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filter.rs
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87 lines (75 loc) · 2.49 KB
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
use datafusion::logical_expr::logical_plan::Filter;
use pyo3::{prelude::*, IntoPyObjectExt};
use std::fmt::{self, Display, Formatter};
use crate::common::df_schema::PyDFSchema;
use crate::expr::logical_node::LogicalNode;
use crate::expr::PyExpr;
use crate::sql::logical::PyLogicalPlan;
#[pyclass(name = "Filter", module = "datafusion.expr", subclass)]
#[derive(Clone)]
pub struct PyFilter {
filter: Filter,
}
impl From<Filter> for PyFilter {
fn from(filter: Filter) -> PyFilter {
PyFilter { filter }
}
}
impl From<PyFilter> for Filter {
fn from(filter: PyFilter) -> Self {
filter.filter
}
}
impl Display for PyFilter {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(
f,
"Filter
Predicate: {:?}
Input: {:?}",
&self.filter.predicate, &self.filter.input
)
}
}
#[pymethods]
impl PyFilter {
/// Retrieves the predicate expression for this `Filter`
fn predicate(&self) -> PyExpr {
PyExpr::from(self.filter.predicate.clone())
}
/// Retrieves the input `LogicalPlan` to this `Filter` node
fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
Ok(Self::inputs(self))
}
/// Resulting Schema for this `Filter` node instance
fn schema(&self) -> PyDFSchema {
self.filter.input.schema().as_ref().clone().into()
}
fn __repr__(&self) -> String {
format!("Filter({self})")
}
}
impl LogicalNode for PyFilter {
fn inputs(&self) -> Vec<PyLogicalPlan> {
vec![PyLogicalPlan::from((*self.filter.input).clone())]
}
fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
self.clone().into_bound_py_any(py)
}
}