Connect Oracle Database From Delphi - Could Not Resolve Connect Identifier Specified
Oct 6, 2010
I have the following computer/setup:
Acer laptop, Intel Processor w/ Windows 7 Professional (64-bit)
Delphi 2010 Professional
Oracle XE (+ the Oracle XE client that comes with it)
I cannot can't to the Oracle database from Delphi. The error I keep getting is:
Alias is not currently opened. [Oracle][ODBC][Ora]ORA-12154:TNS: could not resolve the connet identifier specified.
Here's what I've done:
1. Create an ODBC connection to my Oracle database
- run C:WindowsSysWOW64odbcad32.exe to open the ODBC administrator.
- Data source name: bt_user
- TNS Server Name: localhost/xe
- user bt_user
- Clicked "test connection" -- Success.
2. Open Delphi and drop a TDatabase component on my main form.
- Set the Alias Name property to "bt_user" (the alias I set up in ODBC)
- Set database name to "bt_user".
- Checked "connected".
Alternatively, I tried using the Delphi ADO components (the dbGo components).
- Drop TADOConnection component on my form.
- Select "connection string" and open the dialog.
- Click "build string".
- Select "Microsoft OLE DB Provider for ODBC Drivers" from the selection.
- In "use data source", select "bt_user" from the drop-down list (my ODBC connection from #1)
- Click "test connection".
Again the same error.
My questions are:
1. Can Delphi work with Oracle XE (Express Edition)?
2. If so, then do I need to install the "Instant Client"?
3. Will the instant client for Oracle 10g work with Oracle 10g XE?
4. Do I need to install any additional ODBC driver(s)?
5. Why was I successful in creating the ODBC connection in Windows, but it failed in Delphi?
6. Will Visual Studio.NET (C#) work with Oracle XE, and what are the steps for setting that up?
i tried for 3 days to setup a connection between my oracle database 11.2 (resides on 2003,64 bit Microsoft windows) and a mysql database (resides on 2003,32 bit Microsoft widows).
i used dg4odbc 64 bit which was installed on oracle server, my steps was as follows :
1- configure ODBC driver (MYSQL 3.51 odbc) on oracle server that connect to mysql database and the connection was tested successfully (the name of odbc dsn is DG4ODBC).
2- configure the listener.ora file (which resides on dg4odbc installation path) that contains the following :
4- configure that initdg4odbc.ora file that resides on the dg4odbc installation.
HS_FDS_CONNECT_INFO = DG4ODBC HS_FDS_TRACE_LEVEL = off
5- restart the gateway listener.
6- test DG4ODBC service by tnsping which was successful .when i try to get some data from mysql database by SELECT * FROM MDL_COURSE@DG4ODBC query,the query take some time (15 second !!) and return
ORA-12154: TNS:could not resolve the connect identifier specified
I have installed Oracle 10g client and am trying to connect to an Oracle 9i database with it. I have already created the required Listner and service names. But when I try to login to SQL * Plus , it gives me the following error: Ora-12154: TNS: Could not resolve the connect identifier specified
Could Oracle 10g client connect to a 9i database? If so how do I fix this problem?
I am trying to create a DR on the same server as that of primary server.
Specifictaions: Primary server:test DR: testdr
I have made thetns entries and i am also able to tnsping both test and testdr. But below is the error that is being constantly getting logged in the alert of primary server.
Error 12154 received logging on to the standby Fri Dec 14 20:09:36 2012 Errors in file /11g/oradata/admin/ettest/bdump/ettest_arc0_7336.trc: ORA-12154: TNS:could not resolve the connect identifier specified PING[ARC0]: Heartbeat failed to connect to standby 'ettestdr'. Error is 12154.
I have a really strange problem connecting from a new client to an Oracle server, here are the points :
- There is no problem with DB server and its listener and all that as I am able to connect from other clients - I have installed the oraclient on this machine ( it is a XP machine ) and copy/pasted the TNSNAMES.ORA from one of those correct PCs here and when I do a TNSPING is returns OK - even when I open oracle net manager I see the TNS entries in there and when I test a connection thru it is says successfull - BUT WHEN I USE SQL+ or TOAD or ODBC ( any of these) trying to make a connection using the exact same TNS entries it returns :
"ORA-12154: TNS:could not resolve the connect identifier specified"
- I have tried with both IP and Host name but no luck - TNSNames.Ora and sqlnet.ora both are located here : oracleproduct10.2.0client_1NETWORKADMIN - there is just one oracle home - I have already uninstalled/installed oracle client - These lines are included in Sqlnet.ora : SQLNET.AUTHENTICATION_SERVICES= (NTS) NAMES.DIRECTORY_PATH= (TNSNAMES)
I marked those entries in Sqlnet.ora and that made no diff in result, another thing : if I use easy connect method : sqlplus scott/tiger@<Servername>:1521/ORCL it does connect but using TNSNames still I can not get connected. so strange!!, seems somehow the TNS file even is not being picked or looked at !
I have both 10g and 11g installed in my machine.There are so many CI builds that runs without problems.For few builds which uses 10g, it throws errors as ,
SQL*Plus: Release 11.2.0.1.0 Production on Thu Dec 27 01:18:52 2012 Copyright (c) 1982, 2010, Oracle. All rights reserved. ERROR: ORA-12154: TNS:could not resolve the connect identifier specified Enter user-name:
Only at a particular step, this is happening. After this,if some-other target is connecting to Oracle,it is able to connect.
While connecting to Database through sqlplus as sysdba, error pop-up.
SQL> conn sysdba@disdevt Enter password: ******* ERROR: ORA-12154: TNS:could not resolve the connect identifier specified Warning: You are no longer connected to ORACLE. SQL>
but i am able to log-in to database through pl/sql developer. Since TNS is same for both.
I have oracle 10g and Developer suite installed locally in my system and I have edited my TNSNAMES.ora file and added a entry for VISLINUX(for both Developer suite and oracle DB TNSNAMES.ora files).
When I use TNSPING comand I get an error for the schemas APPDEV and VISLINUX.
D:Documents and SettingsBAR>tnsping appdev
TNS Ping Utility for 32-bit Windows: Version 10.1.0.4.2 - Production on 25-DEC-2 008 20:22:57
Copyright (c) 1997, 2003, Oracle. All rights reserved.
Used parameter files: C:DevSuiteHome_1 etworkadminsqlnet.ora
What works: There is a oracle database on the local network. I'm connecting to it through my web server on my pc (apache/php). I have installed "oracle_instantclient10". It works fine - i can connect to oracle db, queries are executed fine.
What doesnt work: I'm trieing to connect to the same oracle db from a Linux server, but i get the error:
ORA-12154: TNS:could not resolve the connect identifier specified
My linux server can connect to remote oracle db, because "nmap ORACLE_DB_MACHINE_IP -PN", gives me answer "1521/tcp open oracle". I have the same firewall allowance with my winXp pc.
I use the same "TNSNAMES.ORA" and "SQLNET.ORA" files on both: linux server, winXp pc. The only difference between winXp and linux machines is that winXp uses oracle instant client version 10.2, and linux uses version 11.2.
I'm not able to login to PL/SQL Developer 7.0.3.1123.I'm receiving "ORA-12154: TNS: could not resolve the connect identifier specified" error. Although it lists all TNS entries in Database drop down.It was working fine last week but now I'm not able to login.
we have oracle Oracle Database 10g Enterprise Edition Release 10.1.0.2.0 - 64bi PL/SQL Release 10.1.0.2.0 - Production CORE 10.1.0.2.0 Production TNS for IBM/AIX RISC System/6000: Version 10.1.0.2.0 - Productio NLSRTL Version 10.1.0.2.0 - Production
and SQL Server 2005 on MS windows Server 2003
i followed the article and i get succeed on each steps
[URL]
when i execute the select statement under user by name NEW I got below error
ORA-02019: connection description for remote database not found
it seems to me that the file tnsnames.ora is not read when i execute sqlplus.whit the command: sqlplus username / password @ servicename i receive the error ORA-12154, while if i pass the whole connection string i can connect without problems
I am trying to develop a web application with C # VS.net, my application is to connect to an Oracle database on a server (LAN), the problem I want to connect to the database without install oracle or ODP on my client machine.
When I created the database the connection I used was s7s but whether or not I include that name or just use the ID/password that script will not connect.
I am attempting to connect to an Oracle 8i database via the Oracle 9.02 ODBC driver and I am receiving the following error message upon testing the connection in WinXp's ODBC Data Source Administrator dialog box: "Unable to connect SQLState=IM004 [[Microsoft]][[ODBC Driver Manager]] Driver's SQLAllocHandle on SQL_HANDLE_ENV failed" .
I am running Oracle Client 9.2 on a P4 machine running winXP.
I am able to connect to DATABASE from SQLAssistant only when I provide string like ABOVE........If I dont mention the SERVICE, m unable to connect to DB.Now the biggest issue is with SQL Developer.....m not at all able to connect to DB using SQL Developer.
I have created two database one for production and another one for test.I created both database in shared_server mode(by using dbca),after than I did not change anything.My problem is when i connect to test database from outside lan through static ip its working well,but when i connect to production database which is not connected. I checked and compared two databases,then I find there are some changes in dispatcher and mts_ dispatcher parameters.And I used this query to check the shared_server status,
ie.select * from v$shared_server,
the output of this query is attached with this post.
Need to know how to connect to Oracle (11g) database from Log4net.config file. As I need to wright the logs to the Oracle (11g) database when any user logon to the web application.
Note: I am succesfully able to wright the logs to the text files but not able to wright the logs to the Oracle (11g) database.
In fact I have around 50 excelbooks that are connect with oracle via ODBC/or any other way. My task is to build the login screen on form 10g. This form will validate the user via .dll after successfully validation, Form will connect to specific oracle user. This Login Screen will call the new form that will execute the query for the list of excel sheet [table that will keep the name, description and path of the excelbook]. User will select the one excelbook to open. As user will select Excelbook should be open. Now this excel book should be connected with specific oracle user.
Question 1: How to open the excelbook, that excelbook should be connected via form 10g login screen. After connection excel has its own micros to run he query from oracle database.
Question 2: How I can create the mirco into form 10g to run into excelbook/excelsheet.
Question 3: How I can pass the query or function/procedure to the excelbook/excelsheet.
all of the client cann't connect the db,and using sqlplus / as sysdba also cann't login there are many error of TNS-12535 and in the listener.log
alert.log: Sun Apr 29 18:10:36 2012 opidcl aborting process unknown ospid (42992060) as a result of ORA-604 Sun Apr 29 18:10:54 2012 opidcl aborting process unknown ospid (26280196) as a result of ORA-604
I am developing an 64bit And-In software. My OS is windows7 64bit Ultimate. Developer tool is Microsoft Visual Studio 2010 Ultimate 64bit any-CUP.Server is SUN server and Oracle database 10.2.0.5 64bit enterprise edition.I have installed instantclient-odbc-win64-10.2.0.5 on my computer.I am able to connect through the command line sqlplus user/pass@server.In date source(c:windowssystem32odbcad32.exe), ODBC Driver connection successful.But in VS2010 C#, use Tools -> Connect Database,I get an error 193 (Oracle in instantclient10_2,c:ora10_64SQORA32.dll) cann't be loaded.SQORA32.dll is 32bit ODBC Driver or 64bit ODBC Driver?How can I connect database with vs2010 64bit?
I have new virtual UNIX machine and I installed oracle client on /usr/lib/oracle. Also I have a oracle database and I am able to connect to this database from my desktop sql developer.
So now I am trying to connect from new UNIX machine. Where I created tnsnames.ora file under /usr/lib/oracle/network/admin and before connecting did export the following
ORA-12545: Connect failed because target host or object does not exist. Not sure what I missed here. using same tns file I am able to connect from sql developer on windows.
