I'm trying to connect my c++ code with oracle using SQLAPI++ but it gives me the error
TNS:could not resolve the connect identifier specified
My code is like so:
con.Connect( "(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp) (HOST=192.168.1.XXX) (PORT=1521))(CONNECT_DATA = (SERVICE_NAME = SERVICE_NAME )))", "UsrName", "Password", SA_Oracle_Client );
if I only use the same code but the username and password are equal to nothing like this:
con.Connect( "(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp) (HOST=192.168.1.XXX) (PORT=1521))(CONNECT_DATA = (SERVICE_NAME = SERVICE_NAME )))", "", "", SA_Oracle_Client );
the compiler gives me an ORA-01017: Invalid username / password; connection refused\n error.
You may give instant client syntax a try:
[//]host[:port][/service name]
This I've used with SQLAPI++ successfully.
The string you've used is expected to occur in tnsnames.ora and you refer to this entry via a so called tnsname. If you can't change the tnsnames.ora stored in Oracle installation you're using then you can instruct the Oracle API to pick the file up form another location by defining the environmanet varable TNS_ADMIN. Set this to a directory were your own tnsnames.ora file exists.
Related
I am trying to connect to Cloud SQL by using Python SDK io.jdbc module, more specifically ReadFromJdbc class, which is documented here- https://beam.apache.org/releases/pydoc/current/apache_beam.io.jdbc.html
Based on it and info on connecting to Cloud MySQL using JDBC here- https://github.com/GoogleCloudPlatform/cloud-sql-jdbc-socket-factory/blob/main/docs/jdbc-mysql.md I wrote the following code
import apache_beam as beam
import apache_beam.io.jdbc as jdbc
import typing
import apache_beam.coders as coders
from apache_beam.options.pipeline_options import PipelineOptions
pipeline_options = {
'project': 'project-name',
'runner': 'DataflowRunner',
'region': 'europe-central2',
'staging_location':"gs://temp",
'temp_location':"gs://temp",
'template_location':"gs://templates/temp_name"
}
pipeline_options = PipelineOptions.from_dictionary(pipeline_options)
serviceAccount = r'path\to\serviceaccount.json'
os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = serviceAccount
ExampleRow = typing.NamedTuple('ExampleRow',
[('id', int), ('migration', str)])
coders.registry.register_coder(ExampleRow, coders.RowCoder)
with beam.Pipeline(options=pipeline_options) as p:
res = (
p
| "Read database list" >> jdbc.ReadFromJdbc(
table_name='table',
driver_class_name='com.mysql.jdbc.Driver',
jdbc_url='jdbc:mysql:///<DATABASE_NAME>?cloudSqlInstance=<INSTANCE_CONNECTION_NAME>&socketFactory=com.google.cloud.sql.mysql.SocketFactory&user=<MYSQL_USER_NAME>&password=<MYSQL_USER_PASSWORD>',
username='user',
password='pass',
query = "select id, migration from db.table;",
fetch_size=1,
classpath=["com.google.cloud.sql:mysql-socket-factory-connector-j-8:1.7.2"],
expansion_service = 'host:6666'
)
| "Print results" >> beam.io.WriteToText(r'gs://output/out.csv')
)
For the expansion service I have set up WLS2 python environment as documented here- https://beam.apache.org/documentation/sdks/java-multi-language-pipelines/#advanced-start-an-expansion-service
Unfortunately, I get this error:
grpc._channel._InactiveRpcError: <_InactiveRpcError of RPC that terminated with:
status = StatusCode.UNAVAILABLE
details = "failed to connect to all addresses; last error: UNAVAILABLE: ipv4:127.0.0.1:6666: WSA Error"
debug_error_string = "UNKNOWN:failed to connect to all addresses; last error: UNAVAILABLE: ipv4:127.0.0.1:6666: WSA Error {grpc_status:14, created_time:"2022-12-08T15:43:05.445755053+00:00"}"
I tried to switch expansion_service to a specific IP that I got from wls hostname -I but it produced the same result, even though you can reach it (tested with ping and hosted a webserver).
Am I doing something completely wrong? I find it hard to believe that it's so hard to connect to Cloud SQL, so I must be...
Transforms under apache_beam.io.jdbc module are cross-language transforms implemented in the Beam Java SDK. Hence, during the pipeline construction, Python SDK will connect to a Java expansion service to expand these transforms. You followed the instructions to create a Python expansion service.
I think the easiest thing to do will be to use the default expansion service.
First, install Java runtime in the computer from where the pipeline is constructed and make sure that java command is available.
Use the following transform to read from Cloud SQL,
p | "Read database list" >> jdbc.ReadFromJdbc(
table_name='table',
driver_class_name='com.mysql.jdbc.Driver',
jdbc_url='jdbc:mysql:///<DATABASE_NAME>?cloudSqlInstance=<INSTANCE_CONNECTION_NAME>&socketFactory=com.google.cloud.sql.mysql.SocketFactory&user=<MYSQL_USER_NAME>&password=<MYSQL_USER_PASSWORD>',
username='user',
password='pass',
query = "select id, migration from db.table;",
fetch_size=1,
classpath=["com.google.cloud.sql:mysql-socket-factory-connector-j-8:1.7.2"]
)
I am attempting to use pymssql to connect to a client's database, but have thus far been unable to succeed. I believe that the root of the problem is this entry in the stack trace of my TDSDUMP:
dblib.c:761:dbsetlname(0x1ac3e10, <username>#<servername>.database.windows.net, 2)
dblib.c:7929:dbperror((nil), 20042, 0)
dblib.c:7981:20042: "Name too long for LOGINREC field"
One problem is that <servername>.database.windows.net already exceeds the string limit (which seems to be 30 according to this: How to use PHP's dblib PDO driver with long usernames? / SQLSTATE[HY000] Name too long for LOGINREC field (severity 2)).
I have also attempted to exclude the #<servername>.database.windows.net portion in the username entry only to receive the following error:
msgno 40532: "Cannot open server "1433D" requested by the login. The login failed."
According to https://github.com/pymssql/pymssql/issues/330 the #<servername> portion is requested by the server.
So at this point, I attempted to do the following:
user = username + "#{}".format(server)
user = user[:30]
And I received the following information (which was a slight improvement but still not ideal, given that I could still not establish the connection):
"Cannot open server "<server_name minus the last 6 characters>" requested by the login. The login failed."
If possible, I would prefer passing some parameter to pymssql's connect method that would override this character limit or do something to append the server to the username on the backend after calling dbsetlname on just <username> without the #<servername> portion. Does anyone have any recommendations (again the preference is to not ask the client to change our username, but we may have to resort to that or trying to use pyodbc if there's no other option).
These are a few of the connection methods I have tried:
conn = pymssql.connect(
host=host,
database=database,
user=username,
password=password,
port=int(port) # this is 1433
)
conn = pymssql.connect(
host=host,
database=database,
user=username + '#{}'.format(servername),
password=password,
port=int(port) # this is 1433
)
conn = pymssql.connect(
server=<servername>.database.windows.net,
database=database,
user=username,
password=password,
port=int(port) # this is 1433
)
Thanks in advance for any help/advice that you may be able to offer!
You can probably use an alternate connecting string method.
If you're using SQL Server Auth, try this:
conn = pymssql.connect(
server="<servername>.database.windows.net",
port=1433,
user="username",
password="password",
database="dbname"
)
If you're using Windows Auth:
conn = pymssql.connect(
server="<servername>.database.windows.net",
port=1433,
user="DOMAIN\USERNAME",
password="password",
database="dbname"
)
Have you tried either of these connect methods?
Im trying to use msi library to read some specifc informations in the database of msi file by using the function openDatabase
My code is:
db = msilib.OpenDatabase(msiFile, MSIDBOPEN_READONLY)
view = db.OpenView("SELECT Key, Name, Value FROM Registry")
while True:
view.Execute(None)
record = view.Fetch()
But I got an error:
NameError: global name 'MSIDBOPEN_READONLY' is not defined
Currently when I want to connect to a node I simply do: ssh username#node and everything works fine. (thanks Kerberos :-))
Now I'm trying to develop a simple python script that connect to a specified host but I cannot connect to it using that script.The following my script:
import paramiko
import gssapi
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(hostname = 'node_name', username = 'my_uname', gss_auth = True, gss_kex = True)
But I received this error:
paramiko.ssh_exception.AuthenticationException: Authentication failed.
I tried also
ssh.connect(hostname = 'node_name', username = 'my_uname', gss_auth = True, gss_kex = True, gss_deleg_creds=True)
and the error I received changed a bit:
gssapi.error.GSSException: (131072) An invalid name was supplied. Minor code: (100001) Success. Target: node_name
Any suggestions?
Thanks!
I'm fairly new to Oracle. I'm trying to connect to a remote Oracle database using OCCI. All the examples i've found up this point have been for connecting to a local database. Could someone please point me in the right direction and let me know where i can find an example connection to get me past this point? Thanks, Mike
createConnection( "name", "passwrd", "string")
"string" stands either for the connection name that is resolved with the Oracle "tnsnames.ora" file which should be located in your ORACLE_HOME(Oracle install dir)\NETWORK\ADMIN directory or for a connection string like below
Code:
connection_name =
(DESCRIPTION =
(ADDRESS=(PROTOCOL = TCP)(HOST = ip_address)(PORT = listener_port))
(CONNECT_DATA= (SERVICE_NAME = listener_service_name)
(SERVER = DEDICATED))
)