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"Multiple step OLE DB operation generate error" on MSSQL2K and ADO/Command.Execute

tumur
tumur asked
on
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Last Modified: 2008-02-01
I'm getting error "Multiple step OLE DB operation generate error..."
when inserting a new record into the following table:

CREATE TABLE Profession
(
  SeekerID INTEGER NOT NULL,
  SkillName NVARCHAR(30) NOT NULL,
  JobType SMALLINT,
  SubType SMALLINT,
  Prime BIT NOT NULL DEFAULT 1,
 
  PRIMARY KEY (SeekerID, SkillName),
  FOREIGN KEY (SeekerID) REFERENCES Seekers (SeekerID),
  FOREIGN KEY (JobType) REFERENCES JobTypes (TypeID),
  FOREIGN KEY (SubType) REFERENCES SubTypes (SubID),
  CHECK (JobType IS NOT NULL OR SubType IS NULL)
)

The JScript code is simple:

cmd.CommandText = "INSERT INTO Profession (SeekerID, SkillName, JobType, SubType, Prime) VALUES (?, ?, ?, ?, ?)";
cmd.CommandType = adCmdText;
cmd.Prepared = true;
cmd.Parameters.Append(cmd.CreateParameter('SeekerID', adInteger, adParamInput));
cmd.Parameters.Append(cmd.CreateParameter('SkillName', adVarWChar, adParamInput, 30));
cmd.Parameters.Append(cmd.CreateParameter('JobType', adSmallInt, adParamInput));
cmd.Parameters.Append(cmd.CreateParameter('SubType', adSmallInt, adParamInput));
cmd.Parameters.Append(cmd.CreateParameter('Prime', adBoolean, adParamInput));
cmd('SeekerID') = seeker_id;
cmd('SkillName') = pro_skillname;
cmd('JobType').Value = null;
cmd('SubType').Value = null;
cmd('Prime').Value = true;
cmd.Execute();

I'm executing a long transaction like:

con.BeginTrans()
//insert into master table
....
//delete from sub table # 1
....
//insert into sub table # 1
....

//delete from sub table # 5
....
//insert into sub table # 5
....
con.CommitTrans();

The table Profession is 3th table. I use one Command (cmd) object for all INSERT operations.
Hope Command object automatically clears its Parameters collection when CommandText
property is updated.
The DELETE operations do not use Command object because they are simple, so I use
direct con.Execute() for them.

My platform: WinXP Pro, MSSQL 2000, MDAC 2.8 and JScript 5.6

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