MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work

Christian Ehrlicher

@MostafaEzzat said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

D:\Qt\5.15.1\mingw81_32\plugins>

You don't follow the documentation. You have to use a clean source dir an go to the directory src\qtbase\src\plugins\sqldriver ...

MostafaEzzat

@Christian-Ehrlicher

i'm using Qt 5.15.1 and there is no such directory

these all dirs that contains sqldrivers Folder

Christian Ehrlicher

You have to install the qt sources for a qt source dir...

MostafaEzzat

@Christian-Ehrlicher

Ah i see , i'm downloading it right now and try again if it worked i'll delete the post or mark it solved

Thanks

MostafaEzzat

@Christian-Ehrlicher

for sorry it didn't work either

the stpes i made open Qt 5.15.1 (MinGW 8.1.0 32-bit) ( ididnt use cmd at all )
because here is using cmd :https://forum.qt.io/topic/92626/cant-connect-to-mysql-database-qmysql-driver-not-loaded/17

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>qmake -- MYSQL_INCDIR="D:\Connect
or C++ 8.0\include" MYSQL_LIBDIR="D:\Connector C++ 8.0\lib"

Running configuration tests...
Done running configuration tests.

Configure summary:

Qt Sql Drivers:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. no
  OCI (Oracle) ........................... no
  ODBC ................................... yes
  PostgreSQL ............................. no
  SQLite2 ................................ no
  SQLite ................................. yes
    Using system provided SQLite ......... no
  TDS (Sybase) ........................... no

Qt is now configured for building. Just run 'mingw32-make'.
Once everything is built, you must run 'mingw32-make install'.
Qt will be installed into 'D:\Qt\5.15.1\mingw81_32'.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

and this is output of the software

("QSQLITE", "QODBC", "QODBC3", "QPSQL", "QPSQL7")
QSqlDatabase: QMYSQL driver not loaded
QSqlDatabase: available drivers: QSQLITE QODBC QODBC3 QPSQL QPSQL7
"Driver not loaded Driver not loaded"

this forum didn't work at all :https://forum.qt.io/topic/40672/how-to-create-the-plugin-of-mysql-for-qt
, but i downloaded mingw utilities and extract it in mingw81-32/bin

Christian Ehrlicher

@MostafaEzzat said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

MySql .................................. no

The third time: Please follow the documentation!

As you can see mysql was not configured, so take a look at config.log why this is the case. It's all written in the documentation.

MostafaEzzat

@Christian-Ehrlicher said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

As you can see mysql was not configured, so take a look at config.log why this is the case. It's all written in the documentation.

excuse me for annoying ,

i open config file gives me this that mysql_config not found and otherfiles however i installed mysql succcesfully so what should i do

Command line: "MYSQL_INCDIR=D:\Connector C++ 8.0\include" "MYSQL_LIBDIR=D:\Connector C++ 8.0\lib"
Global lib dirs: [C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-win32\\lib C:\\Utils\\postgresql\\pgsql\\lib] [D:/Qt/Tools/mingw810_32/lib/gcc/i686-w64-mingw32/8.1.0 D:/Qt/Tools/mingw810_32/lib/gcc D:/Qt/Tools/mingw810_32/i686-w64-mingw32/lib D:/Qt/Tools/mingw810_32/lib]
Global inc dirs: [C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-win32\\include C:\\Utils\\postgresql\\pgsql\\include] [D:/Qt/Tools/mingw810_32/lib/gcc/i686-w64-mingw32/8.1.0/include/c++ D:/Qt/Tools/mingw810_32/lib/gcc/i686-w64-mingw32/8.1.0/include/c++/i686-w64-mingw32 D:/Qt/Tools/mingw810_32/lib/gcc/i686-w64-mingw32/8.1.0/include/c++/backward D:/Qt/Tools/mingw810_32/lib/gcc/i686-w64-mingw32/8.1.0/include D:/Qt/Tools/mingw810_32/lib/gcc/i686-w64-mingw32/8.1.0/include-fixed D:/Qt/Tools/mingw810_32/i686-w64-mingw32/include]
looking for library db2
Trying source 0 (type inline) of library db2 ...
sqlcli.h not found in [] and global paths.
sqlcli1.h not found in [] and global paths.
  => source produced no result.
Trying source 1 (type inline) of library db2 ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.db2 FAILED
looking for library ibase
Trying source 0 (type inline) of library ibase ...
ibase.h not found in [] and global paths.
  => source produced no result.
Trying source 1 (type inline) of library ibase ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.ibase FAILED
looking for library mysql
Trying source 0 (type mysqlConfig) of library mysql ...
mysql_config not found.
  => source produced no result.
Trying source 1 (type mysqlConfig) of library mysql ...
mysql_config not found.
  => source produced no result.
Trying source 2 (type mysqlConfig) of library mysql ...
mysql_config not found.
  => source produced no result.
Trying source 3 (type mysqlConfig) of library mysql ...
mysql_config not found.
  => source produced no result.
Trying source 4 (type inline) of library mysql ...
  => source failed condition '!config.win32'.
Trying source 5 (type inline) of library mysql ...
+ cd /d D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\mysql && D:\Qt\5.15.1\mingw81_32\bin\qmake.exe "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_LIBDIR += C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-win32\\lib C:\\Utils\\postgresql\\pgsql\\lib" "INCLUDEPATH += C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-win32\\include C:\\Utils\\postgresql\\pgsql\\include" "QMAKE_USE += mysql" "QMAKE_LIBS_MYSQL = \"-LD:\\Connector C++ 8.0\\lib\" -llibmariadb" "QMAKE_INCDIR_MYSQL = \"D:\\Connector C++ 8.0\\include\"" D:/Qt/5.15.1/Src/qtbase/src/plugins/sqldrivers/config.tests/mysql
+ cd /d D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\mysql && set MAKEFLAGS=& mingw32-make clean && set MAKEFLAGS=& mingw32-make
> del main.o
> Could Not Find D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\mysql\main.o
> g++ -c -fno-keep-inline-dllexport -O2 -w -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -I. -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-win32\include -IC:\Utils\postgresql\pgsql\include -I"D:\Connector C++ 8.0\include" -ID:\Qt\5.15.1\mingw81_32\mkspecs\win32-g++  -o main.o main.cpp
> In file included from D:\Connector C++ 8.0\include/mysql.h:80,
>                  from main.cpp:5:
> D:\Connector C++ 8.0\include/mysql_com.h:1034:10: fatal error: mysql/udf_registration_types.h: No such file or directory
>  #include "mysql/udf_registration_types.h"
>           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> compilation terminated.
> mingw32-make: *** [Makefile:454: main.o] Error 1
 => source failed verification.
Trying source 6 (type inline) of library mysql ...
+ cd /d D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\mysql && D:\Qt\5.15.1\mingw81_32\bin\qmake.exe "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_LIBDIR += C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-win32\\lib C:\\Utils\\postgresql\\pgsql\\lib" "INCLUDEPATH += C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-win32\\include C:\\Utils\\postgresql\\pgsql\\include" "QMAKE_USE += mysql" "QMAKE_LIBS_MYSQL = \"-LD:\\Connector C++ 8.0\\lib\" -llibmysql" "QMAKE_INCDIR_MYSQL = \"D:\\Connector C++ 8.0\\include\"" D:/Qt/5.15.1/Src/qtbase/src/plugins/sqldrivers/config.tests/mysql
+ cd /d D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\mysql && set MAKEFLAGS=& mingw32-make clean && set MAKEFLAGS=& mingw32-make
> del main.o
> Could Not Find D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\mysql\main.o
> g++ -c -fno-keep-inline-dllexport -O2 -w -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -I. -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-win32\include -IC:\Utils\postgresql\pgsql\include -I"D:\Connector C++ 8.0\include" -ID:\Qt\5.15.1\mingw81_32\mkspecs\win32-g++  -o main.o main.cpp
> In file included from D:\Connector C++ 8.0\include/mysql.h:80,
>                  from main.cpp:5:
> D:\Connector C++ 8.0\include/mysql_com.h:1034:10: fatal error: mysql/udf_registration_types.h: No such file or directory
>  #include "mysql/udf_registration_types.h"
>           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> compilation terminated.
> mingw32-make: *** [Makefile:454: main.o] Error 1
 => source failed verification.
Trying source 7 (type inline) of library mysql ...
  => source failed condition '!config.win32'.
Trying source 8 (type inline) of library mysql ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.mysql FAILED
looking for library oci
Trying source 0 (type inline) of library oci ...
oci.h not found in [] and global paths.
  => source produced no result.
Trying source 1 (type inline) of library oci ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.oci FAILED
looking for library odbc
Trying source 0 (type inline) of library odbc ...
+ cd /d D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\odbc && D:\Qt\5.15.1\mingw81_32\bin\qmake.exe "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_LIBDIR += C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-win32\\lib C:\\Utils\\postgresql\\pgsql\\lib" "INCLUDEPATH += C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-win32\\include C:\\Utils\\postgresql\\pgsql\\include" "QMAKE_USE += odbc" "QMAKE_LIBS_ODBC = -lodbc32" D:/Qt/5.15.1/Src/qtbase/src/plugins/sqldrivers/config.tests/odbc
+ cd /d D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\odbc && set MAKEFLAGS=& mingw32-make clean && set MAKEFLAGS=& mingw32-make
> del main.o
> g++ -c -fno-keep-inline-dllexport -O2 -w -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -I. -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-win32\include -IC:\Utils\postgresql\pgsql\include -ID:\Qt\5.15.1\mingw81_32\mkspecs\win32-g++  -o main.o main.cpp
> g++ -Wl,-s -Wl,-subsystem,console -mthreads -o odbc.exe main.o  -LC:\openssl\lib -LC:\Utils\my_sql\mysql-5.7.25-win32\lib -LC:\Utils\postgresql\pgsql\lib -lodbc32   
 => source accepted.
test config.sqldrivers.libraries.odbc succeeded
looking for library psql
Trying source 0 (type pkgConfig) of library psql ...
pkg-config use disabled globally.
  => source produced no result.
Trying source 1 (type psqlConfig) of library psql ...
pg_config not found.
  => source produced no result.
Trying source 2 (type psqlEnv) of library psql ...
libpq-fe.h not found in [] and global paths.
  => source produced no result.
Trying source 3 (type psqlEnv) of library psql ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.psql FAILED
looking for library sqlite2
Trying source 0 (type inline) of library sqlite2 ...
sqlite.h not found in [] and global paths.
  => source produced no result.
test config.sqldrivers.libraries.sqlite2 FAILED
looking for library tds
Trying source 0 (type sybaseEnv) of library tds ...
+ cd /d D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\tds && D:\Qt\5.15.1\mingw81_32\bin\qmake.exe "CONFIG -= qt debug_and_release app_bundle lib_bundle" "CONFIG += shared warn_off console single_arch" "QMAKE_LIBDIR += C:\\openssl\\lib C:\\Utils\\my_sql\\mysql-5.7.25-win32\\lib C:\\Utils\\postgresql\\pgsql\\lib" "INCLUDEPATH += C:\\openssl\\include C:\\Utils\\my_sql\\mysql-5.7.25-win32\\include C:\\Utils\\postgresql\\pgsql\\include" "QMAKE_USE += tds" "QMAKE_LIBS_TDS = -lNTWDBLIB" D:/Qt/5.15.1/Src/qtbase/src/plugins/sqldrivers/config.tests/tds
+ cd /d D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\tds && set MAKEFLAGS=& mingw32-make clean && set MAKEFLAGS=& mingw32-make
> del main.o
> Could Not Find D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\config.tests\tds\main.o
> g++ -c -fno-keep-inline-dllexport -O2 -w -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -I. -IC:\openssl\include -IC:\Utils\my_sql\mysql-5.7.25-win32\include -IC:\Utils\postgresql\pgsql\include -ID:\Qt\5.15.1\mingw81_32\mkspecs\win32-g++  -o main.o main.cpp
> main.cpp:2:10: fatal error: sybfront.h: No such file or directory
>  #include <sybfront.h>
>           ^~~~~~~~~~~~
> compilation terminated.
> mingw32-make: *** [Makefile:446: main.o] Error 1
 => source failed verification.
Trying source 1 (type sybaseEnv) of library tds ...
  => source failed condition '!config.win32'.
test config.sqldrivers.libraries.tds FAILED

this config cache

cache.platform = win32-g++
cache.xplatform = win32-g++
cache.db2._KEYS_ = result msgs
cache.db2.result = false
cache.db2.msgs = "Trying source 0 (type inline) of library db2 ..." "sqlcli.h not found in [] and global paths." "sqlcli1.h not found in [] and global paths." "  => source produced no result." "Trying source 1 (type inline) of library db2 ..." "  => source failed condition \'!config.win32\'."
cache.ibase._KEYS_ = result msgs
cache.ibase.result = false
cache.ibase.msgs = "Trying source 0 (type inline) of library ibase ..." "ibase.h not found in [] and global paths." "  => source produced no result." "Trying source 1 (type inline) of library ibase ..." "  => source failed condition \'!config.win32\'."
cache.mysql._KEYS_ = result msgs
cache.mysql.result = false
cache.mysql.msgs = "Trying source 0 (type mysqlConfig) of library mysql ..." "mysql_config not found." "  => source produced no result." "Trying source 1 (type mysqlConfig) of library mysql ..." "mysql_config not found." "  => source produced no result." "Trying source 2 (type mysqlConfig) of library mysql ..." "mysql_config not found." "  => source produced no result." "Trying source 3 (type mysqlConfig) of library mysql ..." "mysql_config not found." "  => source produced no result." "Trying source 4 (type inline) of library mysql ..." "  => source failed condition \'!config.win32\'." "Trying source 5 (type inline) of library mysql ..." "+ cd /d D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\mysql && D:\\Qt\\5.15.1\\mingw81_32\\bin\\qmake.exe \"CONFIG -= qt debug_and_release app_bundle lib_bundle\" \"CONFIG += shared warn_off console single_arch\" \"QMAKE_LIBDIR += C:\\\\openssl\\\\lib C:\\\\Utils\\\\my_sql\\\\mysql-5.7.25-win32\\\\lib C:\\\\Utils\\\\postgresql\\\\pgsql\\\\lib\" \"INCLUDEPATH += C:\\\\openssl\\\\include C:\\\\Utils\\\\my_sql\\\\mysql-5.7.25-win32\\\\include C:\\\\Utils\\\\postgresql\\\\pgsql\\\\include\" \"QMAKE_USE += mysql\" \"QMAKE_LIBS_MYSQL = \\\"-LD:\\\\Connector C++ 8.0\\\\lib\\\" -llibmariadb\" \"QMAKE_INCDIR_MYSQL = \\\"D:\\\\Connector C++ 8.0\\\\include\\\"\" D:/Qt/5.15.1/Src/qtbase/src/plugins/sqldrivers/config.tests/mysql" "+ cd /d D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\mysql && set MAKEFLAGS=& mingw32-make clean && set MAKEFLAGS=& mingw32-make" "> del main.o" "> Could Not Find D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\mysql\\main.o" "> g++ -c -fno-keep-inline-dllexport -O2 -w -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -I. -IC:\\openssl\\include -IC:\\Utils\\my_sql\\mysql-5.7.25-win32\\include -IC:\\Utils\\postgresql\\pgsql\\include -I\"D:\\Connector C++ 8.0\\include\" -ID:\\Qt\\5.15.1\\mingw81_32\\mkspecs\\win32-g++  -o main.o main.cpp" "> In file included from D:\\Connector C++ 8.0\\include/mysql.h:80," ">                  from main.cpp:5:" "> D:\\Connector C++ 8.0\\include/mysql_com.h:1034:10: fatal error: mysql/udf_registration_types.h: No such file or directory" ">  $${LITERAL_HASH}include \"mysql/udf_registration_types.h\"" ">           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" "> compilation terminated." "> mingw32-make: *** [Makefile:454: main.o] Error 1" " => source failed verification." "Trying source 6 (type inline) of library mysql ..." "+ cd /d D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\mysql && D:\\Qt\\5.15.1\\mingw81_32\\bin\\qmake.exe \"CONFIG -= qt debug_and_release app_bundle lib_bundle\" \"CONFIG += shared warn_off console single_arch\" \"QMAKE_LIBDIR += C:\\\\openssl\\\\lib C:\\\\Utils\\\\my_sql\\\\mysql-5.7.25-win32\\\\lib C:\\\\Utils\\\\postgresql\\\\pgsql\\\\lib\" \"INCLUDEPATH += C:\\\\openssl\\\\include C:\\\\Utils\\\\my_sql\\\\mysql-5.7.25-win32\\\\include C:\\\\Utils\\\\postgresql\\\\pgsql\\\\include\" \"QMAKE_USE += mysql\" \"QMAKE_LIBS_MYSQL = \\\"-LD:\\\\Connector C++ 8.0\\\\lib\\\" -llibmysql\" \"QMAKE_INCDIR_MYSQL = \\\"D:\\\\Connector C++ 8.0\\\\include\\\"\" D:/Qt/5.15.1/Src/qtbase/src/plugins/sqldrivers/config.tests/mysql" "+ cd /d D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\mysql && set MAKEFLAGS=& mingw32-make clean && set MAKEFLAGS=& mingw32-make" "> del main.o" "> Could Not Find D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\mysql\\main.o" "> g++ -c -fno-keep-inline-dllexport -O2 -w -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -I. -IC:\\openssl\\include -IC:\\Utils\\my_sql\\mysql-5.7.25-win32\\include -IC:\\Utils\\postgresql\\pgsql\\include -I\"D:\\Connector C++ 8.0\\include\" -ID:\\Qt\\5.15.1\\mingw81_32\\mkspecs\\win32-g++  -o main.o main.cpp" "> In file included from D:\\Connector C++ 8.0\\include/mysql.h:80," ">                  from main.cpp:5:" "> D:\\Connector C++ 8.0\\include/mysql_com.h:1034:10: fatal error: mysql/udf_registration_types.h: No such file or directory" ">  $${LITERAL_HASH}include \"mysql/udf_registration_types.h\"" ">           ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~" "> compilation terminated." "> mingw32-make: *** [Makefile:454: main.o] Error 1" " => source failed verification." "Trying source 7 (type inline) of library mysql ..." "  => source failed condition \'!config.win32\'." "Trying source 8 (type inline) of library mysql ..." "  => source failed condition \'!config.win32\'."
cache.oci._KEYS_ = result msgs
cache.oci.result = false
cache.oci.msgs = "Trying source 0 (type inline) of library oci ..." "oci.h not found in [] and global paths." "  => source produced no result." "Trying source 1 (type inline) of library oci ..." "  => source failed condition \'!config.win32\'."
cache.odbc._KEYS_ = result msgs source sources.0.libs sources.0.includedir sources.0.cflags sources.0.version sources.0.export
cache.odbc.result = true
cache.odbc.msgs = "Trying source 0 (type inline) of library odbc ..." "+ cd /d D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\odbc && D:\\Qt\\5.15.1\\mingw81_32\\bin\\qmake.exe \"CONFIG -= qt debug_and_release app_bundle lib_bundle\" \"CONFIG += shared warn_off console single_arch\" \"QMAKE_LIBDIR += C:\\\\openssl\\\\lib C:\\\\Utils\\\\my_sql\\\\mysql-5.7.25-win32\\\\lib C:\\\\Utils\\\\postgresql\\\\pgsql\\\\lib\" \"INCLUDEPATH += C:\\\\openssl\\\\include C:\\\\Utils\\\\my_sql\\\\mysql-5.7.25-win32\\\\include C:\\\\Utils\\\\postgresql\\\\pgsql\\\\include\" \"QMAKE_USE += odbc\" \"QMAKE_LIBS_ODBC = -lodbc32\" D:/Qt/5.15.1/Src/qtbase/src/plugins/sqldrivers/config.tests/odbc" "+ cd /d D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\odbc && set MAKEFLAGS=& mingw32-make clean && set MAKEFLAGS=& mingw32-make" "> del main.o" "> g++ -c -fno-keep-inline-dllexport -O2 -w -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -I. -IC:\\openssl\\include -IC:\\Utils\\my_sql\\mysql-5.7.25-win32\\include -IC:\\Utils\\postgresql\\pgsql\\include -ID:\\Qt\\5.15.1\\mingw81_32\\mkspecs\\win32-g++  -o main.o main.cpp" "> g++ -Wl,-s -Wl,-subsystem,console -mthreads -o odbc.exe main.o  -LC:\\openssl\\lib -LC:\\Utils\\my_sql\\mysql-5.7.25-win32\\lib -LC:\\Utils\\postgresql\\pgsql\\lib -lodbc32   " " => source accepted."
cache.odbc.source = 0
cache.odbc.sources.0.libs = -lodbc32
cache.odbc.sources.0.includedir = 
cache.odbc.sources.0.cflags = 
cache.odbc.sources.0.version = 
cache.odbc.sources.0.export = 
cache.psql._KEYS_ = result msgs
cache.psql.result = false
cache.psql.msgs = "Trying source 0 (type pkgConfig) of library psql ..." "pkg-config use disabled globally." "  => source produced no result." "Trying source 1 (type psqlConfig) of library psql ..." "pg_config not found." "  => source produced no result." "Trying source 2 (type psqlEnv) of library psql ..." "libpq-fe.h not found in [] and global paths." "  => source produced no result." "Trying source 3 (type psqlEnv) of library psql ..." "  => source failed condition \'!config.win32\'."
cache.sqlite2._KEYS_ = result msgs
cache.sqlite2.result = false
cache.sqlite2.msgs = "Trying source 0 (type inline) of library sqlite2 ..." "sqlite.h not found in [] and global paths." "  => source produced no result."
cache.tds._KEYS_ = result msgs
cache.tds.result = false
cache.tds.msgs = "Trying source 0 (type sybaseEnv) of library tds ..." "+ cd /d D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\tds && D:\\Qt\\5.15.1\\mingw81_32\\bin\\qmake.exe \"CONFIG -= qt debug_and_release app_bundle lib_bundle\" \"CONFIG += shared warn_off console single_arch\" \"QMAKE_LIBDIR += C:\\\\openssl\\\\lib C:\\\\Utils\\\\my_sql\\\\mysql-5.7.25-win32\\\\lib C:\\\\Utils\\\\postgresql\\\\pgsql\\\\lib\" \"INCLUDEPATH += C:\\\\openssl\\\\include C:\\\\Utils\\\\my_sql\\\\mysql-5.7.25-win32\\\\include C:\\\\Utils\\\\postgresql\\\\pgsql\\\\include\" \"QMAKE_USE += tds\" \"QMAKE_LIBS_TDS = -lNTWDBLIB\" D:/Qt/5.15.1/Src/qtbase/src/plugins/sqldrivers/config.tests/tds" "+ cd /d D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\tds && set MAKEFLAGS=& mingw32-make clean && set MAKEFLAGS=& mingw32-make" "> del main.o" "> Could Not Find D:\\Qt\\5.15.1\\Src\\qtbase\\src\\plugins\\sqldrivers\\config.tests\\tds\\main.o" "> g++ -c -fno-keep-inline-dllexport -O2 -w -fexceptions -mthreads -DUNICODE -D_UNICODE -DWIN32 -DMINGW_HAS_SECURE_API=1 -I. -IC:\\openssl\\include -IC:\\Utils\\my_sql\\mysql-5.7.25-win32\\include -IC:\\Utils\\postgresql\\pgsql\\include -ID:\\Qt\\5.15.1\\mingw81_32\\mkspecs\\win32-g++  -o main.o main.cpp" "> main.cpp:2:10: fatal error: sybfront.h: No such file or directory" ">  $${LITERAL_HASH}include <sybfront.h>" ">           ^~~~~~~~~~~~" "> compilation terminated." "> mingw32-make: *** [Makefile:446: main.o] Error 1" " => source failed verification." "Trying source 1 (type sybaseEnv) of library tds ..." "  => source failed condition \'!config.win32\'."

Christian Ehrlicher

@MostafaEzzat said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

D:\Connector C++ 8.0\include/mysql_com.h:1034:10: fatal error: mysql/udf_registration_types.h: No such file or directory
#include "mysql/udf_registration_types.h"

Read the logs.

MostafaEzzat

@Christian-Ehrlicher

i changed to mariadb because mysql client has alot of missing files

so i used

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>qmake -- MYSQL_INCDIR="C:\Program Files (x86)\MariaDB 10.0\include\mysql" MYSQL_LIBDIR="C:\Program Files (x86)\MariaDB 10.0\lib"
 
and MYSql detected 
then 
mingw32-make sub-mysql
then 
mingw32-make install

and everything went very well

and i copied
qsqlmysql4.dll
qsqlmysql.dl
libqsqlmysql.a

to dir D:\Qt\5.15.1\mingw81_32\bin

i test the software get

QSqlDatabase: available drivers: QSQLITE QMARIADB QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
QSqlDatabasePrivate::addDatabase: duplicate connection name 'SecConnection', old connection removed.
Donnne
"Driver not loaded Driver not loaded"

i have these files in D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers\plugins\sqldrivers

in this piece of code

Databas =   QSqlDatabase::addDatabase("QMYSQL", "SecConnection");

or this

    Databas =   QSqlDatabase::addDatabase("QMARIADB", "SecConnection");

it gives me "Driver not loaded Driver not loaded"

when i use QODBC or QSQLITE

it loads successfully

so where is the problem i just want the diver to load and how to make it recognize Mariadb only

Thanks in advance

MostafaEzzat

@MostafaEzzat said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

qmake -- MYSQL_INCDIR="C:\Program Files (x86)\MariaDB 10.0\include\mysql" MYSQL_LIBDIR="C:\Program Files (x86)\MariaDB 10.0\lib"

Setting up environment for Qt usage...

D:\Qt\5.15.1\mingw81_32>cd D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>qmake -- MYSQL_INCDIR="C:\Program
 Files (x86)\MariaDB 10.0\include\mysql" MYSQL_LIBDIR="C:\Program Files (x86)\Ma
riaDB 10.0\lib"

Running configuration tests...
Done running configuration tests.

Configure summary:

Qt Sql Drivers:
  DB2 (IBM) .............................. no
  InterBase .............................. no
  MySql .................................. yes
  OCI (Oracle) ........................... no
  ODBC ................................... yes
  PostgreSQL ............................. no
  SQLite2 ................................ no
  SQLite ................................. yes
    Using system provided SQLite ......... no
  TDS (Sybase) ........................... no

Qt is now configured for building. Just run 'mingw32-make'.
Once everything is built, you must run 'mingw32-make install'.
Qt will be installed into 'D:\Qt\5.15.1\mingw81_32'.

Prior to reconfiguration, make sure you remove any leftovers from
the previous build.

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>

this's the command result for sure after that i used

mingw32-make sub-mysql
mingw32-make install

JonB

@MostafaEzzat
If you are having a "Driver not loaded" and don't know why, run your executable with environment variable QT_DEBUG_PLUGINS=1 for diagnostic information.

MostafaEzzat

@JonB

Sorry where should i put this variable QT_DEBUG_PLUGINS=1

do you mean by the environment .pro file ? or Options in qtcreator

jsulm

@MostafaEzzat If you start from QtCreator then set it under "Projects/Build & Run/Run/Run Environment"

MostafaEzzat

@jsulm

ok i went to Build Enviroment and added it , this output it seems it doesn't search for any sql plugins even he didn't search in

qtbase/src/plugins/sqldrivers

14:27:19: Starting C:\Users\Mostafa\Downloads\HospitalSoftware Last Version\build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug\debug\Hospital-ClinicSoftware.exe ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/platforms" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qdirect2d.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platforms/qdirect2d.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "direct2d"
        ]
    },
    "archreq": 0,
    "className": "QWindowsDirect2DIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("direct2d")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qminimal.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platforms/qminimal.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "minimal"
        ]
    },
    "archreq": 0,
    "className": "QMinimalIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("minimal")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qoffscreen.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platforms/qoffscreen.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "offscreen"
        ]
    },
    "archreq": 0,
    "className": "QOffscreenIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("offscreen")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qwindows.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platforms/qwindows.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformIntegrationFactoryInterface.5.3",
    "MetaData": {
        "Keys": [
            "windows"
        ]
    },
    "archreq": 0,
    "className": "QWindowsIntegrationPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("windows")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/platforms" ...
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/platforms/qwindows.dll"
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/platformthemes" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/platformthemes/qxdgdesktopportal.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/platformthemes/qxdgdesktopportal.dll, metadata=
{
    "IID": "org.qt-project.Qt.QPA.QPlatformThemeFactoryInterface.5.1",
    "MetaData": {
        "Keys": [
            "xdgdesktopportal",
            "flatpak",
            "snap"
        ]
    },
    "archreq": 0,
    "className": "QXdgDesktopPortalThemePlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("xdgdesktopportal", "flatpak", "snap")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/platformthemes" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/styles" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/styles/qwindowsvistastyle.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/styles/qwindowsvistastyle.dll, metadata=
{
    "IID": "org.qt-project.Qt.QStyleFactoryInterface",
    "MetaData": {
        "Keys": [
            "windowsvista"
        ]
    },
    "archreq": 0,
    "className": "QWindowsVistaStylePlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("windowsvista")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/styles" ...
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/styles/qwindowsvistastyle.dll"
DEBUG
WARNING
hello from showingdata
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/accessible" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/iconengines" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/iconengines/qsvgicon.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/iconengines/qsvgicon.dll, metadata=
{
    "IID": "org.qt-project.Qt.QIconEngineFactoryInterface",
    "MetaData": {
        "Keys": [
            "svg",
            "svgz",
            "svg.gz"
        ]
    },
    "archreq": 0,
    "className": "QSvgIconPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("svg", "svgz", "svg.gz")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/iconengines" ...
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/imageformats" ...
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qgif.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qgif.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "gif"
        ],
        "MimeTypes": [
            "image/gif"
        ]
    },
    "archreq": 0,
    "className": "QGifPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("gif")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qicns.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qicns.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "icns"
        ],
        "MimeTypes": [
            "image/x-icns"
        ]
    },
    "archreq": 0,
    "className": "QICNSPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("icns")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qico.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qico.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "ico",
            "cur"
        ],
        "MimeTypes": [
            "image/vnd.microsoft.icon",
            "image/vnd.microsoft.icon"
        ]
    },
    "archreq": 0,
    "className": "QICOPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("ico", "cur")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qjpeg.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qjpeg.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "jpg",
            "jpeg"
        ],
        "MimeTypes": [
            "image/jpeg",
            "image/jpeg"
        ]
    },
    "archreq": 0,
    "className": "QJpegPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("jpg", "jpeg")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qsvg.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qsvg.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "svg",
            "svgz"
        ],
        "MimeTypes": [
            "image/svg+xml",
            "image/svg+xml-compressed"
        ]
    },
    "archreq": 0,
    "className": "QSvgPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("svg", "svgz")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtga.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtga.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "tga"
        ],
        "MimeTypes": [
            "image/x-tga"
        ]
    },
    "archreq": 0,
    "className": "QTgaPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("tga")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtiff.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtiff.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "tiff",
            "tif"
        ],
        "MimeTypes": [
            "image/tiff",
            "image/tiff"
        ]
    },
    "archreq": 0,
    "className": "QTiffPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("tiff", "tif")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwbmp.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwbmp.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "wbmp"
        ],
        "MimeTypes": [
            "image/vnd.wap.wbmp"
        ]
    },
    "archreq": 0,
    "className": "QWbmpPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("wbmp")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwebp.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwebp.dll, metadata=
{
    "IID": "org.qt-project.Qt.QImageIOHandlerFactoryInterface",
    "MetaData": {
        "Keys": [
            "webp"
        ],
        "MimeTypes": [
            "image/webp"
        ]
    },
    "archreq": 0,
    "className": "QWebpPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("webp")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/imageformats" ...
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qgif.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qicns.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qico.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qjpeg.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qsvg.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtga.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qtiff.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwbmp.dll"
loaded library "D:/Qt/5.15.1/mingw81_32/plugins/imageformats/qwebp.dll"
QFactoryLoader::QFactoryLoader() checking directory path "D:/Qt/5.15.1/mingw81_32/plugins/accessiblebridge" ...
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/accessiblebridge" ...

jsulm

@MostafaEzzat I don't see it trying to load any SQL drivers. Do you have anything in plugins/sqldrivers directory of your Qt installation?

By the way: it should NOT search in qtbase/src/plugins/sqldrivers as that is source code directory, it should search in D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers

MostafaEzzat

@jsulm

i copied qsqlmysql4.dll into D:\Qt\5.15.1\mingw81_32\plugins\sqldrivers

and i got this

should i copy qtbase/src/plugins/sqldrivers into D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers files into

 

Got keys from plugin meta data ("QODBC3", "QODBC")
QFactoryLoader::QFactoryLoader() looking at "D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers/qsqlpsql.dll"
Found metadata in lib D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers/qsqlpsql.dll, metadata=
{
    "IID": "org.qt-project.Qt.QSqlDriverFactoryInterface",
    "MetaData": {
        "Keys": [
            "QPSQL7",
            "QPSQL"
        ]
    },
    "archreq": 0,
    "className": "QPSQLDriverPlugin",
    "debug": false,
    "version": 331520
}


Got keys from plugin meta data ("QPSQL7", "QPSQL")
QFactoryLoader::QFactoryLoader() checking directory path "C:/Users/Mostafa/Downloads/HospitalSoftware Last Version/build-Hospital-ClinicSoftware-Desktop_Qt_5_15_1_MinGW_32_bit-Debug/debug/sqldrivers" ...
("QSQLITE", "QMARIADB", "QMYSQL", "QMYSQL3", "QODBC", "QODBC3", "QPSQL", "QPSQL7")
Cannot load library D:\Qt\5.15.1\mingw81_32\plugins\sqldrivers\qsqlmysql.dll: Unknown error 0x000000c1.
QLibraryPrivate::loadPlugin failed on "D:/Qt/5.15.1/mingw81_32/plugins/sqldrivers/qsqlmysql.dll" : "Cannot load library D:\\Qt\\5.15.1\\mingw81_32\\plugins\\sqldrivers\\qsqlmysql.dll: Unknown error 0x000000c1."
QSqlDatabase: QMARIADB driver not loaded
QSqlDatabase: available drivers: QSQLITE QMARIADB QMYSQL QMYSQL3 QODBC QODBC3 QPSQL QPSQL7
Donnne
"Driver not loaded Driver not loaded"
not Connected
QSqlQuery::exec: database not open

jsulm

@MostafaEzzat said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

i copied qsqlmysql4.dll

From where?

MostafaEzzat

@jsulm

neither QMARIADB nor QMYSQL both don't load

and i copied it from qtbase/src/plugins/sqldrivers
the path where i used

D:\Qt\5.15.1\Src\qtbase\src\plugins\sqldrivers>qmake -- MYSQL_INCDIR="C:\Program Files (x86)\MariaDB 10.0\include\mysql" MYSQL_LIBDIR="C:\Program Files (x86)\MariaDB 10.0\lib"

jsulm

@MostafaEzzat It still looks like you DO not follow the documentation (https://doc.qt.io/qt-5/sql-driver.html#building-the-drivers): after building you need to do "make install", that will copy the DLLs to your Qt installation.
Also, are you sure you used the correct qmake to build the plug-ins? I'm asking because you used qmake without absolute path.

Christian Ehrlicher

@jsulm said in MySql Driver not loaded , Note: i tried all the existed forums problems and didn't work:

I'm asking because you used qmake without absolute path.

And because the plugin name is wrong - the '4' looks suspicious.