从 sqlplus 连接到 Oracle 19C 云

Question

I am not able to connect to my Oracle 19C Cloud DB, I have downloaded the wallet and placed it in a secured place in my machine(windows). I have installed Oracle 19C Client in my machine, and updated tnsnames.ora(network/admin) with connection strings from wallet zip, Not sure how whether I have missed any config like Environment variables Getting below error from sqlplus ERROR: ORA-12154: TNS:could not resolve the connect identifier specified

Note: I am able to connect to Cloud from Sql developer using the wallet file. And I have Oracle 18c XE running in my machine.

Any help will be appreciated, thanks in advance.

Answer 1

Your problem seems to be related with the issue that you have an Oracle XE database version installed in your own laptop.

When you run sqlplus or any other OCI tool to connect to Oracle, no matter whether the database is a remote host or in the cloud, sqlplus evaluates the TNS_ADMIN environment variable to identify where your sqlnet and tnsnames files are located. If there is no variable, it uses the default values of your main Oracle registry entries, that for sure point to your XE version, as it was installed before.

When you get ORA-12154: TNS:could not resolve the connect identifier specified , your session is not finding any information regarding the target in your configuration files, probably because the session is evaluating the files in your XE installation

Try to do the following

• Copy the wallet files provided by your Oracle Cloud to a location different to your XE installation.
• Export the TNS_ADMIN variable in your sqlplus cmd session to this new path
• Run sqlplus using wallet

Example ( I believe you did points 1 and 2 )

1. Install Oracle Client software on your computer. Use either the full Oracle Database Client 11.2.0.4 (or higher) or the Oracle Instant Client 12.1.0.2 (or higher). The Instant Client contains the minimal software needed to make an Oracle Call Interface connection. The Instant Client 12.1.0.2 (or higher) is sufficient for most applications.
2. Download client credentials and store the file in a secure folder on your client computer. See Download Client Credentials (Wallets).
3. Unzip/uncompress the credentials file into a secure folder on your client computer.
4. Edit the sqlnet.ora file in the folder where you unzip the credentials file, replacing "?/network/admin" with the name of the folder containing the client credentials .

Example

WALLET_LOCATION = (SOURCE = (METHOD = file) (METHOD_DATA = (DIRECTORY="/my_new_path")))
SSL_SERVER_DN_MATCH=yes

cmd> set tns_admin = my_new_path
cmd> sqlplus /@yourtnsentry 

I don't know whether your cloud database is using a Public IP address or not, or if you want to use SSH tunneling to connect to the database. Take a look here, because then you might want to use SQLcl ( Sql Developer Command Line )

https://docs.cloud.oracle.com/en-us/iaas/Content/Database/Tasks/connectingDB.htm