I'm writing a CLR stored procedure to take XML data in the form of a string, then use the data to execute certain commands etc.
The problem that I'm running into is that whenever I try to send XML that is longer than 4000 characters, I get an error, as the XmlDocument object can't load the XML as a lot of the closing tags are missing, due to the text being truncated after 4000 chars.
I think this problem boils down to the CLR stored procedure mapping the string parameter onto nvarchar(4000), when I'm thinking something like nvarchar(max) or ntext would be what I need.
Unfortunately, I can't find a mapping from a .NET type onto ntext, and the string type automatically goes to nvarchar(max).
Does anyone know of a solution to my problem?
Thanks for any help
I think you want the System.Data.SqlTypes.SqlXml type.
For example:
using System;
using System.Data;
using System.Data.SqlClient;
using System.Data.SqlTypes;
using System.Xml;
using Microsoft.SqlServer.Server;
public partial class StoredProcedures
{
[SqlProcedure]
public static void StoredProcedure1(SqlXml data)
{
using (XmlReader reader = data.CreateReader())
{
reader.MoveToContent();
// Do stuff here.
}
}
};
For CLR stored procedures, char, varchar, text, ntext, image, cursor,
user-define table types and table cannot be specified as parameters.
You should be able the nvarchar(max) type instead of the ntext type.
ntext will disappear in future versions of SQL Server so you should use nvarchar(MAX) instead.
Related
I have requirement like to call the stored procedures to get the data, here i will get the stored procedure name through post data.
I tried using GString but no use, Can any one help me to solve this issue.
Thanks in advance.
This is a weird one, but possible. Grails/GORM doesn't provide a way to execute stored procedures. It's just not part of ORM functionality. And neither does Hibernate. But, Hibernate does provide access to a JDBC connection. So you can get a connection from Hibernate, then create a Groovy Sql instance with the connection, and finally execute your stored procedure. Here's an example:
import groovy.sql.Sql
SomeDomainClass.withNewSession { session ->
session.doWork { java.sql.Connection connection ->
def sql = new Sql(connection)
sql.call("YOUR STORED PROCEDURE SQL HERE")
}
}
It works like this:
Using any of your domain classes, call withSession(Closure) to get a Hibernate session.
With the session, call doWork(Work) to get access to the session's JDBC connection. Now, doWork(Work) expects an implementation of org.hibernate.jdbc.Work. But, if I recall correctly, Groovy can take a closure with the same parameters and coerce it to implement the interface.
Using the connection, create an instance of Sql. You could skip this and query with Java, but Groovy's Sql class is so nice.
Use one of the available Sql.call() methods to execute your stored procedure.
In postgress SQL, it is posible to call stored procedure. The catch is returning a data table so that you can map it to a model. This is as shown bellow.
create function activate(confirmationcode text)
returns TABLE(resultid integer, resultmessage character varying)
language plpgsql
as $$
BEGIN
....
END
This can be invoked as follows in GORM db connections
type FuncResult struct {
Resultid int
Resultmessage string
}
...
fResult := FuncResult{}
err := s.db.Raw("SELECT * from activate(?)", token).Scan(&fResult).Error
I am new to dropwizard. I am going through different tutorial but I couldnt find good example/tutorial on how to call stored procedure in dropwizard using JDBI.
With JDBI it is possible to specify an object SQL query as a method annotation. This string is treated by the DB as normal SQL. An example DAO to execute a stored procedure might look like:
public interface SomeQueries
{
#SqlQuery("call find_name_procedure(:id)")
String findName(#Bind("id") int id);
}
Where find_name_procedure has been previously defined.
For more information see http://jdbi.org/sql_object_api_queries/
Jooq is an elegant way to call stored procedures from java (See https://dzone.com/articles/using-stored-procedures-with-jpa-jdbc-meh-just-use). You also have a thirdparty module integrating Jooq into Dropwizard
(See http://modules.dropwizard.io/thirdparty/)
So if you're familiar with Maven, you can set up the combination quickly and start validating if it works in your case.
DropWizard JDBI provides two options to make a stored procedure call. Depending on what you want from Stored proc.
If you want resultset from Stored Proc, Andy has answered that already:
public interface DAO
{
#SqlQuery("call sp_name(:id)")
String query(#Bind("id") int id);
}
The other scenario is that your stored proc doesn't return resultset but gives out some output parameters. Here is what you can do:
#SqlCall("{ CALL sp_name(:id, :id2) }")
#OutParameter(name = "out", sqlType = Types.INTEGER)
OutParameters spCal(#Bind("id") long id, #Bind("id2") long id2);
OutParameter annotation may not work in DropWizard as the annotation was introduced in v3, you can use the following for accessing OutParameters:
try (Handle handle = dbi.open()) {
parameters = handle.createCall("CALL sp_name(:IN_Field1,:OUT_field2)")
.bind("IN_Field1", filed1)
.registerOutParameter("OUT_field2", Types.INTEGER)
.invoke();
}
And for some real freaky situations where you will need both Outparameters and resultset - DropWizard currently doesn't provide any direct way (Because the JDBI version with dropwizard is old). So, you can get connection by doing below:
handle = jdbi.open()
handle.getConnection()
And then do what you want to do with the connection.
Also, one more thing - I will not try to use Hibernate for Stored Proc call. Its just more pain.
I used Zalando Sprocwrapper. I like it and was widely used in the Zalando company to call PostgreSQL functions.
https://github.com/zalando-incubator/java-sproc-wrapper
I am using VS2010, Entity Framework 4.0, and Advantage v. 10 in my application. I am trying to make a UDF I have defined in my Advantage DB available to my application code. The designer does not show the UDF under stored procs in the "Update Model from Database" wizard as I would expect it to. So I manually added the UDF to the SSDL as follows:
<Function Name="Test" ReturnType="numeric" Aggregate="false" BuiltIn="false" NiladicFunction="false" IsComposable="true" ParameterTypeSemantics="AllowImplicitConversion">
<Parameter Name="PartID" Type="integer" Mode="In"/>
</Function>
I also added a CLR method stub:
[EdmFunction("namespace.Store", "Test")]
public static decimal Test(int partID)
{
throw new InvalidOperationException("Call from within an L2E query");
}
I can see the function in my Linq-to-Entities statement; however, the generated SQL is not valid. Using ToTraceString, the UDF call looks something like this:
"namespace.Store"."Test"("Project3"."PartID") AS "C4"
This gives me the following error:
System.Data.EntityCommandExecutionException: An error occurred while executing the command definition. See the inner exception for details. ---> Advantage.Data.Provider.AdsException: Error 7200: AQE Error: State = 42000; NativeError = 2117; [iAnywhere Solutions][Advantage SQL Engine]Unexpected token: Scalar function name should not be delimited.
It works fine if I run the generated SQL in Advantage Data Architect and correct the function name like so:
Test("Project3"."PartID") AS "C4"
Is there anyway to tell Entity Framework to generate the correct SQL? Am I doing something wrong in the definition of the function in the SSDL?
Thanks in advance.
You need to change your function element to have BuiltIn="true". User Defined Functions are not quoted in the Advantage SQL grammar.
It looks good. Only thing i would recommend is to change the decimal to be nullable but i doubt that would fix the problem because then you would see a different exception. its worth a try. I do covered the function a while back.
http://weblogs.asp.net/zeeshanhirani/archive/2010/04/08/calling-user-defined-database-function-from-linq.aspx
I'm working on a biztalk project and use a map to create the new message.
Now i want to map a datefield to a string.
I thought i can do it on this way with an Function Script with inline C#
public string convertDateTime(DateTime param)
{
return System.Xml.XmlConvert.ToString(param,ÿyyyMMdd");
}
But this doesn't work and i receive an error. How can i do the convert in the map?
It's a Biztalk 2006 project.
Without the details of the error you are seeing it is hard to be sure but I'm quite sure that your map is failing because all the parameters within the BizTalk XSLT engine are passed as strings1.
When I try to run something like the function you provided as inline C# I get the following error:
Object of type 'System.String' cannot be converted to type 'System.DateTime'
Replace your inline C# with something like the following:
public string ConvertDateTime(string param1)
{
DateTime inputDate = DateTime.Parse(param1);
return inputDate.ToString("yyyyMMdd");
}
Note that the parameter type is now string, and you can then convert that to a DateTime and perform your string format.
As other answers have suggested, it may be better to put this helper method into an external class - that way you can get your code under test to deal with edge cases, and you also get some reuse.
1 The fact that all parameters in the BizTalk XSLT are strings can be the source of a lot of gotchas - one other common one is with math calculations. If you return numeric values from your scripting functoids BizTalk will helpfully convert them to strings to map them to the outbound schema but will not so helpfully perform some very random rounding on the resulting values. Converting the return values to strings yourself within the C# will remove this risk and give you the expected results.
If you're using the mapper, you just need a Scripting Functiod (yes, using inline C#) and you should be able to do:
public string convertDateTime(DateTime param)
{
return(param.ToString("YYYYMMdd");
}
As far as I know, you don't need to call the System.Xml namespace in anyway.
I'd suggest
public static string DateToString(DateTime dateValue)
{
return String.Format("{0:yyyyMMdd}", dateValue);
}
You could also create a external Lib which would provide more flexibility and reusability:
public static string DateToString(DateTime dateValue, string formatPicture)
{
string format = formatPicture;
if (IsNullOrEmptyString(formatPicture)
{
format = "{0:yyyyMMdd}";
}
return String.Format(format, dateValue);
}
public static string DateToString(DateTime dateValue)
{
return DateToString(dateValue, null);
}
I tend to move every function I use twice inside an inline script into an external lib. Iit will give you well tested code for all edge cases your data may provide because it's eays to create tests for these external lib functions whereas it's hard to do good testing on inline scripts in maps.
This blog will solve your problem.
http://biztalkorchestration.blogspot.in/2014/07/convert-datetime-format-to-string-in.html?view=sidebar
Regards,
AboorvaRaja
Bangalore
+918123339872
Given that maps in BizTalk are implemented as XSL stylesheets, when passing data into a msxsl scripting function, note that the data will be one of types in the Equivalent .NET Framework Class (Types) from this table here. You'll note that System.DateTime isn't on the list.
For parsing of xs:dateTimes, I've generally obtained the /text() node and then parse the parameter from System.String:
<CreateDate>
<xsl:value-of select="userCSharp:GetDateyyyyMMdd(string(s0:StatusIdChangeDate/text()))" />
</CreateDate>
And then the C# script
<msxsl:script language="C#" implements-prefix="userCSharp">
<![CDATA[
public System.String GetDateyyyyMMdd(System.String p_DateTime)
{
return System.DateTime.Parse(p_DateTime).ToString("yyyyMMdd");
}
]]>
I have a versioned model:
public class VersionedModel
{
public Binary Version { get; set; }
}
Rendered using
<%= Html.Hidden("Version") %>
it gives:
<input id="Version" name="Version" type="hidden" value=""AQID"" />
that looks a bit strange. Any way, when the form submitted, the Version field is always null.
public ActionResult VersionedUpdate(VersionedModel data)
{
...
}
How can I pass Version over the wire?
EDIT:
A naive solution is:
public ActionResult VersionedUpdate(VersionedModel data)
{
data.Version = GetBinaryValue("Version");
}
private Binary GetBinaryValue(string name)
{
return new Binary(Convert.FromBase64String(this.Request[name].Replace("\"", "")));
}
Related posts I found.
Link
Suggests to turn 'Binary Version' into 'byte[] Version', but some commenter noticed:
The problem with this approach is that
it doesn't work if you want to use the
Table.Attach(modified, original)
overload, such as when you are using a
disconnected data context.
Link
Suggests a solution similar to my 'naive solution'
public static string TimestampToString(this System.Data.Linq.Binary binary)
{ ... }
public static System.Data.Linq.Binary StringToTimestamp(this string s)
{ ... }
http://msdn.microsoft.com/en-us/library/system.data.linq.binary.aspx
If you are using ASP.Net and use the
SQL Server "timestamp" datatype for
concurrency, you may want to convert
the "timestamp" value into a string so
you can store it (e.g., on a web
page). When LINQ to SQL retrieves a
"timestamp" from SQL Server, it stores
it in a Binary class instance. So you
essentially need to convert the Binary
instance to a string and then be able
to convert the string to an equivalent
Binary instance.
The code below provides two extension
methods to do this. You can remove the
"this" before the first parameter if
you prefer them to be ordinary static
methods. The conversion to base 64 is
a precaution to ensure that the
resultant string contains only
displayable characters and no escape
characters.
public static string ConvertRowVersionToString(this Binary rowVersion) {
return Convert.ToBase64String(rowVersion.ToArray());
}
public static Binary ConvertStringToRowVersion(this string rowVersion) {
return new Binary(Convert.FromBase64String(rowVersion));
}
I think the problem with not seeing it in the bound model on form submission is that there is no Convert.ToBinary() method available to the model binary to restructure the data from a string to it's binary representation. If you want to do this, I think that you'll need to convert the value by hand. I'm going to guess that the value you are seeing is the Base64 encoding of the binary value -- the output of Binary.ToString(). In that case, you'll need to convert it back from Base64 to a byte array and pass that to the Binary() constructor to reconstitute the value.
Have you thought about caching the object server-side, instead? This could be a little tricky as well as you have to detach the object from the data context (I'm assuming LINQ) or you wouldn't be able to reattach it to a different data context. This blog entry may be helpful if you decide to go that route.
You may need to use binding to get a strongly-typed parameter to your action method.
Try rendering using:
<%=Html.Hidden("VersionModel.Version")%>
And defining your action method signature as:
public ActionResult VersionedUpdate([Bind(Prefix="VersionModel")] VersionedModel data)
{
...
}
This post http://forums.asp.net/p/1401113/3032737.aspx#3032737 suggests to use
LinqBinaryModelBinder from http://aspnet.codeplex.com/SourceControl/changeset/view/21528#338524.
Once registered
protected void Application_Start()
{
ModelBinders.Binders.Add(typeof(Binary), new LinqBinaryModelBinder());
}
the binder will automatically deserialize Version field
public ActionResult VersionedUpdate(VersionedModel data)
{ ... }
rendered this way:
<%= Html.Hidden("Version") %>
(See also http://stephenwalther.com/blog/archive/2009/02/25/asp.net-mvc-tip-49-use-the-linqbinarymodelbinder-in-your.aspx)
There are many ways like here
byte[] b = BitConverter.GetBytes(DateTime.Now.Ticks);//new byte [(DateTime.Now).Ticks];
_store.Version = new System.Data.Linq.Binary(b)
(make sure you bind exclude your version),
But the best way is to let the DB handle it...
There are many ways like here
byte[] b = BitConverter.GetBytes(DateTime.Now.Ticks);//new byte [(DateTime.Now).Ticks]; _store.Version = new System.Data.Linq.Binary(b)
(make sure you bind exclude your version),
But the best way is to let the DB handle it...