int main(void){
Index idx;
idx.readFile("dict.dat");
idx.createIndex("dict.idx");
return 0;
}
int main()
{
Index IndexManager;
index_node_t insertNode[10], res;
insertNode[0].value = "1100012957";
insertNode[0].offset = 16;
insertNode[1].value = "1100012950";
insertNode[1].offset = 0;
insertNode[2].value = "1100099999";
insertNode[2].offset = 8;
attr_t attr;
attr.name = "学号";
attr.isPrimary = true;
attr.length = 8;
attr.type = INT;
condition_tree_t *cNode = new condition_tree_t;
cNode->leftOperand = "学号";
// 建立索引
cout << "---建立索引：" << endl;
IndexManager.createIndex("Persons", "学号", attr);
cout << endl;
// 插入索引项
cout << "---插入索引项：" << endl;
IndexManager.insertIndex("Persons", "学号", insertNode[0]);
IndexManager.insertIndex("Persons", "学号", insertNode[1]);
IndexManager.insertIndex("Persons", "学号", insertNode[2]);
cout << endl;
IndexManager.debugPrint("Persons", "学号");
// 查找索引项
cout << "---查找索引项：" << endl;
cNode->opName = EQ;
cNode->rightOperand = "1100012957";
IndexManager.selectIndex("Persons", cNode, &res);
printNode(&res);
cNode->opName = NE;
cNode->rightOperand = "1100012957";
IndexManager.selectIndex("Persons", cNode, &res);
printNode(&res);
cNode->opName = GT;
cNode->rightOperand = "1100012957";
IndexManager.selectIndex("Persons", cNode, &res);
printNode(&res);
cNode->opName = LT;
cNode->rightOperand = "1100099999";
IndexManager.selectIndex("Persons", cNode, &res);
printNode(&res);
cNode->opName = GTE;
cNode->rightOperand = "1100012957";
IndexManager.selectIndex("Persons", cNode, &res);
printNode(&res);
cNode->opName = LTE;
cNode->rightOperand = "1100012957";
IndexManager.selectIndex("Persons", cNode, &res);
printNode(&res);
cout << endl;
// 删除索引项
cout << "---删除索引项：" << endl;
IndexManager.deleteIndex("Persons", "学号", "1100012957");
cout << endl;
// 更新索引项
cout << "---更新索引项：" << endl;
IndexManager.updateIndex("Persons", "学号", "1100099999", "1100199999");
cout << endl;
IndexManager.debugPrint("Persons", "学号");
// 查找索引项
cout << "---查找索引项：" << endl;
cNode->opName = GTE;
cNode->rightOperand = "1100012949";
IndexManager.selectIndex("Persons", cNode, &res);
printNode(&res);
cout << endl;
// 恢复一条索引
IndexManager.insertIndex("Persons", "学号", insertNode[2]);
IndexManager.debugPrint("Persons", "学号");
// OR 合并索引列表
index_node_t ORres, ORres1, ORres2;
cout << "---OR 合并索引列表：" << endl;
cNode->opName = GTE;
cNode->rightOperand = "1100012999";
IndexManager.selectIndex("Persons", cNode, &ORres);
printNode(&ORres);
cNode->opName = LTE;
cNode->rightOperand = "1100012950";
IndexManager.selectIndex("Persons", cNode, &ORres1);
printNode(&ORres1);
index_node_t **tmp = new index_node_t * [2];
tmp[0] = &ORres;
tmp[1] = &ORres1;
IndexManager.mergeIndexOR(tmp, 2, &ORres2);
printNode(&ORres2);
delete [] tmp;
cout << endl;
// 恢复一条索引
IndexManager.updateIndex("Persons", "学号", "1100012950", "1100012957");
// AND 合并索引列表
index_node_t ANDres, ANDres1, ANDres2;
cout << "---AND 合并索引列表：" << endl;
cNode->opName = GTE;
cNode->rightOperand = "1100012957";
IndexManager.selectIndex("Persons", cNode, &ANDres);
printNode(&ANDres);
cNode->opName = EQ;
cNode->rightOperand = "1100012957";
IndexManager.selectIndex("Persons", cNode, &ANDres1);
printNode(&ANDres1);
tmp = new index_node_t * [2];
tmp[0] = &ANDres;
tmp[1] = &ANDres1;
IndexManager.mergeIndexAND(tmp, 2, &ANDres2);
printNode(&ANDres2);
delete [] tmp;
cout << endl;
// 尝试搜索具有相同关键码的多个索引项
index_node_t selRes;
cout << "---搜索具有相同关键码的多个索引项：" << endl;
IndexManager.insertIndex("Persons", "学号", insertNode[2]);
IndexManager.insertIndex("Persons", "学号", insertNode[2]);
IndexManager.insertIndex("Persons", "学号", insertNode[2]);
cNode->opName = EQ;
cNode->rightOperand = "1100099999";
IndexManager.selectIndex("Persons", cNode, &selRes);
printNode(&selRes);
// 删除一条索引后再搜索
IndexManager.deleteIndex("Persons", "学号", "1100099999");
IndexManager.debugPrint("Persons", "学号");
cNode->opName = GT;
cNode->rightOperand = "1100012956";
IndexManager.selectIndex("Persons", cNode, &selRes);
printNode(&selRes);
cout << endl;
// 更新索引项
cout << "---更新索引项：" << endl;
IndexManager.updateIndex("Persons", "学号", "1100099999", "1100199999");
cout << endl;
IndexManager.debugPrint("Persons", "学号");
return 0;
}
