Method get_struct_unnest_columns

datafusion/sql/src/select.rs:538–565

(
        &self,
        input: &LogicalPlan,
        expr: &Expr,
    )

    }

    fn get_struct_unnest_columns(
        &self,
        input: &LogicalPlan,
        expr: &Expr,
    ) -> Result<Option<Vec<Column>>> {
        let unnest_expr = match expr {
            Expr::Unnest(unnest_expr) => Some(unnest_expr),
            Expr::Alias(alias) => match alias.expr.as_ref() {
                Expr::Unnest(unnest_expr) => Some(unnest_expr),
                _ => None,
            },
            _ => None,
        };

        let Some(unnest_expr) = unnest_expr else {
            return Ok(None);
        };

        let field = unnest_expr.expr.to_field(input.schema())?.1;
        let DataType::Struct(inner_fields) = field.data_type() else {
            return Ok(None);
        };

        Ok(Some(get_struct_unnested_columns(
            &unnest_expr.expr.schema_name().to_string(),
            inner_fields,
        )))
    }

    fn try_process_aggregate_unnest(&self, input: LogicalPlan) -> Result<LogicalPlan> {
        match input {