- Implement the SERVID special columns. This imply modifying the way

  special columns are processed. This will be documented.
  Also some code cleanup and some changes to prepare the indexing of
  nullable columns (not achieve yet)

modified:
  storage/connect/colblk.cpp
  storage/connect/colblk.h
  storage/connect/connect.cc
  storage/connect/connect.h
  storage/connect/ha_connect.cc
  storage/connect/ha_connect.h
  storage/connect/macutil.cpp
  storage/connect/mycat.cc
  storage/connect/plgdbsem.h
  storage/connect/reldef.cpp
  storage/connect/reldef.h
  storage/connect/table.cpp
  storage/connect/tabmysql.cpp
  storage/connect/tabmysql.h
  storage/connect/tabodbc.h
  storage/connect/tabtbl.cpp
  storage/connect/tabutil.h
  storage/connect/value.h
  storage/connect/xindex.cpp
  storage/connect/xindex.h
  storage/connect/xtable.h

storage/connect/colblk.cpp

@@ -350,8 +350,7 @@ TIDBLK::TIDBLK(PCOLUMN cp) : SPCBLK(cp)
   *Format.Type = 'C';
   Format.Length = Long;
   Format.Prec = 1;          // Case insensitive
-  Constant = (To_Tdb->GetAmType() != TYPE_AM_PLG &&
-              To_Tdb->GetAmType() != TYPE_AM_PLM);
+  Constant = (To_Tdb->GetAmType() != TYPE_AM_TBL);
   Tname = NULL;
   } // end of TIDBLK constructor
 
@@ -367,3 +366,30 @@ void TIDBLK::ReadColumn(PGLOBAL g)
 
   } // end of ReadColumn
 
+/***********************************************************************/
+/*  SIDBLK constructor for the SERVID special column.                  */
+/***********************************************************************/
+SIDBLK::SIDBLK(PCOLUMN cp) : SPCBLK(cp)
+  {
+//Is_Key = 2; for when the MUL table indexed reading will be implemented.
+  Long = 64;
+  Buf_Type = TYPE_STRING;
+  *Format.Type = 'C';
+  Format.Length = Long;
+  Format.Prec = 1;          // Case insensitive
+  Constant = (To_Tdb->GetAmType() != TYPE_AM_TBL);
+  Sname = NULL;
+  } // end of TIDBLK constructor
+
+/***********************************************************************/
+/*  ReadColumn: what this routine does is to return the server ID.     */
+/***********************************************************************/
+void SIDBLK::ReadColumn(PGLOBAL g)
+  {
+//if (Sname == NULL) {
+    Sname = (char*)To_Tdb->GetServer();
+    Value->SetValue_psz(Sname);
+//  } // endif Sname
+
+  } // end of ReadColumn
+

storage/connect/colblk.h

@@ -179,4 +179,29 @@ class TIDBLK : public SPCBLK {
   PSZ  Tname;                       // The current table name
   }; // end of class TIDBLK
 
+/***********************************************************************/
+/*  Class SIDBLK: SERVID special column descriptor.                    */
+/***********************************************************************/
+class SIDBLK : public SPCBLK {
+ public:
+  // Constructor
+  SIDBLK(PCOLUMN cp);
+
+  // Implementation
+  virtual int  GetAmType(void) {return TYPE_AM_SRVID;}
+
+  // Methods
+  virtual void Reset(void) {}       // This is a pseudo constant column
+  virtual int  CheckSpcCol(PTDB tdbp, int n)
+              {return (n == 3 && tdbp == To_Tdb) ? 1 : 2;}
+  virtual void ReadColumn(PGLOBAL g);
+
+ protected:
+  // Default constructor not to be used
+  SIDBLK(void) {}
+
+  // Members
+  PSZ  Sname;                       // The current server name
+  }; // end of class SIDBLK
+
 #endif // __COLBLK__H

storage/connect/connect.cc

@@ -239,7 +239,7 @@ bool CntOpenTable(PGLOBAL g, PTDB tdbp, MODE mode, char *c1, char *c2,
   char   *p;
   int     i, n;
   PCOL    colp;
-  PCOLUMN cp;
+//PCOLUMN cp;
   PDBUSER dup= PlgGetUser(g);
 
   if (xtrace)
@@ -251,6 +251,8 @@ bool CntOpenTable(PGLOBAL g, PTDB tdbp, MODE mode, char *c1, char *c2,
     return true;
     } // endif tdbp
 
+  tdbp->SetMode(mode);
+
   if (!c1) {
     if (mode == MODE_INSERT)
       // Allocate all column blocks for that table
@@ -261,12 +263,12 @@ bool CntOpenTable(PGLOBAL g, PTDB tdbp, MODE mode, char *c1, char *c2,
     if (xtrace)
       printf("Allocating column %s\n", p);
 
-    if (*p == '*') {
-      // This is a special column
-      cp= new(g) COLUMN(p + 1);
-      cp->SetTo_Table(tdbp->GetTable());
-      colp= ((PTDBASE)tdbp)->InsertSpcBlk(g, cp);
-    } else
+//    if (*p == '*') {
+//      // This is a special column
+//      cp= new(g) COLUMN(p + 1);
+//      cp->SetTo_Table(tdbp->GetTable());
+//      colp= ((PTDBASE)tdbp)->InsertSpcBlk(g, cp);
+//    } else
       colp= tdbp->ColDB(g, p, 0);
 
     if (!colp) {
@@ -330,7 +332,7 @@ bool CntOpenTable(PGLOBAL g, PTDB tdbp, MODE mode, char *c1, char *c2,
     printf("Opening table %s in mode %d tdbp=%p\n",
            tdbp->GetName(), mode, tdbp);
 
-  tdbp->SetMode(mode);
+//tdbp->SetMode(mode);
 
   if (del && ((PTDBASE)tdbp)->GetFtype() != RECFM_NAF) {  
     // To avoid erasing the table when doing a partial delete

storage/connect/connect.h

@@ -47,20 +47,9 @@ int   CntIndexRange(PGLOBAL g, PTDB ptdb, const uchar* *key, uint *len,
 PGLOBAL CntExit(PGLOBAL g);
 
 /***********************************************************************/
-/*  Definition of classes XCOLCRT, XIXDEF, XKPDEF, DOXDEF, TDBDOX      */
+/*  Definition of classes XKPDEF, DOXDEF, TDBDOX                       */
 /*  These classes purpose is chiefly to access protected items!        */
 /***********************************************************************/
-class XCOLCRT: public COLCRT {
-  friend class ha_connect;
-  friend bool CntCreateTable(PGLOBAL, char *, PCXF);
- public:
-  XCOLCRT(PSZ name) : COLCRT(name) {Nulls= -1;}        // Constructor
-  bool HasNulls(void) {return (Nulls != 0);}
-
-private:
-  int Nulls;
-  }; // end of class XCOLCRT
-
 class DOXDEF: public DOSDEF {
 //friend class TDBDOX;
 //friend int MakeIndex(PGLOBAL, PTDB, PIXDEF);
@@ -87,11 +76,7 @@ class XKPDEF: public KPARTDEF {
 //friend int CntMakeIndex(PGLOBAL, const char *, PIXDEF);
   friend int CntIndexInit(PGLOBAL, PTDB, int);
  public:
-  XKPDEF(const char *name, int n) : KPARTDEF((PSZ)name, n) {HasNulls= false;}
-  void   SetNulls(bool b) {HasNulls= b;}
-
- protected:
-  bool   HasNulls;            /* Can have null values                  */
+  XKPDEF(const char *name, int n) : KPARTDEF((PSZ)name, n) {}
   }; // end of class XKPDEF
 
 //RCODE CheckRecord(PGLOBAL g, PTDB tdbp, char *oldbuf, char *newbuf);

storage/connect/ha_connect.cc

@@ -873,11 +873,13 @@ void *ha_connect::GetColumnOption(PGLOBAL g, void *field, PCOLINFO pcf)
   pcf->Flags= 0;
 
   // Now get column information
+  pcf->Name= (char*)fp->field_name;
+
   if (fop && fop->special) {
-    pcf->Name= "*";
+    pcf->Fieldfmt= (char*)fop->special;
+    pcf->Flags= U_SPECIAL;
     return fldp;
-  } else
-    pcf->Name= (char*)fp->field_name;
+    } // endif special
 
   pcf->Prec= 0;
   pcf->Opt= (fop) ? (int)fop->opt : 0;
@@ -983,7 +985,7 @@ void *ha_connect::GetColumnOption(PGLOBAL g, void *field, PCOLINFO pcf)
   if (fp->comment.str && fp->comment.length) {
     pcf->Remark= (char*)PlugSubAlloc(g, NULL, fp->comment.length + 1);
     memcpy(pcf->Remark, fp->comment.str, fp->comment.length);
-    pcf->Remark[fp->comment.length] = 0;
+    pcf->Remark[fp->comment.length]= 0;
   } else
     pcf->Remark= NULL;
 
@@ -1071,6 +1073,7 @@ const char *ha_connect::GetTableName(void)
   return (tshp) ? tshp->table_name.str : table->s->table_name.str;
 } // end of GetTableName
 
+#if 0
 /****************************************************************************/
 /*  Returns the column real or special name length of a field.              */
 /****************************************************************************/
@@ -1083,7 +1086,7 @@ int ha_connect::GetColNameLen(Field *fp)
   if (fop && fop->special)
     n= strlen(fop->special) + 1;
   else
-    n= strlen(fp->field_name) + 1;
+    n= strlen(fp->field_name);
 
   return n;
 } // end of GetColNameLen
@@ -1113,6 +1116,7 @@ void ha_connect::AddColName(char *cp, Field *fp)
     strcpy(cp, (char*)fp->field_name);
 
 } // end of AddColName
+#endif // 0
 
 /****************************************************************************/
 /*  Get the table description block of a CONNECT table.                     */
@@ -1174,20 +1178,21 @@ bool ha_connect::OpenTable(PGLOBAL g, bool del)
     char        *p;
     unsigned int k1, k2, n1, n2;
     Field*      *field;
+    Field*       fp;
     MY_BITMAP   *map= table->read_set;
     MY_BITMAP   *ump= (xmod == MODE_UPDATE) ? table->write_set : NULL;
 
     k1= k2= 0;
     n1= n2= 1;         // 1 is space for final null character
 
-    for (field= table->field; *field; field++) {
-      if (bitmap_is_set(map, (*field)->field_index)) {
-        n1+= (GetColNameLen(*field) + 1);
+    for (field= table->field; fp= *field; field++) {
+      if (bitmap_is_set(map, fp->field_index)) {
+        n1+= (strlen(fp->field_name) + 1);
         k1++;
         } // endif
 
-      if (ump && bitmap_is_set(ump, (*field)->field_index)) {
-        n2+= GetColNameLen(*field);
+      if (ump && bitmap_is_set(ump, fp->field_index)) {
+        n2+= (strlen(fp->field_name) + 1);
         k2++;
         } // endif
 
@@ -1196,9 +1201,9 @@ bool ha_connect::OpenTable(PGLOBAL g, bool del)
     if (k1) {
       p= c1= (char*)PlugSubAlloc(g, NULL, n1);
 
-      for (field= table->field; *field; field++)
-        if (bitmap_is_set(map, (*field)->field_index)) {
-          AddColName(p, *field);
+      for (field= table->field; fp= *field; field++)
+        if (bitmap_is_set(map, fp->field_index)) {
+          strcpy(p, (char*)fp->field_name);
           p+= (strlen(p) + 1);
           } // endif used field
 
@@ -1208,9 +1213,9 @@ bool ha_connect::OpenTable(PGLOBAL g, bool del)
     if (k2) {
       p= c2= (char*)PlugSubAlloc(g, NULL, n2);
 
-      for (field= table->field; *field; field++)
-        if (bitmap_is_set(ump, (*field)->field_index)) {
-          AddColName(p, *field);
+      for (field= table->field; fp= *field; field++)
+        if (bitmap_is_set(ump, fp->field_index)) {
+          strcpy(p, (char*)fp->field_name);
           p+= (strlen(p) + 1);
           } // endif used field
 
@@ -1309,7 +1314,7 @@ int ha_connect::MakeRecord(char *buf)
     if (bitmap_is_set(map, fp->field_index)) {
       // This is a used field, fill the buffer with value
       for (colp= tdbp->GetColumns(); colp; colp= colp->GetNext())
-        if (!stricmp(colp->GetName(), GetColName(fp)))
+        if (!stricmp(colp->GetName(), (char*)fp->field_name))
           break;
 
       if (!colp) {
@@ -1920,7 +1925,7 @@ int ha_connect::optimize(THD* thd, HA_CHECK_OPT* check_opt)
         push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, 0, g->Message);
         rc= 0;
       } else
-        rc = HA_ERR_INTERNAL_ERROR;
+        rc= HA_ERR_INTERNAL_ERROR;
 
     } // endif's
 
@@ -3235,7 +3240,7 @@ int ha_connect::delete_or_rename_table(const char *name, const char *to)
   /* We have to retrieve the information about this table options. */
   ha_table_option_struct *pos;
   char         key[MAX_DBKEY_LENGTH], db[128], tabname[128];
-  int          rc = 0;
+  int          rc= 0;
   uint         key_length;
   TABLE_SHARE *share;
   THD         *thd= current_thd;
@@ -3851,7 +3856,7 @@ static int connect_assisted_discovery(handlerton *hton, THD* thd,
         dsn= (char*)PlugSubAlloc(g, NULL, strlen(dsn) + 1);
         strncpy(dsn, create_info->connect_string.str,
                      create_info->connect_string.length);
-        dsn[create_info->connect_string.length] = 0;
+        dsn[create_info->connect_string.length]= 0;
         mydef->SetName(create_info->alias);
         mydef->SetCat(cat);
 
@@ -3876,7 +3881,7 @@ static int connect_assisted_discovery(handlerton *hton, THD* thd,
       break;
 #endif   // WIN32
     case TAB_PIVOT:
-      supfnc = FNC_NO;
+      supfnc= FNC_NO;
     case TAB_PRX:
     case TAB_TBL:
     case TAB_XCL:

storage/connect/ha_connect.h

@@ -158,9 +158,9 @@ class ha_connect: public handler
   PIXDEF   GetIndexInfo(void);
   const char *GetDBName(const char *name);
   const char *GetTableName(void);
-  int      GetColNameLen(Field *fp);
-  char    *GetColName(Field *fp);
-  void     AddColName(char *cp, Field *fp);
+//int      GetColNameLen(Field *fp);
+//char    *GetColName(Field *fp);
+//void     AddColName(char *cp, Field *fp);
   TABLE   *GetTable(void) {return table;}
   bool     IsSameIndex(PIXDEF xp1, PIXDEF xp2);
 

storage/connect/macutil.cpp

@@ -315,4 +315,4 @@ bool MACINFO::GetOneInfo(PGLOBAL g, int flag, void *v, int lv)
     *((int*)v) = n;
 
   return false;
-  } // end of ReadColumn
+  } // end of GetOneInfo

storage/connect/mycat.cc

@@ -468,9 +468,9 @@ int MYCAT::GetColCatInfo(PGLOBAL g, PTABDEF defp)
         break;
 			} // endswitch tc
 
-		do {
+//		do {
 			field= Hc->GetColumnOption(g, field, pcf);
-			} while (field && (*pcf->Name =='*' /*|| pcf->Flags & U_VIRTUAL*/));
+//    } while (field && (*pcf->Name =='*' /*|| pcf->Flags & U_VIRTUAL*/));
 
 		if (tc == TAB_DBF && pcf->Type == TYPE_DATE && !pcf->Datefmt) {
 			// DBF date format defaults to 'YYYMMDD'

storage/connect/plgdbsem.h

@@ -319,7 +319,8 @@ enum COLUSE {U_P         = 0x01,      /* the projection list.          */
              U_VAR       = 0x10,      /* a VARCHAR column              */
              U_VIRTUAL   = 0x20,      /* a VIRTUAL column              */
              U_NULLS     = 0x40,      /* The column may have nulls     */
-             U_IS_NULL   = 0x80};     /* The column has a null value   */
+             U_IS_NULL   = 0x80,      /* The column has a null value   */
+             U_SPECIAL   = 0x100};    /* The column is special         */
 
 /***********************************************************************/
 /*  DB description class and block pointer definitions.                */

storage/connect/reldef.cpp

@@ -383,6 +383,7 @@ int COLDEF::Define(PGLOBAL g, void *memp, PCOLINFO cfp, int poff)
   Name = (PSZ)PlugSubAlloc(g, memp, strlen(cfp->Name) + 1);
   strcpy(Name, cfp->Name);
 
+  if (!(cfp->Flags & U_SPECIAL)) {
     Poff = poff;
     Buf_Type = cfp->Type;
 
@@ -398,7 +399,7 @@ int COLDEF::Define(PGLOBAL g, void *memp, PCOLINFO cfp, int poff)
     Long = cfp->Length;
     Opt = cfp->Opt;
     Key = cfp->Key;
-//Freq = cfp->Freq;
+//  Freq = cfp->Freq;
 
     if (cfp->Remark && *cfp->Remark) {
       Desc = (PSZ)PlugSubAlloc(g, memp, strlen(cfp->Remark) + 1);
@@ -410,13 +411,15 @@ int COLDEF::Define(PGLOBAL g, void *memp, PCOLINFO cfp, int poff)
       strcpy(Decode, cfp->Datefmt);
       } // endif Datefmt
 
+    } // endif special
+
   if (cfp->Fieldfmt) {
     Fmt = (PSZ)PlugSubAlloc(g, memp, strlen(cfp->Fieldfmt) + 1);
     strcpy(Fmt, cfp->Fieldfmt);
     } // endif Fieldfmt
 
   Flags = cfp->Flags;
-  return (Flags & U_VIRTUAL) ? 0 : Long;
+  return (Flags & (U_VIRTUAL|U_SPECIAL)) ? 0 : Long;
   } // end of Define
 
 /* ------------------------- End of RelDef --------------------------- */

storage/connect/reldef.h

@@ -175,6 +175,7 @@ class DllExport COLDEF : public COLCRT { /* Column description block
   friend class MYCAT;
   friend class COLBLK;
   friend class DBFFAM;
+  friend class TDBASE;
  public:
   COLDEF(void);                // Constructor
 

storage/connect/table.cpp

@@ -307,15 +307,17 @@ PCOL TDBASE::ColDB(PGLOBAL g, PSZ name, int num)
       /*****************************************************************/
       if (cp)
         colp = cp;
-      else
+      else if (!(cdp->Flags & U_SPECIAL))
         colp = MakeCol(g, cdp, cprec, i);
+      else if (Mode == MODE_READ)
+        colp = InsertSpcBlk(g, cdp);
 
       if (trace)
         htrc("colp=%p\n", colp);
       
       if (name || num)
         break;
-      else if (colp)
+      else if (colp && !colp->IsSpecial())
         cprec = colp;
 
       } // endif Name
@@ -339,30 +341,35 @@ PCOL TDBASE::InsertSpecialColumn(PGLOBAL g, PCOL colp)
 /***********************************************************************/
 /*  Make a special COLBLK to insert in a table.                        */
 /***********************************************************************/
-PCOL TDBASE::InsertSpcBlk(PGLOBAL g, PCOLUMN cp)
+PCOL TDBASE::InsertSpcBlk(PGLOBAL g, PCOLDEF cdp)
   {
-  char *name = (char*)cp->GetName();
+//char *name = cdp->GetName();
+  char   *name = cdp->GetFmt();
+  PCOLUMN cp;
   PCOL    colp;
 
-  if (!strcmp(name, "FILEID")) {
-//    !strcmp(name, "SERVID")) {
+  cp= new(g) COLUMN(cdp->GetName());
+  cp->SetTo_Table(To_Table);
+
+  if (!stricmp(name, "FILEID") ||
+      !stricmp(name, "SERVID")) {
     if (!To_Def || !(To_Def->GetPseudo() & 2)) {
       sprintf(g->Message, MSG(BAD_SPEC_COLUMN));
       return NULL;
       } // endif Pseudo
 
-//  if (!strcmp(name, "FILEID"))
+    if (!stricmp(name, "FILEID"))
       colp = new(g) FIDBLK(cp);
-//  else
-//    colp = new(g) SIDBLK(cp);
+    else
+      colp = new(g) SIDBLK(cp);
 
-  } else if (!strcmp(name, "TABID")) {
+  } else if (!stricmp(name, "TABID")) {
     colp = new(g) TIDBLK(cp);
-//} else if (!strcmp(name, "CONID")) {
+//} else if (!stricmp(name, "CONID")) {
 //  colp = new(g) CIDBLK(cp);
-  } else if (!strcmp(name, "ROWID")) {
+  } else if (!stricmp(name, "ROWID")) {
     colp = new(g) RIDBLK(cp, false);
-  } else if (!strcmp(name, "ROWNUM")) {
+  } else if (!stricmp(name, "ROWNUM")) {
       colp = new(g) RIDBLK(cp, true);
   } else {
     sprintf(g->Message, MSG(BAD_SPECIAL_COL), name);

storage/connect/tabmysql.cpp

@@ -194,6 +194,7 @@ bool MYSQLDEF::ParseURL(PGLOBAL g, char *url)
     if (trace)
       htrc("server: %s  Tabname: %s", url, Tabname);
 
+    Server = url;
     return GetServerInfo(g, url);
   } else {
     // URL, parse it
@@ -216,8 +217,10 @@ bool MYSQLDEF::ParseURL(PGLOBAL g, char *url)
     if (!(Hostname = strchr(Username, '@'))) {
       strcpy(g->Message, "No host specified in URL");
       return true;
-    } else
+    } else {
       *Hostname++ = 0;                   // End Username
+      Server = Hostname;
+    } // endif Hostname
 
     if ((Password = strchr(Username, ':'))) {
       *Password++ = 0;                   // End username
@@ -308,6 +311,7 @@ bool MYSQLDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff)
       Username = Cat->GetStringCatInfo(g, "User", "*");
       Password = Cat->GetStringCatInfo(g, "Password", NULL);
       Portnumber = Cat->GetIntCatInfo("Port", GetDefaultPort());
+      Server = Hostname;
     } else if (ParseURL(g, url))
       return TRUE;
 
@@ -327,6 +331,7 @@ bool MYSQLDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff)
       Username = Cat->GetStringCatInfo(g, "User", "*");
       Password = Cat->GetStringCatInfo(g, "Password", NULL);
       Portnumber = Cat->GetIntCatInfo("Port", GetDefaultPort());
+      Server = Hostname;
     } else {
       char *locdb = Database;
 
@@ -365,13 +370,14 @@ PTDB MYSQLDEF::GetTable(PGLOBAL g, MODE m)
 TDBMYSQL::TDBMYSQL(PMYDEF tdp) : TDBASE(tdp)
   {
   if (tdp) {
-    Host = tdp->GetHostname();
-    Database = tdp->GetDatabase();
-    Tabname = tdp->GetTabname();
-    Srcdef = tdp->GetSrcdef();
-    User = tdp->GetUsername();
-    Pwd = tdp->GetPassword();
-    Port = tdp->GetPortnumber();
+    Host = tdp->Hostname;
+    Database = tdp->Database;
+    Tabname = tdp->Tabname;
+    Srcdef = tdp->Srcdef;
+    User = tdp->Username;
+    Pwd = tdp->Password;
+    Server = tdp->Server;
+    Port = tdp->Portnumber;
     Isview = tdp->Isview;
     Prep = tdp->Bind;
     Delayed = tdp->Delayed;
@@ -382,6 +388,7 @@ TDBMYSQL::TDBMYSQL(PMYDEF tdp) : TDBASE(tdp)
     Srcdef = NULL;
     User = NULL;
     Pwd = NULL;
+    Server = NULL;
     Port = 0;
     Isview = FALSE;
     Prep = FALSE;
@@ -473,10 +480,11 @@ bool TDBMYSQL::MakeSelect(PGLOBAL g)
 
   if (Columns) {
     for (colp = Columns; colp; colp = colp->GetNext())
-      if (colp->IsSpecial()) {
-        strcpy(g->Message, MSG(NO_SPEC_COL));
-        return TRUE;
-      } else {
+      if (!colp->IsSpecial()) {
+//      if (colp->IsSpecial()) {
+//        strcpy(g->Message, MSG(NO_SPEC_COL));
+//        return TRUE;
+//      } else {
         if (b)
           strcat(Query, ", ");
         else
@@ -519,10 +527,11 @@ bool TDBMYSQL::MakeInsert(PGLOBAL g)
     return FALSE;        // already done
 
   for (colp = Columns; colp; colp = colp->GetNext())
-    if (colp->IsSpecial()) {
-      strcpy(g->Message, MSG(NO_SPEC_COL));
-      return TRUE;
-    } else {
+    if (!colp->IsSpecial()) {
+//    if (colp->IsSpecial()) {
+//      strcpy(g->Message, MSG(NO_SPEC_COL));
+//      return TRUE;
+//    } else {
       len += (strlen(colp->GetName()) + 4);
       ((PMYCOL)colp)->Rank = Nparm++;
     } // endif colp

storage/connect/tabmysql.h

@@ -49,6 +49,7 @@ class MYSQLDEF : public TABDEF           {/* Logical table description */
   PSZ     Srcdef;             /* The source table SQL definition       */
   PSZ     Username;           /* User logon name                       */
   PSZ     Password;           /* Password logon info                   */
+  PSZ     Server;             /* PServerID                             */
   int     Portnumber;         /* MySQL port number (0 = default)       */
   bool    Isview;             /* TRUE if this table is a MySQL view    */
   bool    Bind;               /* Use prepared statement on insert      */
@@ -77,6 +78,7 @@ class TDBMYSQL : public TDBASE {
   virtual void ResetDB(void) {N = 0;}
   virtual int  RowNumber(PGLOBAL g, bool b = FALSE);
   virtual bool IsView(void) {return Isview;}
+  virtual PSZ  GetServer(void) {return Server;}
           void SetDatabase(LPCSTR db) {Database = (char*)db;}
 
   // Database routines
@@ -110,6 +112,7 @@ class TDBMYSQL : public TDBASE {
   char       *Database;       // Database to be used by server
   char       *Tabname;        // External table name
   char       *Srcdef;         // The source table SQL definition
+  char       *Server;         // The server ID
   char       *Query;          // Points to SQL query
   char       *Qbuf;           // Used for not prepared insert
   bool        Fetched;        // True when fetch was done

storage/connect/tabodbc.h

@@ -75,6 +75,7 @@ class TDBODBC : public TDBASE {
   virtual void SetFile(PGLOBAL g, PSZ fn);
   virtual void ResetSize(void);
   virtual int  GetAffectedRows(void) {return AftRows;}
+  virtual PSZ  GetServer(void) {return "ODBC";}
 
   // Database routines
   virtual PCOL MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n);

storage/connect/tabtbl.cpp

@@ -380,7 +380,8 @@ int TDBTBL::GetMaxSize(PGLOBAL g)
 void TDBTBL::ResetDB(void)
   {
   for (PCOL colp = Columns; colp; colp = colp->GetNext())
-    if (colp->GetAmType() == TYPE_AM_TABID)
+    if (colp->GetAmType() == TYPE_AM_TABID ||
+        colp->GetAmType() == TYPE_AM_SRVID)
       colp->COLBLK::Reset();
 
   for (PTABLE tabp = Tablist; tabp; tabp = tabp->GetNext())
@@ -492,7 +493,8 @@ int TDBTBL::ReadDB(PGLOBAL g)
 
         // Check and initialize the subtable columns
         for (PCOL cp = Columns; cp; cp = cp->GetNext())
-          if (cp->GetAmType() == TYPE_AM_TABID)
+          if (cp->GetAmType() == TYPE_AM_TABID ||
+              cp->GetAmType() == TYPE_AM_SRVID)
             cp->COLBLK::Reset();
           else if (((PPRXCOL)cp)->Init(g) && !Accept)
             return RC_FX;

storage/connect/tabutil.h

@@ -70,6 +70,7 @@ class DllExport TDBPRX : public TDBASE {
   virtual int   GetRecpos(void) {return Tdbp->GetRecpos();}
 	virtual void  ResetDB(void) {Tdbp->ResetDB();}
 	virtual int   RowNumber(PGLOBAL g, bool b = FALSE);
+  virtual PSZ   GetServer(void) {return (Tdbp) ? Tdbp->GetServer() : "?";}
 
   // Database routines
 	virtual PCOL  MakeCol(PGLOBAL g, PCOLDEF cdp, PCOL cprec, int n);

storage/connect/value.h

@@ -83,6 +83,7 @@ class DllExport VALUE : public BLOCK {
   virtual void   SetPrec(int prec) {Prec = prec;}
           bool   IsNull(void) {return Null;}
           void   SetNull(bool b) {Null = b;}
+          bool   GetNullable(void) {return Nullable;}
           void   SetNullable(bool b) {Nullable = b;}
           int    GetType(void) {return Type;}
           int    GetClen(void) {return Clen;}

storage/connect/xindex.cpp

@@ -2797,7 +2797,7 @@ bool KXYCOL::Init(PGLOBAL g, PCOL colp, int n, bool sm, int kln)
   if (Asc)
     IsSorted = colp->GetOpt() < 0;
 
-//MayHaveNulls = colp->HasNulls();
+//SetNulls(colp->IsNullable()); for when null columns will be indexable
   return false;
   } // end of Init
 
@@ -2956,6 +2956,11 @@ void KXYCOL::InitBinFind(void *vp)
 void KXYCOL::FillValue(PVAL valp)
   {
   valp->SetValue_pvblk(Kblp, Val_K);
+
+  // Set null when applicable (NIY)
+//if (valp->GetNullable())
+//  valp->SetNull(valp->IsZero());
+
   } // end of FillValue
 
 /***********************************************************************/

storage/connect/xtable.h

@@ -113,6 +113,7 @@ class DllExport TDB: public TBX {     // Table Descriptor Block.
                   {fprintf(f, "%s AM(%d)\n",  m, GetAmType());}
   virtual void   Print(PGLOBAL g, FILE *f, uint n);
   virtual void   Print(PGLOBAL g, char *ps, uint z);
+  virtual PSZ    GetServer(void) = 0;
 
   // Database pure virtual routines
   virtual PCOL   ColDB(PGLOBAL g, PSZ name, int num) = 0;
@@ -192,13 +193,14 @@ class DllExport TDBASE : public TDB {
   virtual void   ResetSize(void) {MaxSize = -1;}
   virtual void   RestoreNrec(void) {}
   virtual int    ResetTableOpt(PGLOBAL g, bool dox);
+  virtual PSZ    GetServer(void) {return "Current";}
 
   // Database routines
   virtual PCOL ColDB(PGLOBAL g, PSZ name, int num);
   virtual PCOL MakeCol(PGLOBAL, PCOLDEF, PCOL, int)
                       {assert(false); return NULL;}
   virtual PCOL InsertSpecialColumn(PGLOBAL g, PCOL colp);
-  virtual PCOL InsertSpcBlk(PGLOBAL g, PCOLUMN cp);
+  virtual PCOL InsertSpcBlk(PGLOBAL g, PCOLDEF cdp);
   virtual void MarkDB(PGLOBAL g, PTDB tdb2);
 
  protected: