vortex-array 0.59.4

Vortex in memory columnar data format
Documentation 
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// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: Copyright the Vortex contributors

use vortex_error::VortexResult;

use crate::Array;
use crate::ArrayRef;
use crate::ExecutionCtx;
use crate::arrays::ConstantArray;
use crate::arrays::ExtensionArray;
use crate::arrays::ExtensionVTable;
use crate::compute;
use crate::compute::Operator;
use crate::expr::CompareKernel;

impl CompareKernel for ExtensionVTable {
    fn compare(
        lhs: &ExtensionArray,
        rhs: &dyn Array,
        operator: Operator,
        _ctx: &mut ExecutionCtx,
    ) -> VortexResult<Option<ArrayRef>> {
        // If the RHS is a constant, we can extract the storage scalar.
        if let Some(const_ext) = rhs.as_constant() {
            let storage_scalar = const_ext.as_extension().to_storage_scalar();
            return compute::compare(
                lhs.storage(),
                ConstantArray::new(storage_scalar, lhs.len()).as_ref(),
                operator,
            )
            .map(Some);
        }

        // If the RHS is an extension array matching ours, we can extract the storage.
        if let Some(rhs_ext) = rhs.as_opt::<ExtensionVTable>() {
            return compute::compare(lhs.storage(), rhs_ext.storage(), operator).map(Some);
        }

        // Otherwise, we need the RHS to handle this comparison.
        Ok(None)
    }
}