libmysql

mysql C API - mysql_stmt_fetch throw exception: access violation write at 0x00000008

由 浪子不回头ぞ 提交于 2020-01-06 13:12:33
问题 I'm getting "Unhandled exception at 0x0369AF03 (libmysql.dll) in node.exe: 0xC0000005: Access violation writing location 0x00000008." error message while using mysql C API in a loop. Environment: Windows 7 32bit, Mysql 5.6 The error only occurs in Debug mode, in release mode, it passed and fetched result, this is very weird. I googled, and set the STMT_ATTR_CURSOR_TYPE, but it's the same Please advise, thanks! code: prepare statement static const char *sql_odb_read = "SELECT `type`, `size`,

MySQL Connector/C++ hangs on read()

由 别来无恙 提交于 2019-12-25 06:32:30
问题 I am writing a multi-threaded application in C++ using Boost threads (pthread). The application spawns 100 threads and each thread does the following task (I am writing a code snippet that will be running in each thread): try { driver = get_driver_instance(); con = driver->connect(SettingsClass.HostName, \ SettingsClass.UserName,SettingsClass.Password); // SettingsClass is a global static class whose members // (HostName, UserName, Password, etc) are initialized once // before *any* thread is

Fail to build mysql connector/c (libmysql) from source in cygwin

由 点点圈 提交于 2019-12-24 00:35:12
问题 I am trying to build MySQL's "Connector/C" from source in cygwin and there are problems. -some context- We could talk a lot about why anyone would want use libmysql in cygwin. In this case, it is just simpler to do some unix development on a windows box with the cygwin tool set. From my research, it looks like I could get an older version (5.1, maybe) of the connector to build OK. But cygwin support trailed off when the MySQL developers switched from ./configure to cmake driven build

Perl MYSQL Error : libmysql.dll

由 蓝咒 提交于 2019-12-23 05:08:08
问题 Have you ever met this error when code Perl to access db MYSQL : The procedure entry point mysql_get_parameters could not be located in libmysql_.dll ? I already copied libmysql.dll from D:\xampp\mysql\lib\ to many places and renamed it to libmysql_.dll: - D:\xampp\perl\vendor\lib\auto\DBD\mysql\ - C:\WINDOWS\System32\ But still Entry Point Not Found -.-' Please help ... Regards, Christine 回答1: Download Strawberry Perl from http://strawberryperl.com/ Install it on your PC Find libmysql_.dll

g++ compile static with OpenSSL and MySQLClient

由 不羁的心 提交于 2019-12-13 17:31:02
问题 I have been looking for this issue on the internet, but can't find a solution. What I'm trying to achieve is to build a CGI-application with both dependencies of OpenSSL and MySQLClient . When I compile my program, with the following command: g++ -Wall -o test.cgi test.cpp -I/usr/include/mysql -lcgicc -lmysqlcppconn -lmysqlclient -lcurl -lnghttp2 -lssl -lcrypto -lpthread -ldl -DCURL_STATICLIB -std=c++11 -lz -static I get the following error: //usr/local/lib/libcrypto.a(err.o): In function

Valgrind: libmysql example program gives 'still reachable:' leak

由 泪湿孤枕 提交于 2019-12-13 01:24:59
问题 I was using libmysql in a project and I always see the exact leak summary 'still reachable: 73,944 bytes in 21 blocks' every time in Valgrind, which shouldn't be there. Later I tested this sample program from this link: /* Simple C program that connects to MySQL Database server*/ #include <mysql.h> #include <stdio.h> main() { MYSQL *conn; MYSQL_RES *res; MYSQL_ROW row; char *server = "localhost"; char *user = "root"; char *password = "PASSWORD"; /* set me first */ char *database = "mysql";

What is difference between libmysqlclient.a and libmysqlclient_r.a?

由 心已入冬 提交于 2019-12-08 17:45:27
问题 Which should I use to link for mysqlclient library? What is the difference between them? I can't seem to find the answer. Thanks. 回答1: libmysqlclient_r.a is thread-safe 回答2: Newer versions of the MySQL client distributions do not include the "_r" version. Some may have a symbolic link from libmyqslclient_r.a to libmyqslclient.a 回答3: libmysqlclient_r.a is "re-entrant". https://en.wikipedia.org/wiki/Reentrant_%28subroutine%29 But as Garret pointed out, there is no difference in newer versions

Linux - Dependency libmysqlclient.so.15 not found

由 时光总嘲笑我的痴心妄想 提交于 2019-12-02 10:14:35
问题 I start the instalation, now i receive a error for file dependencies see: root@ca [~/sitebuilder]# rpm -Uhv updates/*.rpm error: Failed dependencies: libmysqlclient.so.15()(64bit) is needed by php5sb-5.2.1-10swsoft.x86_64 libmysqlclient.so.15(libmysqlclient_15)(64bit) is needed by php5sb-5.2.1-10swsoft.x86_64 How to install a libmysqlclient.so.15 dependence on centos? Thanks. 回答1: I have encountered this problem before. I checked libmysqlclient.so version, it's libmysqlclient.so.16 but not

Linux - Dependency libmysqlclient.so.15 not found

由 可紊 提交于 2019-12-02 03:56:09
I start the instalation, now i receive a error for file dependencies see: root@ca [~/sitebuilder]# rpm -Uhv updates/*.rpm error: Failed dependencies: libmysqlclient.so.15()(64bit) is needed by php5sb-5.2.1-10swsoft.x86_64 libmysqlclient.so.15(libmysqlclient_15)(64bit) is needed by php5sb-5.2.1-10swsoft.x86_64 How to install a libmysqlclient.so.15 dependence on centos? Thanks. I have encountered this problem before. I checked libmysqlclient.so version, it's libmysqlclient.so.16 but not libmysqlclient.so.15. so I used MySQL-shared-compat rpm package to solve this. run: #rpm -qp --provides MySQL

“set names” vs mysqli_set_charset — besides affecting mysqli_escape_string, are they identical?

由 倖福魔咒の 提交于 2019-11-30 17:52:59
It seems to be common knowledge to use mysql_set_charset / mysqli::set_charset instead of the direct MySQL query set names . The reason often cited is that set names is insecure because the encoding used for mysql_real_escape_string / mysqli::real_escape_string will only be set by a call to mysql_set_charset / mysqli::set_charset . (Another reason cited is that the PHP docs says it's "not recommended" § .) However, is it safe to use the direct MySQL query set names if we use prepared statements andor other means of escaping besides mysql_real_escape_string / mysqli::real_escape_string / mysqli
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