src/utils.rs

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//
//   http://www.apache.org/licenses/LICENSE-2.0
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use crate::errors::DataFusionError;
use datafusion::logical_expr::Volatility;
use pyo3::prelude::*;
use std::future::Future;
use tokio::runtime::Runtime;

/// Utility to collect rust futures with GIL released
pub fn wait_for_future<F: Future>(py: Python, f: F) -> F::Output
where
    F: Send,
    F::Output: Send,
{
    let rt = Runtime::new().unwrap();
    py.allow_threads(|| rt.block_on(f))
}

pub(crate) fn parse_volatility(value: &str) -> Result<Volatility, DataFusionError> {
    Ok(match value {
        "immutable" => Volatility::Immutable,
        "stable" => Volatility::Stable,
        "volatile" => Volatility::Volatile,
        value => {
            return Err(DataFusionError::Common(format!(
                "Unsupportad volatility type: `{}`, supported \
                 values are: immutable, stable and volatile.",
                value
            )))
        }
    })
}