Struct EvalContext 

pub struct EvalContext<'a> {
    pub row: Option<&'a ResultRow>,
    pub params: &'a [SQLParam],
    pub engine: Option<&'a dyn EngineHook>,
    /* private fields */
}

Fields

row: Option<&'a ResultRow>

params: &'a [SQLParam]

engine: Option<&'a dyn EngineHook>

Implementations

impl<'a> EvalContext<'a>

pub fn new(row: Option<&'a ResultRow>, params: &'a [SQLParam]) -> Self

pub fn from_row_lookup(row: &'a dyn RowLookup, params: &'a [SQLParam]) -> Self

pub fn with_engine(self, engine: &'a dyn EngineHook) -> Self

pub fn column_value(&self, name: &str) -> Result<Value>

Resolve an unqualified column through the same row semantics used by the AST evaluator. Physical scalar IR evaluators call this instead of reconstructing an Expr::Column carrier.

pub fn qualified_column_value( &self, qualifier: &str, column: &str, ) -> Result<Value>

Resolve a qualified column without constructing an AST expression.