lance 0.6.5

A columnar data format that is 100x faster than Parquet for random access.
Documentation 
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// Copyright 2023 Lance Developers.
//
// Licensed 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.

//! Testing Node
//!

use std::any::Any;
use std::sync::Arc;

use arrow_array::RecordBatch;
use datafusion::{
    execution::context::TaskContext,
    physical_plan::{DisplayAs, DisplayFormatType, ExecutionPlan, SendableRecordBatchStream},
};

#[derive(Debug)]
pub struct TestingExec {
    pub(crate) batches: Vec<RecordBatch>,
}

impl TestingExec {
    pub(crate) fn new(batches: Vec<RecordBatch>) -> Self {
        Self { batches }
    }
}

impl DisplayAs for TestingExec {
    fn fmt_as(&self, t: DisplayFormatType, _f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match t {
            DisplayFormatType::Default | DisplayFormatType::Verbose => todo!(),
        }
    }
}

impl ExecutionPlan for TestingExec {
    fn as_any(&self) -> &dyn Any {
        self
    }

    fn schema(&self) -> arrow_schema::SchemaRef {
        self.batches[0].schema()
    }

    fn output_partitioning(&self) -> datafusion::physical_plan::Partitioning {
        todo!()
    }

    fn output_ordering(&self) -> Option<&[datafusion::physical_expr::PhysicalSortExpr]> {
        todo!()
    }

    fn children(&self) -> Vec<Arc<dyn ExecutionPlan>> {
        vec![]
    }

    fn with_new_children(
        self: Arc<Self>,
        _children: Vec<Arc<dyn ExecutionPlan>>,
    ) -> datafusion::error::Result<std::sync::Arc<dyn ExecutionPlan>> {
        todo!()
    }

    fn execute(
        &self,
        _partition: usize,
        _context: Arc<TaskContext>,
    ) -> datafusion::error::Result<SendableRecordBatchStream> {
        todo!()
    }

    fn statistics(&self) -> datafusion::physical_plan::Statistics {
        todo!()
    }
}