Skip to main content

plan_lateral_join

nodedb_sql::planner::lateral::plan

Function plan_lateral_join 

Source 
pub fn plan_lateral_join(
    outer_plan: SqlPlan,
    outer_alias: Option<String>,
    subquery: &Query,
    lateral_alias: &str,
    left_join: bool,
    outer_projection: Vec<Projection>,
    catalog: &dyn SqlCatalog,
    functions: &FunctionRegistry,
    temporal: TemporalScope,
) -> Result<SqlPlan>
Expand description

Plan a LATERAL subquery join.

Called when the right side of a JOIN (or a comma-separated FROM item) is a TableFactor::Derived { lateral: true, .. }.

outer_plan — plan for the driving (outer) side. outer_alias — alias or name of the outer table for correlation detection. subquery — the LATERAL inner subquery. lateral_alias — alias given to the LATERAL in the SQL (e.g. x in LATERAL (...) x). left_join — true when the enclosing join is LEFT JOIN LATERAL (outer rows preserved when inner produces no rows). outer_projection — SELECT list projection to apply after the lateral.