Method SetBuffer

storage/connect/tabsys.cpp:401–445

/ SetBuffer: prepare a column block for write operation. */ /

/*  SetBuffer: prepare a column block for write operation.             */
/***********************************************************************/
bool INICOL::SetBuffer(PGLOBAL g, PVAL value, bool ok, bool check)
  {
  if (!(To_Val = value)) {
    snprintf(g->Message, sizeof(g->Message), MSG(VALUE_ERROR), Name);
    return true;
  } else if (Buf_Type == value->GetType()) {
    // Values are of the (good) column type
    if (Buf_Type == TYPE_DATE) {
      // If any of the date values is formatted
      // output format must be set for the receiving table
      if (GetDomain() || ((DTVAL *)value)->IsFormatted())
        goto newval;          // This will make a new value;

    } else if (Buf_Type == TYPE_DOUBLE || Buf_Type == TYPE_DECIM)
      // Float values must be written with the correct (column) precision
      // Note: maybe this should be forced by ShowValue instead of this ?
      value->SetPrec(GetScale());

    Value = value;            // Directly access the external value
  } else {
    // Values are not of the (good) column type
    if (check) {
      snprintf(g->Message, sizeof(g->Message), MSG(TYPE_VALUE_ERR), Name,
              GetTypeName(Buf_Type), GetTypeName(value->GetType()));
      return true;
      } // endif check

 newval:
    if (InitValue(g))         // Allocate the matching value block
      return true;

  } // endif's Value, Buf_Type

  // Allocate the internal value buffer
  AllocBuf(g);

  // Because Colblk's have been made from a copy of the original TDB in
  // case of Update, we must reset them to point to the original one.
  if (To_Tdb->GetOrig())
    To_Tdb = (PTDB)To_Tdb->GetOrig();

  // Set the Column
  Status = (ok) ? BUF_EMPTY : BUF_NO;
  return false;
  } // end of SetBuffer

/***********************************************************************/
/*  ReadColumn: what this routine does is to access the key buffer set */