src/expr/placeholder.rs

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// to you under the Apache License, Version 2.0 (the
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// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
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use datafusion::logical_expr::expr::Placeholder;
use pyo3::prelude::*;

use crate::common::data_type::PyDataType;

#[pyclass(name = "Placeholder", module = "datafusion.expr", subclass)]
#[derive(Clone)]
pub struct PyPlaceholder {
    placeholder: Placeholder,
}

impl From<Placeholder> for PyPlaceholder {
    fn from(placeholder: Placeholder) -> Self {
        PyPlaceholder { placeholder }
    }
}

#[pymethods]
impl PyPlaceholder {
    fn id(&self) -> String {
        self.placeholder.id.clone()
    }

    fn data_type(&self) -> Option<PyDataType> {
        self.placeholder
            .data_type
            .as_ref()
            .map(|e| e.clone().into())
    }
}