118 lines
4.5 KiB
C++
118 lines
4.5 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#ifndef DORIS_BE_RUNTIME_TUPLE_ROW_H
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#define DORIS_BE_RUNTIME_TUPLE_ROW_H
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#include "runtime/descriptors.h"
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#include "runtime/mem_pool.h"
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#include "runtime/tuple.h"
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namespace doris {
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// A TupleRow encapsulates a contiguous sequence of Tuple pointers which
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// together make up a row.
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class TupleRow {
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public:
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Tuple* get_tuple(int tuple_idx) { return _tuples[tuple_idx]; }
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void set_tuple(int tuple_idx, Tuple* tuple) { _tuples[tuple_idx] = tuple; }
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static TupleRow* create(const std::vector<TupleDescriptor*>& descs, MemPool* pool) {
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int size = descs.size() * sizeof(Tuple*);
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return reinterpret_cast<TupleRow*>(pool->allocate(size));
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}
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// Create a deep copy of this TupleRow. deep_copy will allocate from the pool.
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TupleRow* deep_copy(const std::vector<TupleDescriptor*>& descs, MemPool* pool) {
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int size = descs.size() * sizeof(Tuple*);
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TupleRow* result = reinterpret_cast<TupleRow*>(pool->allocate(size));
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deep_copy(result, descs, pool, false);
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return result;
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}
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// Create a deep copy of this TupleRow into 'dst'. deep_copy will allocate from
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// the MemPool and copy the tuple pointers, the tuples and the string data in the
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// tuples.
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// If reuse_tuple_mem is true, it is assumed the dst TupleRow has already allocated
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// tuple memory and that memory will be reused. Otherwise, new tuples will be allocated
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// and stored in 'dst'.
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void deep_copy(TupleRow* dst, const std::vector<TupleDescriptor*>& descs, MemPool* pool,
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bool reuse_tuple_mem) {
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for (int i = 0; i < descs.size(); ++i) {
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if (this->get_tuple(i) != NULL) {
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if (reuse_tuple_mem && dst->get_tuple(i) != NULL) {
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this->get_tuple(i)->deep_copy(dst->get_tuple(i), *descs[i], pool);
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} else {
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dst->set_tuple(i, this->get_tuple(i)->deep_copy(*descs[i], pool));
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}
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} else {
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// TODO: this is wasteful. If we have 'reuse_tuple_mem', we should be able
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// to save the tuple buffer and reuse it (i.e. freelist).
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dst->set_tuple(i, NULL);
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}
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}
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}
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TupleRow* dcopy_with_new(const std::vector<TupleDescriptor*>& descs, MemPool* pool,
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int64_t* bytes) {
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int size = descs.size() * sizeof(Tuple*);
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TupleRow* result = reinterpret_cast<TupleRow*>(pool->allocate(size));
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*bytes = dcopy_with_new(result, descs, pool, false);
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return result;
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}
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int64_t dcopy_with_new(TupleRow* dst, const std::vector<TupleDescriptor*>& descs, MemPool* pool,
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bool reuse_tuple_mem) {
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int64_t bytes = 0;
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for (int i = 0; i < descs.size(); ++i) {
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Tuple* old_tuple = dst->get_tuple(i);
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if (_tuples[i] != NULL) {
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if (reuse_tuple_mem && old_tuple != NULL) {
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bytes += _tuples[i]->dcopy_with_new(dst->get_tuple(i), *descs[i]);
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} else {
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int64_t new_bytes = 0;
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dst->set_tuple(i, _tuples[i]->dcopy_with_new(*descs[i], pool, &new_bytes));
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bytes += new_bytes;
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}
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} else {
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dst->set_tuple(i, NULL);
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}
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}
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return bytes;
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}
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int64_t release_tuples(const std::vector<TupleDescriptor*>& descs) {
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int64_t bytes = 0;
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for (int i = 0; i < descs.size(); ++i) {
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if (_tuples[i] != nullptr) {
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bytes += _tuples[i]->release_string(*descs[i]);
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}
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}
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return bytes;
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}
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std::string to_string(const RowDescriptor& d);
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private:
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Tuple* _tuples[1];
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};
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} // namespace doris
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#endif
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