I'm using fluent nhibernate and I cannot use stored procedure and excute it.
I tried:
Session.GetNamedQuery("Select_All_Question_Groups");
and:
const string sql = "EXEC [dbo].[Stored_Procedure_Name] #PortalId=:PortalId";
return _session.CreateSQLQuery(sql).SetInt32("PortalId", portalId)
const string sql = "call [dbo].[Stored_Procedure_Name] #PortalId=:PortalId";
return _session.CreateSQLQuery(sql).SetInt32("PortalId", portalId)
const string sql = "EXEC [dbo].[Stored_Procedure_Name](PortalId=:PortalId)";
return _session.CreateSQLQuery(sql).SetInt32("PortalId", portalId)
But none of those options works.
when I use session.GetNamedQuery() I got error that the procedure does not exist.
In the other options there is no error, but the procedue does not change anything.
Related
I have an application that was calling an Oracle stored procedure by passing a string with the parameters in the string, i.e.
string Query = "CALL MySP(" + Variable1 + ", " + Variable2 + ")";
This worked, or at least the last time I tried it it worked.
I need to rewrite the query using DynamicParameters.
However when I do an Execute(Query, Parms, commandType: CommandType.StoredProcedure), I get errors.
Here is an example of what I tried:
using(OracleConnection conn = new OracleConnection(myConnectionString)
{
string Query = "CALL MySP(:Var1, :Var2)";
DynamicParameters parms = new DynamicParameters();
parms.Add("Var1", Variable1, DbType.String, ParameterDirection.Input);
parms.Add("Var2", Variable2, DbType.String, ParameterDirection.Input);
var results = connection.Execute(Query, parms, commandType: CommandType.StoredProcedure);
}
When I run it with the above query, I get this error:
ORA-06550: line 1, column 12:
PLS-00103: Encountered the symbol "MySP" when expecting one of the following:
:= . ( # % ;
The symbol ":=" was substituted for "MySP" to continue.
If I remove the CALL statement:
Query = "MySP(:Var1, :Var2);
then I get this error message:
ORA-01008: not all variables bound
Can anyone see what I am doing wrong?
The problem is that I keep looking on the C# and Dapper side of the equation. Our Oracle DBA set the permissions on the Stored Procedure and it ran.
However I could not tell Dapper that the CommandType was Stored Procedure and my string to call the stored procedure had to look like:
string Query = "CALL MySP(:Var1, :Var2)";
If I removed "CALL" I got an error. If I added "commandType: CommandType.StoredProcedure" to the Dapper Execute function I got a binding error.
Our DBA said he was going to look more into it to see what he can find out on his end so that we can call the stored procedure using the CommandType.StoreProcedure parameter in the Execute function.
I have a oracle function. function name is TESTFUNCTION. The code i used is
PreparedStatement pStmt = con.prepareStatement("SELECT dbo.TESTFUNCTION(?,?)") ;
and I set the parameters also.
ResultSet rs = pStmt.executeQuery();
This code will produce the below exception
java.sql.SQLSyntaxErrorException: ORA-00923: FROM keyword not found where expected
Any Help!!
You are missing the FROM keyword. Change to this:
PreparedStatement pStmt = con.prepareStatement("SELECT dbo.TESTFUNCTION(?,?) FROM dual;") ;
A PreparedStatement is useful for SQL queries and not for function call. For function calls and stored procedures, use CallableStatement.
This error occurs when you try to execute a SELECT statement, and you either missed or misplaced the FROM keyword. Try to check for the from keyword.
Check here for details.
Note: It would be preferrable to use Callable Statement instead of prepared statement in such cases.
You could use callable statement in this case as:
String SQL = "{call dbo.TESTFUNCTION(?,?)}";
cstmt = con.prepareCall (SQL);
I'm using a product that provides a database API based on Oracle functions and I'm able to call functions via ODP.NET in general. However, I can't figure out, how to call a function that includes a Ref Cursor as Out-parameter. All the samples I found so far either call a procedure with Out-parameter or a function with the Ref Cursor as return value. I tried to define the parameters similiarly, but keep getting the error that the wrong number or type of parameters is supplied.
Here is the function header (obviously obfuscated):
FUNCTION GetXYZ(
uniqueId IN somepackage.Number_Type,
resultItems OUT somepackage.Ref_Type)
RETURN somepackage.Error_Type;
These are the type definitions in "somepackage":
SUBTYPE Number_Type IS NUMBER(13);
TYPE Ref_Type IS REF CURSOR;
SUBTYPE Error_Type IS NUMBER;
And this is the code that I have tried:
string sql = "otherpackage.GetXYZ";
var getXYZCmd = OracleCommand oracleConnection.CreateCommand(sql);
getXYZCmd.CommandType = CommandType.StoredProcedure;
getXYZCmd.Parameters.Add("uniqueId", OracleDbType.Int32).Value = uniqueExplosionId;
getXYZCmd.Parameters.Add("resultItems", OracleDbType.RefCursor).Direction = ParameterDirection.Output;
getXYZCmd.Parameters.Add("return_value", OracleDbType.Int32).Direction = ParameterDirection.ReturnValue;
The I tried the following different ways to call the function (of course only one at a time):
var result = getXYZCmd.ExecuteNonQuery();
var reader = getXYZCmd.ExecuteReader();
var scalarResult = getXYZCmd.ExecuteScalar();
But each of them fails with the error message:
Oracle.DataAccess.Client.OracleException: ORA-06550: line 1, column 15:
PLS-00306: wrong number or types of arguments in call to 'GETXYZ'
ORA-06550: line 1, column 15:
PLS-00306: wrong number or types of arguments in call to 'GETXYZ'
ORA-06550: line 1, column 7:
PL/SQL: Statement ignored.
So is it generally possible to call a function with a Ref Cursor as Out-parameter from C# with ODP.NET? I can call a function with the same structure with a Varchar2-Out-parameter instead of the Ref Cursor without problems...
Btw, I'm using ODP.NET version 2.112.2.0 from C#.NET 3.5 in Visual Studio 2008.
Thanks in advance for your help!
You sure can. There are a few gotchas to be wary of but here is a test case
create or replace function testodpRefCursor(
uniqueId IN NUMBER
,resultItems OUT NOCOPY SYS_REFCURSOR) RETURN NUMBER
IS
BEGIN
OPEN resultItems for select level from dual connect by level < uniqueId ;
return 1;
END testodpRefCursor;
I have found that
functions likes to have the
ReturnValue as THE FIRST param
in the collection
BindByName is by default FALSE, so it defaults to BIND BY POSITION
Otherwise it is quite straight forward:
OracleCommand cmd = new OracleCommand("TESTODPREFCURSOR", con);
cmd.CommandType = CommandType.StoredProcedure;
cmd.BindByName = true;
// Bind
OracleParameter oparam = cmd.Parameters.Add("ReturnValue", OracleDbType.Int64);
oparam.Direction = ParameterDirection.ReturnValue ;
OracleParameter oparam0 = cmd.Parameters.Add("uniqueId", OracleDbType.Int64);
oparam0.Value = 5 ;
oparam0.Direction = ParameterDirection.Input;
OracleParameter oparam1 = cmd.Parameters.Add("resultItems", OracleDbType.RefCursor);
oparam1.Direction = ParameterDirection.Output;
// Execute command
OracleDataReader reader;
try
{
reader = cmd.ExecuteReader();
while(reader.Read() ){
Console.WriteLine("level: {0}", reader.GetDecimal(0));
}
} ...
Now for more samples go to your Oracle Home directory and look # the Ref cursor samples in ODP.NET
for instance:
%oracle client home%\odp.net\samples\4\RefCursor
hth
I am trying to execute a user-defined Oracle function that returns a RefCursor using ODP.NET. Here is the function:
CREATE OR REPLACE FUNCTION PKG.FUNC_TEST (ID IN TABLE.ID%type)
RETURN SYS_REFCURSOR
AS
REF_TEST SYS_REFCURSOR;
BEGIN
OPEN REF_TEST FOR
SELECT *
FROM TABLE;
RETURN REF_TEST;
END;
/
I can call this function in Toad (select func_test(7) from dual) and get back a CURSOR. But I need to get the cursor using C# and ODP.NET to fill a DataSet, but I keep getting a NullReferenceException - "Object reference not set to an instance of an object". Here is what I have for that:
OracleConnection oracleCon = new OracleConnection(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString);
OracleCommand sqlCom = new OracleCommand("select func_test(7) from dual", oracleCon);
sqlCom.Parameters.Add("REF_TEST", OracleDbType.RefCursor, ParameterDirection.ReturnValue);
OracleDataAdapter dataAdapter = new OracleDataAdapter();
dataAdapter.SelectCommand = sqlCom;
DataSet dataSet = new DataSet();
dataAdapter.Fill(dataSet); //FAILS HERE with NullReferenceException
I was able to find lots of info and samples on using stored procedures and ODP.NET, but not so much for returning RefCursors from functions.
EDIT: I do not want to explicitly add input parameters to the OracleCommand object (i.e. sqlCom.Parameters.Add("id", OracleDbType.Int32,ParameterDirection.Input).Value = 7;) as that makes it difficult to implement this as a generic RESTful web service, but I'm reserving it as my last resort but would use stored procedures instead.
Any help is much appreciated!
I think you are missing the sqlCom.ExecuteNonQuery();
also, instead of running the select func_test(7) from dual; lets switch it to run the function and pass in the param
OracleConnection oracleCon = new OracleConnection(ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString);
// Set the command
string anonymous_block = "begin " +
" :refcursor1 := func_test(7) ;" +
"end;";
//fill in your function and variables via the above example
OracleCommand sqlCom= con.CreateCommand();
sqlCom.CommandText = anonymous_block;
// Bind
sqlCom.Parameters.Add("refcursor1", OracleDbType.RefCursor);
sqlCom.Parameters[0].Direction = ParameterDirection.ReturnValue;
try
{
// Execute command; Have the parameters populated
sqlCom.ExecuteNonQuery();
// Create the OracleDataAdapter
OracleDataAdapter da = new OracleDataAdapter(sqlCom);
// Populate a DataSet with refcursor1.
DataSet ds = new DataSet();
da.Fill(ds, "refcursor1", (OracleRefCursor)(sqlCom.Parameters["refcursor1"].Value));
// Print out the field count the REF Cursor
Console.WriteLine("Field count: " + ds.Tables["refcursor1"].Columns.Count);
}
catch (Exception e)
{
Console.WriteLine("Error: {0}", e.Message);
}
finally
{
// Dispose OracleCommand object
cmd.Dispose();
// Close and Dispose OracleConnection object
con.Close();
con.Dispose();}
this is based on the example ODP that can be found # %ora_home%\Client_1\ODP.NET\samples\RefCursor\Sample5.csproj
If you want to avoid (for better or worst!) the custom built param collection for each proc/function call you can get around that by utilizing anonymous blocks in your code, I have ammended (once again untested!) the code above to reflect this technique.
Here is a nice blog (from none other than Mark Williams) showing this technique.
http://oradim.blogspot.com/2007/04/odpnet-tip-anonymous-plsql-and.html
I'm trying to map OleDb parameters to an Oracle Function. I was able to do this using the System.Data.Oracle namespace but then found that this is depricated, so I thought i would re-write it as OldDb to avoid installing the Oracle Provider.
I have defined the following oracle function as an example:
create function GetImagePath (AIRSNumber in number)
return varchar2
is
begin
return '\\aiimg524\images\Ofndrtrk\2010\01\0kvrv1p000lcs74j';
end;
and I'm calling it using the following code:
using (var command = new OleDbCommand())
{
command.Connection = con;
command.CommandText = ConfigurationManager.AppSettings[OTRAK_PHOTO_FUNC];
command.CommandType = CommandType.StoredProcedure;
string parm = ConfigurationManager.AppSettings[OTRAK_PHOTO_PARM];
command.Parameters.Add(parm, OleDbType.Decimal); // maps to oracle Number
command.Parameters[parm].Direction = ParameterDirection.Input;
command.Parameters[parm].Value = airsNumber;
command.Parameters.Add(RETURN_VALUE, OleDbType.Variant); // maps to Oracle varchar2
command.Parameters[RETURN_VALUE].Direction = ParameterDirection.ReturnValue;
try
{
con.Open();
command.ExecuteNonQuery();
path = command.Parameters[RETURN_VALUE].Value.ToString();
}
I tried a bunch of different OleDB types for the parameter and the return value. the current attempt is from a mapping table i found on the web that said number = decimal and varchar2 = variant. I'm about to try every permutation of types in the enum and wanted to ask for help. the not so useful error message i get is:
[System.Data.OleDb.OleDbException] = {"ORA-06550: line 1, column 7:\nPLS-00306: wrong number or types of arguments in call to 'GETIMAGEPATH'\nORA-06550: line 1, column 7:\nPL/SQL: Statement ignored"}
This actually had nothing to do with the type of the parameters but the order. Using the OleDb provider for Oracle does not respect the names of the parameters in the parameter collection but rather the order that the parameters are added. Wwhen calling an oracle function, the return value is a free parameter that must be declared first. by adding my return value parameter and then the actual function parameter things started working.
using the command.Parameters.AddWithValue(parm, value) also simplifies things a bit.