I'm working in a legacy app for the moment, upgrading Access 2003 to link to SQL Server tables (2008 R2 or later). With tables linked by code, I can insert, but not update or delete. I've tried everything on the web, no dice. Details below.
Being terse so not tl;dr.
Tables first created using upsizing wizard. In use, app has to connect to different ones in same schema, so can't just set and forget. Can't do local DSN's, many installs, though DSN file is possible. But problems there too, DSN not found. Details later.
Before the rest: Soon I'm further updating this app to Access 2016 or so. If this is different enough / easier there, I'll wait a few days. Maybe someone could suggest the best refsite for that.
* problem details follow *
Using a DSN and the UI to link a table, I get an editable table. Hurray.
But when I use the code below (found on every refsite), link is made but only selecting and inserting work. Everything else fails fails fails, no matter what.
Public Function LinkToSqlTable(sqlInstance As String, sqlDb As String,
sqlTableName As String, localTableName As String)
Dim linked As New TableDef
' ***factored-out functionality, known to work: reader can ignore*** '
DeleteTable localTableName
' connection-string steps, placeholders replaced by args '
Dim sCnx As String
sCnx = "ODBC;Driver=SQL Server;Server=_instance_;" & _
"Database=_db_;Integrated Security=SSPI"
sCnx = Replace(sCnx, "_instance_", sqlInstance)
sCnx = Replace(sCnx, "_db_", sqlDb)
' linked-table steps '
Set linked = CurrentDb.CreateTableDef(localTableName)
linked.Connect = sCnx
linked.SourceTableName = sqlTableName
CurrentDb.TableDefs.Append linked
' ui '
RefreshDatabaseWindow
End Function
* ID column or permissions? *
I thought the problem was lack of identity column originally, I added one, but no change. At least now I have a PK field like I should. ;-)
When I manually link table, UI demands to know the ID column. So could it still be it? Fine, but how do I set that in code? Searches revealed nothing.
I assume then it's permissions as sites etc. say. I also took all the steps I could think of to fix that. No dice.
* things I've tried *
Aside from the ID-column stuff I said before, these things (not in order):
Since DSN saved as a file, tried using it as exampled, in cnx string. Fail.
Used DSN contents, carefully winnowed & translated, in cnx string. Fail.
Used connection string from the table that I had connected manually with DSN. Fail.
Changed driver in cnx string across all major options, even omitted it. Fail.
Changed security in cnx to Integrated Security=SSPI and other options, and omitted entirely. Fail.
I added my actual local user as exampled, with and without password. Fail.
(Previous few options tried across earlier options, though not 100% coverage.)
In SQL Server, using SSMS, I tried security power:
Added SQS-authentication login to the instance
Matching user to the default db seen here
Gave that login-user read and write permissions in db here (plus others, sometimes)
Added matching id & pw to the cnx string. Fail.
I tried setting up this db in SQS to have let-everyone-do-everything "security" temporarily. Fail.
This, that, and the other thing. Everything fail!!
So a permissions issue? Some way to use DSN file after all? Mismatched permission settings in my cnx string? Boneheaded oversight? Something else that I've missed? I'm pretty good at both SQL Server and Access, but only at a basic level in their security stuff and connection strings are the devil.
* retrieved table properties *
Just in case they help, I retrieved these (after objects added to TableDefs collection).
** This one, done in UI and with DSN and this-is-ID-field, worked with editing: **
Name = dbo_tblSendTo
Updatable = False
DateCreated = 4/19/2016 11:11:40 AM
LastUpdated = 4/19/2016 11:11:42 AM
Connect = ODBC;Description=SQL Server tables for TeleSales 5;DRIVER=SQL Server Native Client 10.0;SERVER=(local)\sqlexpress;Trusted_Connection=Yes;APP=Microsoft Office 2003;WSID=CMSERVER;DATABASE=TS5_General;
Attributes = 536870912
SourceTableName = dbo.tblSendTo
RecordCount = -1
ValidationRule =
ValidationText =
ConflictTable =
ReplicaFilter =
** And this one, from table linked via code, didn't: **
Name = tblSendTo
Updatable = False
DateCreated = 4/19/2016 11:17:51 AM
LastUpdated = 4/19/2016 11:17:51 AM
Connect = ODBC;Description=SQL Server tables for TeleSales 5;DRIVER=SQL Server Native Client
> 10.0;SERVER=(local)\sqlexpress;Trusted_Connection=Yes;APP=Microsoft Office 2003;WSID=CMSERVER;DATABASE=TS5_General;
Attributes = 536870912
SourceTableName = dbo.tblSendTo
RecordCount = -1
ValidationRule =
ValidationText =
ConflictTable =
ReplicaFilter =
* my plea *
So..... Please someone help me out. I don't like feeling stupid like this, and regrettably I need to do this instead of replacing it with .NET code or similar.
Thanks, anyone who can...
Ed.
Alas, I am able to answer my own question.
edited a little since first posted in reply to HansUp's comments
I had added an identity column to the table that I couldn't edit. However, I had not set it up as a primary key. It turns out that using identity doesn't make something a primary key automatically.
But the latter, making it primary key using either of the 2 possible DDL syntaxes, is crucial. Since I thought I had dealt with the no edits without unique key problem, I focused on permissions.
All of the permissions things here, then, are just a sideshow.
The upshot of this is to be sure to add an identity column and make it a primary key if for some reason your original table schema didn't have that.
If I have the time, I will be trimming the question to reflect what I've discovered.
Related
In our web application, we observed the following:
GetUser/CreatMembershipEntities/ExplicitLoadFromAssembly seems quite expensive.
Also noticing that CreateEntityConnection is being called - EntityFramework?
I'm not entirely convinced that EF was configured correctly for this application. If it was, and was in use, I wouldn't expect to see new connections to be initiated for every call - yes/no?
Is a way to streamline this to avoid some major code refactoring?
The use of System.Web.Security.Membership.GetUser() seems like a biggie here. Instead of using the MembershipProvider to create users, what about just executing a sproc that does the same things.
I have found the following code that is ridiculous, as far as I am concerned - in causing a new call for each user until a unique one can be generated:
For i As Integer = 1 To Integer.MaxValue
'Generate unique username
If System.Web.Security.Membership.GetUser(userName & i) Is Nothing Then
'Increment value until no duplicate username found
userName = userName & i
Exit For
End If
Next
-- UPDATE--
I have modified the question slightly...
We were able to run up to 20 users then the IIS server would tank. Does the GetUser() method create a brand new connection every time? It looks like it, based on the results. How can I ensure that this GetUser() thing is actually using the db context, rather than spinning up its own connections?
I am trying to connect to an OpenOffice Base database from Java and execute a query, and have not been able to.
These are the steps I followed:
1) Created a Database 'TestDB.odb' in OpenOffice, and a table 'Movies' with columns (ID, Name, Director)
2) Downloaded hsqldb jar file and inclued in project build path
3) Used the following code to connect to it:
String file_name_prefix = "C:/Documents and Settings/327701/My Documents/TestDB.odb";
Connection con = null;
Class.forName("org.hsqldb.jdbcDriver");
con = DriverManager.getConnection("jdbc:hsqldb:file:" + file_name_prefix, "sa","");
Statement statement = con.createStatement();
String query1 = "SELECT * FROM \"Movies\"";
ResultSet rs = statement.executeQuery(query1);
Althoug I'm able to connect to the Database, it throws the following exception on trying to execute the query:
org.hsqldb.HsqlException: user lacks privilege or object not found: Movies
Tried googling, but have not been able to resolve my problem. I'm stuck and it would be great if someone could guide me on how to fix this issue?
You cannot connect to an .odb database. The database you have connected to is in fact a separeate set of files with names such as TestDB.odb.script, etc.
Check http://user.services.openoffice.org/en/forum/viewtopic.php?f=83&t=17567 on how to use an HSQLDB database externally from OOo in server mode. You can connect to such databases with the HSQLDB jar.
OLD thread.
I lost 2 days of my life until I changed the property:
spring.jpa.properties.hibernate.globally_quoted_identifiers = false
I was using mysql before and then I changed to hsqldb in order to run some tests. I kinda copied and pasted this property without looking and then you know - Murphy's law ...
I hope it helps.
I'm creating an in-house application and have always hardcoded the database connection string. However, this time I want to do something different and give the users the ability to enter the information from the application.
I figured out that I can store the variables in the Application Settings and call them from code, but I can't figure out how to call them within the connection string.
Here's the code:
Dim dbConn As New MySqlConnection
dbConn.ConnectionString = "Server=172.43.96.271;Port=3306;Uid=someone;
Password=theirpassword;Database=thedb"
Hope I explained myself well?
You can simply concatenate the string together, or better yet, use the String.Format method:
dbConn.ConnectionString = String.Format("Server={0};Port={1};Uid={2};Password={3};Database={4}", My.Settings.Server, My.Settings.Port, My.Settings.Uid, My.Settings.Database)
If you were using MS SQL, I'd recommend using the SqlConnectionStringBuilder class to do it, but since you're using MySql, it doesn't really apply. You may be able to use it anyway, though.
You would have to use User Settings for this.
And, if you want the users to input the separate parts of the connection string (Server, Post, Username, Password and DB), you would have to create a settings entry for each of those, and then construct the connection string from those values.
Here's a good article for this: User Settings Applied
I have about 85 SSIS packages that are using the same connection manager.
I understand that each package has its own connection manager.
I am trying to decide what would be the best configurations approach to simply set the connectionstring of the connection manager based on the server the packages are residing on.
I have visited all kinds of suggestions online, but cannot find anywhere the practice where I can simply copy the configuration from one package to the rest of the packages.
There are obviously many approaches such as XML file, SQL Server, Environment Variable, etc.
All the articles out there are pointing to use an Indirect method by using XML or SQL approach. Why would using an environment variable for just holding a connection string is such a bad approach?
Any suggestions are highly appreciated.
Thanks!
Why would using an environment variable for just holding a connection string is such a bad approach?
I find the environment variable or registry key configuration approach to be severely limited by the fact that it can only configure one item at a time. For a connection string, you'd need to define an environment variable for each catalog on a given server. Maybe it's only 2 or 3 and that's manageable. We had a good 30+ per database instance and we had multi-instanced machines so you can see how quickly this problem explodes into a maintenance nightmare. Contrast that with a table or xml based approach which can hold multiple configuration items for a given configuration key.
...best configurations approach to simply set the connectionstring of the connection manager based on the server the packages are residing on.
If you go this route, I'd propose creating a variable, ConnectionString and using it to configure the property. It's an extra step but again I find it's easier to debug a complex expression on a variable versus a complex expression on a property. With a variable, you can always pop a breakpoint on the package and look at the locals window to see the current value.
After creating a variable named ConnectionString, I right click on it, select Properties and set EvaluateAsExpression equal to True and the Expression property to something like "Data Source="+ #[System::MachineName] +"\\DEV2012;Initial Catalog=FOO;Provider=SQLNCLI11.1;Integrated Security=SSPI;"
When that is evaluated, it'd fill in the current machine's name (DEVSQLA) and I'd have a valid OLE DB connection string that connects to a named instance DEV2012.
Data Source=DEVSQLA\DEV2012;Initial Catalog=FOO;Provider=SQLNCLI11.1;Integrated Security=SSPI;
If you have more complex configuration needs than just the one variable, then I could see you using this to configure a connection manager to a sql table that holds the full repository of all the configuration keys and values.
...cannot find anywhere the practice where I can simply copy the configuration from one package to the rest of the packages
I'd go about modifying all 80something packages through a programmatic route. We received a passel of packages from a third party and they had not followed our procedures for configuration and logging. The code wasn't terribly hard and if you describe exactly the types of changes you'd make to solve your need, I'd be happy to toss some code onto this answer. It could be as simple as the following. After calling the function, it will modify a package by adding a sql server configuration on the SSISDB ole connection manager to a table called dbo.sysdtsconfig for a filter named Default.2008.Sales.
string currentPackage = #"C:\Src\Package1.dtsx"
public static void CleanUpPackages(string currentPackage)
{
p = new Package();
p.app.LoadPackage(currentPackage, null);
Configuration c = null;
// Apply configuration Default.2008.Sales
// ConfigurationString => "SSISDB";"[dbo].[sysdtsconfig]";"Default.2008.Sales"
// Name => MyConfiguration
c = p.Configurations.Add();
c.Name = "SalesConfiguration";
c.ConfigurationType = DTSConfigurationType.SqlServer;
c.ConfigurationString = #"""SSISDB"";""[dbo].[sysdtsconfig]"";""Default.2008.Sales""";
app.SaveToXml(sourcePackage, p, null);
}
Adding a variable in to the packages would not take much more code. Inside the cleanup proc, add code like this to add a new variable into your package that has an expression like the above.
string variableName = string.Empty;
bool readOnly = false;
string nameSpace = "User";
string variableValue = string.Empty;
string literalExpression = string.Empty;
variableName = "ConnectionString";
literalExpression = #"""Data Source=""+ #[System::MachineName] +""\\DEV2012;Initial Catalog=FOO;Provider=SQLNCLI11.1;Integrated Security=SSPI;""";
p.Variables.Add(variableName, readOnly, nameSpace, variableValue);
p.Variables[variableName].EvaluateAsExpression = true;
p.Variables[variableName].Expression = literalExpression;
Let me know if I missed anything or you'd like clarification on any points.
I just started working with an application that I inherited from someone else and I'm having some issues. The application is written in C# and runs in VS2010 against the 3.5 framework. I can't run the application on my machine to debug because it will not recognize the way they referenced their parameters when writing their DB queries.
For instance wherever they have a SQL or DB2 query it is written like this:
using (SqlCommand command = new SqlCommand(
"SELECT Field1 FROM Table1 WHERE FieldID=#FieldID", SQLconnection))
{
command.Parameters.AddWithValue("FieldID", 10000);
SqlDataReader reader = command.ExecuteReader();
...
If you will notice the "parameters.AddWithValue("FieldID", 10000);" statement does not include the "#" symbol from the original command text. When I run it on my machine I get an error message stating that the parameter "FieldID" could not be found.
I change this line:
command.Parameters.AddWithValue("FieldID", 10000);
To this:
command.Parameters.AddWithValue("#FieldID", 10000);
And all is well... until it hits the next SQL call and bombs out with the same error. Obviously this must be a setting within visual studio, but I can't find anything about it on the internet. Half the examples for SQL parameter addition are written including the "#" and the other half do not include it. Most likely I just don't know what to search for.
Last choice is to change every query over to use the "#" at the front of the parameter name, but this is the transportation and operations application used to manage the corporation's shipments and literally has thousands of parameters. Hard to explain the ROI on your project when the answer to the director's question "How's progress?" happens to be "I've been hard at it for a week and I've almost started."
Has anyone run into this problem, or do you know how to turn this setting off so it can resolve the parameter names without the "#"?
Success! System.Data is automatically imported whenever you create a .NET solution. I removed this reference and added it back to make sure that I had the latest version of this library and that fixed the issue. I must have had an old version of this library that was originally pulled in... only thing I can figure.
Its handled by the .NET Framework data providers not Visual Studio.
It depends on the data source. Look here:Working with Parameter Placeholders
You can try working with System.Data.Odbc provider and using the question mark (?) place holder. In thios case dont forget to add the parameters in the same order they are in the query.