Function plan_array_subquery

src/sql/src/plan/query.rs:4661–4688

(
    ecx: &ExprContext,
    query: &Query<Aug>,
)

}

fn plan_array_subquery(
    ecx: &ExprContext,
    query: &Query<Aug>,
) -> Result<CoercibleScalarExpr, PlanError> {
    plan_vector_like_subquery(
        ecx,
        query,
        |elem_type| {
            matches!(
                elem_type,
                SqlScalarType::Char { .. }
                    | SqlScalarType::Array { .. }
                    | SqlScalarType::List { .. }
                    | SqlScalarType::Map { .. }
            )
        },
        |elem_type| ArrayCreate { elem_type }.into(),
        |order_by| AggregateFunc::ArrayConcat { order_by },
        expr_func::ArrayArrayConcat.into(),
        |elem_type| {
            HirScalarExpr::literal(
                Datum::empty_array(),
                SqlScalarType::Array(Box::new(elem_type)),
            )
        },
        "[]",
    )
}

/// Generic function used to plan both array subqueries and list subqueries
fn plan_vector_like_subquery<F1, F2, F3, F4>(