Trying to connect MySQL and Oracle in RedHat

Question

Hi all,
i´m tryng to create a dblink between Oracle 10.2.0 and MySQL,
when when i try using sqlplus i obtain this error:
SQL> SELECT "id" FROM issues@mysqldb;
ORA-28500: la conexion de ORACLE a un sistema no Oracle ha devuelto este mensaje:
[Generic Connectivity Using ODBC]DRV_InitTdp: DB_ODBC_INTERFACE (2082): ; [MySQL][ODBC 5.1 Driver]Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2) (SQL State: 08S01; SQL Code: 2002)
ORA-02063: 2 lines precediendo a MYSQLDB
This is my configuration:
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/hs/admin/initmysqldb.ora
# This is a sample agent init file that contains the HS parameters that are
# needed for an ODBC Agent.
# HS init parameters
HS_FDS_CONNECT_INFO = hsqldb
HS_FDS_TRACE_LEVEL = DEBUG
HS_FDS_TRACE_FILE_NAME = mysqldb.trc
HS_OPEN_CURSORS=300
HS_AUTOREGISTER = TRUE
HS_FDS_SHAREABLE_NAME=/usr/lib/libmyodbc5.so
set ODBCINI=/usr/local/etc/odbc.ini
# Environment variables required for the non-Oracle system
#set <envvar>=<value>
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/network/admin/listener.ora
# listener.ora Network Configuration File:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = /usr/lib/oracle/xe/app/oracle/product/10.2.0/server)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = /usr/lib/oracle/xe/app/oracle/product/10.2.0/server)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = mysqldb)
(ORACLE_HOME = /usr/lib/oracle/xe/app/oracle/product/10.2.0/server)
(PROGRAM = hsodbc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = descordel01)(PORT = 1521))
DEFAULT_SERVICE_LISTENER = (XE)
/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/network/admin/tnsnames.ora
# tnsnames.ora Network Configuration File:
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = descordel01)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
mysqldb =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = descordel01)(PORT = 1521))
(CONNECT_DATA =
(SERVICE_NAME = mysqldb)
(HS = OK)
)

Answer 1

Hi,
You don't say if your Redhat Linux is 32-bit or 64-bit because 10.2 HSODBC was never ported to Linux 64-bit.
Also, 10.2 HSODBC is now desupported and has been replaced by the 11g Database Gateway for ODBC (Dg4ODBC) so you should install and use that so you are on a fully supported version. The following notes in My Oracle Support have further information -
Note.466228.1 How to Setup DG4ODBC on Linux x86 32bit
Note.561033.1 How to Setup DG4ODBC on 64bit Unix OS (Linux, Solaris, AIX, HP-UX)
Note.1083703.1 Master Note for Oracle Gateway Products
If you are Linux 32-bit and want to continue with the HSODBC setup then please review this note -
Note.264567.1 How To Setup HSODBC on Linux
and make sure you have the setup correct.
For example, in the listener.ora entry you should have an entry for the ENV variable LD_LIBRARY_PATH to make sure the process spawned by the listener picks up the correct libraries -
(ENVS=LD_LIBRARY_PATH=/usr/lib/oracle/xe/app/oracle/product/10.2.0/server/lib:<path to odbc_driver_directory>/lib)
such as -
(SID_DESC =
(SID_NAME = hsodbc)
(ORACLE_HOME = /home/oracle/server/10.2.0/)
(PROGRAM = hsodbc)
(ENVS=LD_LIBRARY_PATH=/home/oracle/server/10.2.0/lib:/home/odbc/dd/lib)
You need to stop and start the listener after making any changes.
If you still have problems then send the -
- odbc.ini
- odbcinst.ini - if being used
- full name and version of the ODBC driver being used
- full version of MySQL being accessed
- modified listener.ora
Regards,
Mike