memory leak in taos_query function

[strprincess]

Bug Description memory leak in taos_query function

Expected Behavior no memory leak

Environment:

• OS: windows 11 23H2
• Memory, CPU, current Disk Space 32GB i7-11800H 512GB
• TDengine Version 3.3.2.0

[yu285]

麻烦提供一下复现的代码和具体泄漏的细节，多谢配合。

[strprincess]

#include <stdio.h>
#include <stdlib.h>
#include "taos.h"
#include <thread>

using namespace std::literals;
/**
 * @brief execute sql and print affected rows.
 *
 * @param taos
 * @param sql
 */
void executeSQL(TAOS* taos, const char* sql) {
    TAOS_RES* res = taos_query(taos, sql);
    int       code = taos_errno(res);
    if(code != 0) {
        printf("Error code: %d; Message: %s\n", code, taos_errstr(res));
        taos_free_result(res);
        taos_close(taos);
        exit(EXIT_FAILURE);
    }
    int affectedRows = taos_affected_rows(res);
    printf("affected rows %d\n", affectedRows);
    taos_free_result(res);
}

int main() {
    TAOS* taos = taos_connect("192.168.179.176", "root", "taosdata", NULL, 6030);
    if(taos == NULL) {
        printf("failed to connect to server\n");
        exit(EXIT_FAILURE);
    }
    std::this_thread::sleep_for(10s);
    //executeSQL(taos, "CREATE DATABASE power");
    executeSQL(taos, "USE power");
    //executeSQL(taos, "CREATE STABLE meters (ts TIMESTAMP, current FLOAT, voltage INT, phase FLOAT) TAGS (location BINARY(64), groupId INT)");
    executeSQL(taos, "INSERT INTO d1001 USING meters TAGS('California.SanFrancisco', 2) VALUES ('2018-10-03 14:38:05.000', 10.30000, 219, 0.31000) ('2018-10-03 14:38:15.000', 12.60000, 218, 0.33000) ('2018-10-03 14:38:16.800', 12.30000, 221, 0.31000)"
        "d1002 USING meters TAGS('California.SanFrancisco', 3) VALUES ('2018-10-03 14:38:16.650', 10.30000, 218, 0.25000)"
        "d1003 USING meters TAGS('California.LosAngeles', 2) VALUES ('2018-10-03 14:38:05.500', 11.80000, 221, 0.28000) ('2018-10-03 14:38:16.600', 13.40000, 223, 0.29000)"
        "d1004 USING meters TAGS('California.LosAngeles', 3) VALUES ('2018-10-03 14:38:05.000', 10.80000, 223, 0.29000) ('2018-10-03 14:38:06.500', 11.50000, 221, 0.35000)");
    printf("successfully inserted\n");
    std::this_thread::sleep_for(10s);
    taos_close(taos);
    taos_cleanup();
}

链接taos.lib，使用vs 2022 x64 编译，在性能探查器里监测内存使用，结果如下：

[strprincess]

我调用没加taos_free_result，现在ok了

[strprincess]

我调用没加taos_free_result，现在ok了