Method SetQuery

IO/SQL/vtkSQLiteQuery.cxx:87–166

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

//------------------------------------------------------------------------------
bool vtkSQLiteQuery::SetQuery(const char* newQuery)
{
  vtkDebugMacro(<< this->GetClassName() << " (" << this << "): setting Query to "
                << (newQuery ? newQuery : "(null)"));

  if (this->Query == nullptr && newQuery == nullptr)
  {
    return true;
  }

  if (this->Query && newQuery && (!strcmp(this->Query, newQuery)))
  {
    return true; // we've already got that query
  }

  delete[] this->Query;

  if (newQuery)
  {
    // Keep a local copy of the query - this is from vtkSetGet.h
    size_t n = strlen(newQuery) + 1;
    char* cp1 = new char[n];
    const char* cp2 = (newQuery);
    this->Query = cp1;
    do
    {
      *cp1++ = *cp2++;
    } while (--n);
  }
  else
  {
    this->Query = nullptr;
  }

  // If we get to this point the query has changed.  We need to
  // finalize the already-prepared statement if one exists and then
  // prepare a new statement.
  if (this->Private->Statement)
  {
    vtkDebugMacro(<< "Finalizing old statement");
    int finalizeStatus = sqlite3_finalize(this->Private->Statement);
    if (finalizeStatus != SQLITE_OK)
    {
      vtkWarningMacro(<< "SetQuery(): Finalize returned unexpected code " << finalizeStatus);
    }
    this->Private->Statement = nullptr;
  }

  if (this->Query)
  {
    vtkSQLiteDatabase* dbContainer = vtkSQLiteDatabase::SafeDownCast(this->Database);

    if (dbContainer == nullptr)
    {
      vtkErrorMacro(<< "This should never happen: SetQuery() called when there is no underlying "
                       "database.  You probably instantiated vtkSQLiteQuery directly instead of "
                       "calling vtkSQLDatabase::GetInstance().  This also happens during "
                       "TestSetGet in the CDash testing.");