int nValue;
    if( azAppend[i] ){
      blob_appendf(&tktchng, "J +%s %z\n", azField[i],
                   fossilize(azAppend[i], -1));
    }else{
      zValue = Th_Fetch(azField[i], &nValue);
      if( zValue ){
        while( nValue>0 && fossil_isspace(zValue[nValue-1]) ){ nValue--; }
        if( strncmp(zValue, azValue[i], nValue) || strlen(azValue[i])!=nValue ){
          if( strncmp(azField[i], "private_", 8)==0 ){
            zValue = db_conceal(zValue, nValue);
            blob_appendf(&tktchng, "J %s %s\n", azField[i], zValue);
          }else{
            blob_appendf(&tktchng, "J %s %#F\n", azField[i], nValue, zValue);
          }