I guess the solution is simple. I'm trying to connect to a SQL Express Server on my computer using the following line:
pConnection->Open("Data Source=PETERPAN\SQLEXPRESS;Initial Catalog=Mydata;User Id = Test;Password = Test;False");//(connectionstring,userID,pwd,longoption);
Two questions: Do I have to put every part of the connection string in "quotes" or simply the entire string? What is the "longoption" I am prompted for?
The error I get right now is: "To few arguments in function call"
I'm glad for any help. Have a nice day!
Lumpi
You don't mention what language you are using, but I'm betting that last false is not a part of the connection string, but a second parameter to Open();
pConnection->Open("Data Source=PETERPAN\SQLEXPRESS;Initial Catalog=MyData", "Test", "Test", False);
check out the website connectionstrings. They'll give you a wide option of what to send to the database that you have. A copy-paste of these connectionstrings should work just fine. I think that the one closest to what you describe would be SQL Server 2008.
Related
I have added the following code in the WebApplet_Load of Service Request Applet.It's giving me the above error once, I tries to open the SR screen from the application.
try
{
var currBC = this.BusComp();
with (currBC)
{
ActivateField("Restrict_drop_down");
ClearToQuery();
//BC.SetViewMode(3);;
TheApplication.SetProfilAttr("SR Type", GetFieldValue("Restrict_drop_down"));
ExecuteQuery(ForwardBackward);
}
}
catch (e)
{
TheApplication().RaiseErrorText(e.errText);
}
Any idea on how to solve the issue?
You cannot do GetFieldValue when the BC is in Query mode. You have just done ClearToQuery, so you have to execute the query first, check for FirstRecord(); and then do a GetFieldValue();
Also, during the WebApplet load the first BC query is not finished running. It might not be the best place to write this code.
Please check with a siebel expert on your team, such kind of code needs to be placed carefully.
I am currently attempting to use transactions in my C++ app, but I have a problem with the ODBC's auto commit mode.
I am using the POCO libaries to create a connection to a PostgreSQL database on the same machine. Currently, I can send data to this database as single statements, but I cannot get my head around how to use Poco's transaction libraries to be able to send this data more quickly.
As I have several thousand records to insert, and so continuing to use single insert statements is extrememly slow and inpractical - So I am trying to use Poco's transaction to speed this up a bit (a fair bit).
The error I am encountering is a theoretically a simple one - Poco is throwing the following error:
'Invalid access: Session is in auto commit mode.'
I understand, as a result of this, I should somehow set "auto commit" to false - as it only allows me to commit data to the database line by line, rather than as a single transaction.
The problem is how I set this.
Currently, I have a session created from Session.h, that looks alot like this:
session = new Poco::Data::Session(
"ODBC",
connection_data.str()
);
Where connection data is a simple stringstream with the login information, password, database, server and "Driver={PostgreSQL ANSI};" to tell ODBC to utilize PostgreSQL's driver.
I have tried just setting a property "autocommit" to false through the session's setFeature or setProperty settings, this, of course, was to no avail. (it was more of a ditch attempt at this point).
session->setFeature("AUTOCOMMIT", false);
Looking around, I saw a possible alternative method by creating a ODBC sessionImpl directly from ODBC/session/SessionImpl.h instead of using this generic method above, and then creating a new session object from this.
The benefits of this are that ODBC's sessionImpl has references to autocommit mode in the header, which would suggest it would be able to handle this:
void autoCommit(const std::string&, bool val);
/// Sets autocommit property for the session.
However, having not used sessionImpl before, I cannot garuntee if this will work or if can can get this to work with the limited documentation available.
I am using C++ 03 (Not 11), with Visual Studio 2015
Poco 1.7.5
Boost (Where needed)
Would any one know the correct way of setting this feature (above) or a alternative method to achieving this?
edit: Looking at the source of poco, at:
https://github.com/pocoproject/poco/blob/develop/Data/ODBC/src/SessionImpl.cpp#L153
The property seems be named autoCommit, and looking at
https://github.com/pocoproject/poco/blob/develop/Data/include/Poco/Data/AbstractSessionImpl.h#L120
the case of the property names seem to matter. So, does it help if you use session->setFeature("autoCommit", false);?
Cant you just call session->begin(); and session->end(); on the corresponding Session object?
What is returned by session->canTransact()?
According to the doc begin() will start a new transaction, the doc does not mention any property that needs to be set before or after.
See: https://pocoproject.org/docs/Poco.Data.Session.html
Also faced a similar issue.
First of all before begin() need:
m_ses.setFeature("autoCommit", false);
m_ses.begin();
And the second issue is that this feature stays "autoCommit" in false for all other sessions. So don't forget for the next session call
session.setFeature("autoCommit", true);
I am new to the wsdl\soapmessage query\reply world( if i can put it in this way), and I am facing some difficulties using the following wsdl( which I really really hope, one will be so kind to look at at least one of the services described there)
http://almdemo.polarion.com/polarion/ws/services/TrackerWebService?wsdl
which was provided to me to develop a matlab webinterface. Right now my matlab code looks like this:
targetNamespace = 'http://ws.polarion.com/TrackerWebService';
method = 'queryWorkItems';
values= {'Query','Sort'}
names = {'query', 'sort'}
types ={'xsd:string','xsd:string'}
message = createSoapMessage( targetNamespace, method, values, names, types)
response = callSoapService('http://almdemo.polarion.com/polarion/ws/services',...
% Service's endpoint
'http://almdemo.polarion.com/polarion/#/workitems',...
% Server method to run
message)
% SOAP message created using createSoapMessage
author = parseSoapResponse(response)
Herewith to save you time I will just enonce my two problems:
Is the code correct?
Could someone tell me if such a wsdl link is just a definition of webservices or it is also a service's endpoint?
Normally to execute manually\per clicks this services on the weppage
http://almdemo.polarion.com/polarion, you have to login!
So how do I send a message in matlab which first log me in? Or must such a service be introduced into that wsdl for me to do it?? Could you be kind enough to write how it must be defined, because I don't really
write wsdl files, but I shall learn!**
I will be really thankful for your help and I wish you a happy week(-end) guys(& girls)!!!
Regards
Chrysmac
ps: I tried to use Soapui and gave that webpage as endpoint, but the toool crashes each time I enter my credentials! Maybe because of the dataload!??
It seems that c++ drivers doesn't accept mongodb connection uri format.
There's no documentation on how i should create connection string, any guess?
I need to connect to a replica set with 3 servers, and set readPreference options.
Create a connection to a replica set in MongoDB C++ client
Until the problems explained in #acm's answer are resolved, I have found a workaround to the bad Connection Strings of the C++ driver. You can create a DBClientReplicaSet using a vector of hosts and ports this way:
//First create a vector of hosts
//( you can ignore port numbers if yours are default)
vector<HostAndPort> hosts;
hosts.push_back(mongo::HostAndPort("YourHost1.com:portNumber1"));
hosts.push_back(mongo::HostAndPort("YourHost2.com:portNumber2"));
hosts.push_back(mongo::HostAndPort("YourHost3.com:portNumber3"));
//Then create a Replica Set DB Client:
mongo::DBClientReplicaSet connection("YourReplicaSetName",hosts,0);
//Connect to it now:
connection.connect();
//Authenticate to the database(s) if needed
std::string errmsg;
connection.auth("DB1Name","UserForDB1","pass1",errmsg);
connection.auth("DB2Name","UserForDB2","pass2",errmsg);
Now, you can use insert, update, etc. just as you did with DBClientConnection. For a quick fix, you can replace your references to DBClientConnection with DBClientBase (which is a parent to both DBClientConnection and DBClientReplicaSet)
Last pitfall: if you are using getLastError(), you must use it with the aimed database name like this:
connection.getLastError(std::string("DBName"));
cause otherwise it will always return "command failed: must log in" as described in this JIRA ticket.
Set the read preferences for every request
You have two ways to do that:
SlaveOK option
It lets your read queries be directed to secondary servers.
It takes place in the query options, which are at the end of the parameters of DBClientReplicaSet.query(). The options are listed in Mongo's official documentation
The one you would look for is mongo::QueryOption_SlaveOk, which will allow you to have reads made on secondary instances.
This is how you should call query();
connection.query("Database.Collection",
QUERY("_id" << id),
n,
m,
BSON("SomeField" << 1),
QueryOption_SlaveOk);
where n is the number of documents to return (0 if you don't want any limit), m the number to skip (defaults to 0), the next field is your projection and the last your query option.
To use several query option, you can use bitwise or | like this :
connection.query("Database.Collection",
QUERY("_id" << id),
n,
m,
BSON("SomeField" << 1),
QueryOption_SlaveOk | QueryOption_NoCursorTimeout | QueryOption_Exhaust);
Query::readPref option
The Query object has a readPref method which sets read preferences for a special query. It should be called for each query.
You can pass different arguments for more control. They are listed here.
So here's what you should do (I did not test that one cause I can't right now but it should work just fine)
/* you should pass an array for the tags. Not sure if this is required.
Anyway, let's create an empty array using the builder. */
BSONArrayBuilder bab;
/* if any, add your tags here */
connection.query("Database.Collection",
QUERY("_id" << id).readPref(ReadPreference_SecondaryPreferred, bab.arr()),
n,
m,
BSON("SomeField" << 1),
QueryOption_NoCursorTimeout | QueryOption_Exhaust);
Note: if any readPref option is used, it should override the slaveOk option.
Hope this helped.
Please see the connection string documentation for details on the connection string format.
(code links below are to 2.2.3 files)
To use a connection string with the C++ driver, you should use the ConnectionString class. You first call the ConnectionString::parse static method with a connection string to obtain a ConnectionString object. You then call ConnectionString::connect to obtain a DBClientBase object which you can then use to send queries.
As for read preference, at the moment I do not see a way to set the read preference in the connection string for the C++ driver, which would preclude a per-connection setting.
However, the implementation of DBClientBase returned by calling ConnectionString::parse with a string that identifies a replica set will return you an instance of DBClientReplicaSet. That class honors $readPreference in queries, so you can set your read preference on a per-query basis.
Since the current C++ drivers still do not accept the standard mongodb connection URIs, I've opened a ticket:
https://jira.mongodb.org/browse/CXX-2
Please vote for it to help get this fixed.
it seems like you can set read Preference before send a read request by call "readPref" method of your Query object. I'v not found a way to set read Preference on mongo collection object yet.
I try to select numeric(20,0) values from a Microsoft SQLServer database.
Therefore I connect to an Microsoft SQL Server over ODBC. I use the SQLServer Native Client 10.0 driver.
The way I connect and select data in my QT-project is the following:
db = QSqlDatabase::addDatabase("QODBC", "DBConnection");
db.open();
query.exec("SELECT * FROM TABLE")
while (query.next()) {
//Do something with query.value(0)
}
The problem now is when I look what kind of QVariant is returned from query.value() I see that it is a double. But double values are only good for about 16 digits and not for 20. For example in the select the value should be 10903012224000000001 but I get 10903012224000000000.
Is there any way to tell QT which type of value it should return?
An exact string value would suffice.
The way query.value(0).toXXX doesn´t work because it seems to start the transformation with the double value.
On topic:
i´m sure that the problem is in QT. When I use the same ODBC-Driver in a Java aplication I get the right values back.
Hi I found a bugreport https://bugreports.qt-project.org/browse/QTBUG-10451
The solution is to set numericalPrecisionPolicy from LowPrecisionDouble to HighPrecision
the following codeline is to add and then the qVariant is qString and everything works fine
db.setNumericalPrecisionPolicy(QSql::HighPrecision);