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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.
#pragma once
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "arrow/status.h"
#include "gandiva/arrow.h"
#include "gandiva/condition.h"
#include "gandiva/configuration.h"
#include "gandiva/selection_vector.h"
#include "gandiva/visibility.h"
namespace gandiva {
class LLVMGenerator;
class FilterCacheKey {
public:
FilterCacheKey(SchemaPtr schema, std::shared_ptr<Configuration> configuration,
Expression& expression);
std::size_t Hash() const { return hash_code_; }
bool operator==(const FilterCacheKey& other) const;
bool operator!=(const FilterCacheKey& other) const { return !(*this == other); }
SchemaPtr schema() const { return schema_; }
std::string ToString() const;
private:
void UpdateUniqifier(const std::string& expr);
const SchemaPtr schema_;
const std::shared_ptr<Configuration> configuration_;
std::string expression_as_string_;
size_t hash_code_;
uint32_t uniqifier_;
};
/// \brief filter records based on a condition.
///
/// A filter is built for a specific schema and condition. Once the filter is built, it
/// can be used to evaluate many row batches.
class GANDIVA_EXPORT Filter {
public:
Filter(std::unique_ptr<LLVMGenerator> llvm_generator, SchemaPtr schema,
std::shared_ptr<Configuration> config);
// Inline dtor will attempt to resolve the destructor for
// LLVMGenerator on MSVC, so we compile the dtor in the object code
~Filter();
/// Build a filter for the given schema and condition, with the default configuration.
///
/// \param[in] schema schema for the record batches, and the condition.
/// \param[in] condition filter condition.
/// \param[out] filter the returned filter object
static Status Make(SchemaPtr schema, ConditionPtr condition,
std::shared_ptr<Filter>* filter) {
return Make(schema, condition, ConfigurationBuilder::DefaultConfiguration(), filter);
}
/// \brief Build a filter for the given schema and condition.
/// Customize the filter with runtime configuration.
///
/// \param[in] schema schema for the record batches, and the condition.
/// \param[in] condition filter conditions.
/// \param[in] config run time configuration.
/// \param[out] filter the returned filter object
static Status Make(SchemaPtr schema, ConditionPtr condition,
std::shared_ptr<Configuration> config,
std::shared_ptr<Filter>* filter);
/// Evaluate the specified record batch, and populate output selection vector.
///
/// \param[in] batch the record batch. schema should be the same as the one in 'Make'
/// \param[in,out] out_selection the selection array with indices of rows that match
/// the condition.
Status Evaluate(const arrow::RecordBatch& batch,
std::shared_ptr<SelectionVector> out_selection);
std::string DumpIR();
private:
std::unique_ptr<LLVMGenerator> llvm_generator_;
SchemaPtr schema_;
std::shared_ptr<Configuration> configuration_;
};
} // namespace gandiva
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