/*
 * VegaFusion
 * Copyright (C) 2022 Jon Mease
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with this program.
 * If not, see http://www.gnu.org/licenses/.
 */
use datafusion::logical_plan::{DFSchema, Expr};
use vegafusion_core::data::table::VegaFusionTable;
use vegafusion_core::error::Result;
use vegafusion_core::proto::gen::expression::Expression;

pub fn data_fn(table: &VegaFusionTable, _args: &[Expression], _schema: &DFSchema) -> Result<Expr> {
    Ok(Expr::Literal(table.to_scalar_value()?))
}
