Struct ExecutionContext 

pub struct ExecutionContext<'a> {
    pub catalog: &'a mut Catalog,
    /* private fields */
}

Shared state threaded through every physical operator during execution. Exposes MVCC helpers, storage access, expression evaluation and DDL utilities.

Fields

catalog: &'a mut Catalog

Mutable reference to the global catalog (schema + metadata).

Implementations

impl<'a> ExecutionContext<'a>

pub fn new( catalog: &'a mut Catalog, txn: &'a mut Transaction, txn_mgr: Arc<TransactionManager>, storage: Arc<HoltStorage>, ) -> Self

pub fn eval_predicate(&self, expr: &Expr, tuple: &Tuple) -> QuillSQLResult<bool>

Evaluate an expression expected to produce a boolean result.

pub fn eval_expr( &self, expr: &Expr, tuple: &Tuple, ) -> QuillSQLResult<ScalarValue>

Evaluate an arbitrary scalar expression.

pub fn table(&self, table: &TableReference) -> QuillSQLResult<TableBinding>

Look up the table binding through Holt storage.

pub fn txn_ctx(&self) -> &TxnContext<'a>

pub fn txn_ctx_mut(&mut self) -> &mut TxnContext<'a>