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DeleteOperator.hpp
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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.
**/
#ifndef QUICKSTEP_RELATIONAL_OPERATORS_DELETE_OPERATOR_HPP_
#define QUICKSTEP_RELATIONAL_OPERATORS_DELETE_OPERATOR_HPP_
#include <cstddef>
#include <string>
#include <vector>
#include "catalog/CatalogRelation.hpp"
#include "catalog/CatalogTypedefs.hpp"
#include "catalog/PartitionScheme.hpp"
#include "query_execution/QueryContext.hpp"
#include "query_execution/QueryExecutionTypedefs.hpp"
#include "relational_operators/RelationalOperator.hpp"
#include "relational_operators/WorkOrder.hpp"
#include "storage/StorageBlockInfo.hpp"
#include "utility/Macros.hpp"
#include "glog/logging.h"
#include "tmb/id_typedefs.h"
namespace tmb { class MessageBus; }
namespace quickstep {
class CatalogRelationSchema;
class Predicate;
class StorageManager;
class WorkOrderProtosContainer;
class WorkOrdersContainer;
namespace serialization { class WorkOrder; }
/** \addtogroup RelationalOperators
* @{
*/
/**
* @brief An operator which deletes some tuples.
**/
class DeleteOperator : public RelationalOperator {
public:
/**
* @brief Constructor.
*
* @param query_id The ID of the query to which this operator belongs.
* @param relation The relation to perform the DELETE over.
* @param predicate_index The index of Predicate in QueryContext. All tuples
* matching pred will be deleted (If kInvalidPredicateId, then all
* tuples will be deleted).
* @param relation_is_stored If relation is a stored relation and is fully
* available to the operator before it can start generating workorders.
**/
DeleteOperator(const std::size_t query_id,
const CatalogRelation &relation,
const QueryContext::predicate_id predicate_index,
const bool relation_is_stored)
: RelationalOperator(query_id, relation.getNumPartitions(), false /* has_repartition */,
relation.getNumPartitions()),
relation_(relation),
predicate_index_(predicate_index),
relation_is_stored_(relation_is_stored),
started_(false),
relation_block_ids_(num_partitions_),
num_workorders_generated_(num_partitions_) {
if (relation_is_stored) {
if (relation.hasPartitionScheme()) {
const PartitionScheme &part_scheme = *relation.getPartitionScheme();
for (partition_id part_id = 0; part_id < num_partitions_; ++part_id) {
relation_block_ids_[part_id] = part_scheme.getBlocksInPartition(part_id);
}
} else {
DCHECK_EQ(1u, num_partitions_);
relation_block_ids_[0] = relation.getBlocksSnapshot();
}
}
}
~DeleteOperator() override {}
OperatorType getOperatorType() const override {
return kDelete;
}
std::string getName() const override {
return "DeleteOperator";
}
bool getAllWorkOrders(WorkOrdersContainer *container,
QueryContext *query_context,
StorageManager *storage_manager,
const tmb::client_id scheduler_client_id,
tmb::MessageBus *bus) override;
bool getAllWorkOrderProtos(WorkOrderProtosContainer *container) override;
const relation_id getOutputRelationID() const override {
return relation_.getID();
}
void feedInputBlock(const block_id input_block_id, const relation_id input_relation_id,
const partition_id part_id) override {
DCHECK(!relation_is_stored_);
relation_block_ids_[part_id].push_back(input_block_id);
}
private:
/**
* @brief Create Work Order proto.
*
* @param part_id The partition id.
* @param block The block id used in the Work Order.
**/
serialization::WorkOrder* createWorkOrderProto(const partition_id part_id, const block_id block);
const CatalogRelation &relation_;
const QueryContext::predicate_id predicate_index_;
const bool relation_is_stored_;
bool started_;
std::vector<std::vector<block_id>> relation_block_ids_;
std::vector<std::size_t> num_workorders_generated_;
DISALLOW_COPY_AND_ASSIGN(DeleteOperator);
};
/**
* @brief A WorkOrder produced by DeleteOperator.
**/
class DeleteWorkOrder : public WorkOrder {
public:
/**
* @brief Constructor.
*
* @param query_id The ID of the query to which this workorder belongs.
* @param input_relation The relation to perform the DELETE over.
* @param part_id The partition id.
* @param input_block_id The block Id.
* @param predicate All tuples matching \c predicate will be deleted (If
* NULL, then all tuples will be deleted).
* @param storage_manager The StorageManager to use.
* @param delete_operator_index The index of the Delete Operator in the query
* plan DAG.
* @param scheduler_client_id The TMB client ID of the scheduler thread.
* @param bus A pointer to the TMB.
**/
DeleteWorkOrder(const std::size_t query_id,
const CatalogRelationSchema &input_relation,
const partition_id part_id,
const block_id input_block_id,
const Predicate *predicate,
StorageManager *storage_manager,
const std::size_t delete_operator_index,
const tmb::client_id scheduler_client_id,
MessageBus *bus)
: WorkOrder(query_id, part_id),
input_relation_(input_relation),
input_block_id_(input_block_id),
predicate_(predicate),
storage_manager_(DCHECK_NOTNULL(storage_manager)),
delete_operator_index_(delete_operator_index),
scheduler_client_id_(scheduler_client_id),
bus_(DCHECK_NOTNULL(bus)) {}
~DeleteWorkOrder() override {}
void execute() override;
private:
const CatalogRelationSchema &input_relation_;
const block_id input_block_id_;
const Predicate *predicate_;
StorageManager *storage_manager_;
const std::size_t delete_operator_index_;
const tmb::client_id scheduler_client_id_;
MessageBus *bus_;
DISALLOW_COPY_AND_ASSIGN(DeleteWorkOrder);
};
/** @} */
} // namespace quickstep
#endif // QUICKSTEP_RELATIONAL_OPERATORS_DELETE_OPERATOR_HPP_