mirror of https://gitee.com/bigwinds/arangodb
125 lines
3.7 KiB
C
125 lines
3.7 KiB
C
////////////////////////////////////////////////////////////////////////////////
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/// @brief joins
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///
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/// @file
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///
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/// DISCLAIMER
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///
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/// Copyright 2010-2012 triagens GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// 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, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is triAGENS GmbH, Cologne, Germany
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///
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/// @author Jan Steemann
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/// @author Copyright 2012, triagens GmbH, Cologne, Germany
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////////////////////////////////////////////////////////////////////////////////
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#include "VocBase/join.h"
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////////////////////////////////////////////////////////////////////////////////
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/// @addtogroup VocBase
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/// @{
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////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Free join part memory
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////////////////////////////////////////////////////////////////////////////////
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static void FreePart (TRI_join_part_t* part) {
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if (part->_alias) {
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TRI_Free(part->_alias);
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}
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if (part->_collectionName) {
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TRI_Free(part->_collectionName);
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}
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TRI_Free(part);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Free join memory
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////////////////////////////////////////////////////////////////////////////////
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static void FreeSelectJoin (TRI_select_join_t* join) {
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TRI_join_part_t* part;
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size_t i;
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for (i = 0; i < join->_parts._length; i++) {
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part = (TRI_join_part_t*) join->_parts._buffer[i];
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part->free(part);
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}
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TRI_DestroyVectorPointer(&join->_parts);
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TRI_Free(join);
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Add a part to a select join
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////////////////////////////////////////////////////////////////////////////////
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bool TRI_AddPartSelectJoin (TRI_select_join_t* join, const TRI_join_type_e type,
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TRI_qry_where_t* condition, char* collectionName,
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char* alias) {
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TRI_join_part_t* part;
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assert(join != 0);
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part = (TRI_join_part_t*) TRI_Allocate(sizeof(TRI_join_part_t));
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if (part == 0) {
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return false;
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}
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part->_type = type;
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part->_condition = condition;
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part->_collection = 0;
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part->_collectionName = TRI_DuplicateString(collectionName);
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part->_alias = TRI_DuplicateString(alias);
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part->free = FreePart;
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TRI_PushBackVectorPointer(&join->_parts, part);
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Create a new join
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////////////////////////////////////////////////////////////////////////////////
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TRI_select_join_t* TRI_CreateSelectJoin (void) {
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TRI_select_join_t* join;
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join = (TRI_select_join_t*) TRI_Allocate(sizeof(TRI_select_join_t));
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if (join == NULL) {
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return NULL;
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}
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TRI_InitVectorPointer(&join->_parts);
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join->free = FreeSelectJoin;
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return join;
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}
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////////////////////////////////////////////////////////////////////////////////
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/// @}
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////////////////////////////////////////////////////////////////////////////////
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// Local Variables:
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// mode: outline-minor
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// outline-regexp: "^\\(/// @brief\\|/// {@inheritDoc}\\|/// @addtogroup\\|// --SECTION--\\|/// @\\}\\)"
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// End:
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