a reference without fabricating a literal value.

fn rewrite_qualified( &mut self, qualifier: &str, column: &str, ) -> Result<Option<Expr>>

Expression-level counterpart of Self::resolve_qualified.

fn rewrite_qualified_star( &mut self, _qualifier: &str, ) -> Result<Option<Vec<Expr>>>

Expand qualifier.* when the containing SQL construct treats it as a list item. Scalar binding deliberately does not call this hook because PostgreSQL treats the same syntax as a composite whole-row value in scalar contexts.

fn rewrite_qualified_whole_row( &mut self, _qualifier: &str, ) -> Result<Option<Expr>>

Resolve qualifier.* when it appears in a scalar context and therefore denotes one composite whole-row value rather than a projection list.

fn rewrite_param(&mut self, index: usize) -> Result<Option<Expr>>

Expression-level counterpart of Self::resolve_param.

fn rewrite_internal( &mut self, _column: InternalColumnRef, ) -> Result<Option<Expr>>

Observe or replace an executor-only structural column reference. SQL variable resolvers normally leave these untouched.