Struct EvalEnv 

pub struct EvalEnv {
    pub params: Option<Arc<HashMap<String, Value>>>,
    pub session_variables: Option<Arc<HashMap<String, Value>>>,
    pub subquery_executor: Option<Arc<SubqueryExecutor>>,
    pub sequence_manager: Option<Arc<SequenceManager>>,
}

Bundle of per-evaluation-environment state threaded into batch expression evaluation. Replaces the old standalone params argument so future operator kinds only need to add their facility to the env.

Fields

params: Option<Arc<HashMap<String, Value>>>

Query parameter values (@name references).

session_variables: Option<Arc<HashMap<String, Value>>>

Session variable snapshot ($name references), captured once per statement at the API layer.

subquery_executor: Option<Arc<SubqueryExecutor>>

Expression-level subquery executor of the hosting operator, if any.

sequence_manager: Option<Arc<SequenceManager>>

Sequence catalog manager for curr_val / next_val, shared engine-wide. Populated from the execution runtime at operator open.

Implementations

impl EvalEnv

pub fn from_params(params: Option<Arc<HashMap<String, Value>>>) -> Self

Build an env carrying only parameter values.

Trait Implementations

impl Clone for EvalEnv

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 EvalEnv

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

Formats the value using the given formatter.

impl Default for EvalEnv

fn default() -> Self

Returns the “default value” for a type.