Method RequestData

IO/SQL/vtkSQLDatabaseTableSource.cxx:151–264

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
int vtkSQLDatabaseTableSource::RequestData(
  vtkInformation*, vtkInformationVector**, vtkInformationVector* outputVector)
{
  if (this->Implementation->URL.empty())
    return 1;

  if (this->Implementation->QueryString.empty())
    return 1;

  if (!this->PedigreeIdArrayName)
  {
    vtkErrorMacro(<< "You must specify a pedigree id array name.");
    return 0;
  }

  if (!this->Implementation->Database)
  {
    this->Implementation->Database =
      vtkSQLDatabase::CreateFromURL(this->Implementation->URL.c_str());
    if (!this->Implementation->Database)
    {
      vtkErrorMacro(<< "Error creating database using URL: " << this->Implementation->URL);
      return 0;
    }

    if (!this->Implementation->Database->Open(this->Implementation->Password.c_str()))
    {
      this->Implementation->Database->Delete();
      this->Implementation->Database = nullptr;

      vtkErrorMacro(<< "Error opening database: " << this->Implementation->URL);
      return 0;
    }
  }

  if (!this->Implementation->Query)
  {
    this->Implementation->Query = this->Implementation->Database->GetQueryInstance();
    if (!this->Implementation->Query)
    {
      vtkErrorMacro(<< "Internal error creating query instance.");
      return 0;
    }
  }

  // Set Progress Text
  this->SetProgressText("DatabaseTableSource");

  // I have a database: 5% progress
  this->UpdateProgress(.05);

  this->Implementation->Query->SetQuery(this->Implementation->QueryString.c_str());
  if (!this->Implementation->Query->Execute())
  {
    vtkErrorMacro(<< "Error executing query: " << this->Implementation->QueryString);
    return 0;
  }