- Implement random access to ODBC tables

modified:
  storage/connect/odbconn.cpp
  storage/connect/odbconn.h

- Fix get proper length of ODBC DECIMAL column in discovery
modified:
  storage/connect/ha_connect.cc
  storage/connect/mysql-test/connect/r/odbc_oracle.result

- Implement random access to JSON tables
modified:
  storage/connect/tabjson.cpp
  storage/connect/tabjson.h

- Fix MDEV-7636
modified:
  storage/connect/tabutil.cpp

storage/connect/ha_connect.cc

@@ -5462,7 +5462,9 @@ static int connect_assisted_discovery(handlerton *hton, THD* thd,
             case TYPE_DOUBLE:
               // Some data sources do not count dec in length (prec)
               prec += (dec + 2);        // To be safe
+              break;
             case TYPE_DECIM:
+              prec= len;
               break;
             default:
               dec= 0;

storage/connect/mysql-test/connect/r/odbc_oracle.result

@@ -126,7 +126,7 @@ TABNAME='T1';
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `A` decimal(38,0) DEFAULT NULL,
+  `A` decimal(40,0) DEFAULT NULL,
   `B` double(40,0) DEFAULT NULL
 ) ENGINE=CONNECT DEFAULT CHARSET=latin1 CONNECTION='DSN=ConnectEngineOracle;UID=mtr;PWD=mtr' `TABLE_TYPE`='ODBC' `TABNAME`='T1'
 SELECT * FROM t1 ORDER BY A;
@@ -138,7 +138,7 @@ CREATE TABLE t2 AS SELECT * FROM t1;
 SHOW CREATE TABLE t2;
 Table	Create Table
 t2	CREATE TABLE `t2` (
-  `A` decimal(38,0) DEFAULT NULL,
+  `A` decimal(40,0) DEFAULT NULL,
   `B` double(40,0) DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 SELECT * FROM t2;
@@ -162,7 +162,7 @@ TABNAME='MTR.T1';
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `A` decimal(38,0) DEFAULT NULL,
+  `A` decimal(40,0) DEFAULT NULL,
   `B` double(40,0) DEFAULT NULL
 ) ENGINE=CONNECT DEFAULT CHARSET=latin1 CONNECTION='DSN=ConnectEngineOracle;UID=mtr;PWD=mtr' `TABLE_TYPE`='ODBC' `TABNAME`='MTR.T1'
 SELECT * FROM t1;
@@ -178,7 +178,7 @@ TABNAME='MTR.V1';
 SHOW CREATE TABLE t1;
 Table	Create Table
 t1	CREATE TABLE `t1` (
-  `A` decimal(38,0) DEFAULT NULL,
+  `A` decimal(40,0) DEFAULT NULL,
   `B` double(40,0) DEFAULT NULL
 ) ENGINE=CONNECT DEFAULT CHARSET=latin1 CONNECTION='DSN=ConnectEngineOracle;UID=mtr;PWD=mtr' `TABLE_TYPE`='ODBC' `TABNAME`='MTR.V1'
 SELECT * FROM t1;
@@ -190,7 +190,7 @@ CREATE TABLE t2 AS SELECT * FROM t1;
 SHOW CREATE TABLE t2;
 Table	Create Table
 t2	CREATE TABLE `t2` (
-  `A` decimal(38,0) DEFAULT NULL,
+  `A` decimal(40,0) DEFAULT NULL,
   `B` double(40,0) DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 SELECT * FROM t2;

storage/connect/odbconn.cpp

@@ -102,7 +102,12 @@ static int GetSQLCType(int type)
     case TYPE_BIGINT: tp = SQL_C_SBIGINT;   break;
     case TYPE_DOUBLE: tp = SQL_C_DOUBLE;    break;
     case TYPE_TINY :  tp = SQL_C_TINYINT;   break;
+//#if (ODBCVER >= 0x0300)
+//    case TYPE_DECIM:  tp = SQL_C_NUMERIC;   break;  (CRASH!!!)
+//#else
     case TYPE_DECIM:  tp = SQL_C_CHAR;      break;
+//#endif
+
     } // endswitch type
 
   return tp;
@@ -923,13 +928,13 @@ ODBConn::ODBConn(PGLOBAL g, TDBODBC *tdbp)
   m_RowsetSize = (DWORD)((tdbp) ? tdbp->Rows : 10);
   m_Catver = (tdbp) ? tdbp->Catver : 0;
   m_Rows = 0;
+  m_Fetch = 0;
   m_Connect = NULL;
   m_User = NULL;
   m_Pwd = NULL;
   m_Updatable = true;
   m_Transact = false;
   m_Scrollable = (tdbp) ? tdbp->Scrollable : false;
-  m_First = true;
   m_Full = false;
   m_UseCnc = false;
   m_IDQuoteChar[0] = '"';
@@ -984,7 +989,7 @@ void ODBConn::ThrowDBX(RETCODE rc, PSZ msg, HSTMT hstmt)
 
 void ODBConn::ThrowDBX(PSZ msg)
   {
-  DBX* xp = new(m_G) DBX(0, msg);
+  DBX* xp = new(m_G) DBX(0, "Error");
 
   xp->m_ErrMsg[0] = msg;
   throw xp;
@@ -1099,8 +1104,7 @@ int ODBConn::Open(PSZ ConnectString, POPARM sop, DWORD options)
 //  VerifyConnect();         Deprecated
     GetConnectInfo();
   } catch(DBX *xp) {
-//    strcpy(g->Message, xp->m_ErrMsg[0]);
-    strcpy(g->Message, xp->GetErrorMessage(0));
+    sprintf(g->Message, "%s: %s", xp->m_Msg, xp->GetErrorMessage(0));
     Close();
 //  Free();
     return -1;
@@ -1356,7 +1360,7 @@ int ODBConn::ExecDirectSQL(char *sql, ODBCCOL *tocols)
       rc = SQLFreeStmt(m_hstmt, SQL_CLOSE);
 
       if (!Check(rc))
-        ThrowDBX(rc, "SQLFreeStmt");
+        ThrowDBX(rc, "SQLFreeStmt", m_hstmt);
 
       m_hstmt = NULL;
       } // endif m_hstmt
@@ -1371,7 +1375,7 @@ int ODBConn::ExecDirectSQL(char *sql, ODBCCOL *tocols)
                           (void*)SQL_SCROLLABLE, 0);
 
       if (!Check(rc))
-        ThrowDBX(rc, "SQLSetStmtAttr");
+        ThrowDBX(rc, "Scrollable", hstmt);
 
       } // endif m_Scrollable
 
@@ -1458,7 +1462,7 @@ int ODBConn::ExecDirectSQL(char *sql, ODBCCOL *tocols)
       for (int i = 0; i < MAX_NUM_OF_MSG && x->m_ErrMsg[i]; i++)
         htrc(x->m_ErrMsg[i]);
 
-    strcpy(m_G->Message, x->GetErrorMessage(0));
+    sprintf(m_G->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
 
     if (b)
       SQLCancel(hstmt);
@@ -1521,7 +1525,7 @@ int ODBConn::GetResultSize(char *sql, ODBCCOL *colp)
 /***********************************************************************/
 /*  Fetch next row.                                                    */
 /***********************************************************************/
-int ODBConn::Fetch()
+int ODBConn::Fetch(int pos)
   {
   ASSERT(m_hstmt);
   int      irc;
@@ -1531,7 +1535,9 @@ int ODBConn::Fetch()
 
   try {
 //  do {
-    if (m_RowsetSize) {
+    if (pos) {
+      rc = SQLExtendedFetch(m_hstmt, SQL_FETCH_ABSOLUTE, pos, &crow, NULL);
+    } else if (m_RowsetSize) {
       rc = SQLExtendedFetch(m_hstmt, SQL_FETCH_NEXT, 1, &crow, NULL);
     } else {
       rc = SQLFetch(m_hstmt);
@@ -1544,29 +1550,22 @@ int ODBConn::Fetch()
                      m_hstmt, m_RowsetSize, rc);
 
     if (!Check(rc))
-      ThrowDBX(rc, "Fetch", m_hstmt);
-
-    irc = (rc == SQL_NO_DATA_FOUND) ? 0 : (int)crow;
-
-    if (m_First) {
-      // First fetch. Check whether the full table was read
-      if ((m_Full = irc < (signed)m_RowsetSize)) {
-        m_Tdb->Memory = 0;     // Not needed anymore
-        m_Rows = irc;          // Table size
-        } // endif m_Full
+      ThrowDBX(rc, "Fetching", m_hstmt);
 
-      m_First = false;
-      } // endif m_First
+    if (rc == SQL_NO_DATA_FOUND) {
+      m_Full = (m_Fetch == 1);
+      irc = 0;
+    } else
+      irc = (int)crow;
 
-    if (m_Tdb->Memory == 1)
+    m_Fetch++;
     m_Rows += irc;
-
   } catch(DBX *x) {
     if (trace)
       for (int i = 0; i < MAX_NUM_OF_MSG && x->m_ErrMsg[i]; i++)
         htrc(x->m_ErrMsg[i]);
 
-    strcpy(g->Message, x->GetErrorMessage(0));
+    sprintf(g->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     irc = -1;
   } // end try/catch
 
@@ -1602,7 +1601,7 @@ int ODBConn::PrepareSQL(char *sql)
         for (int i = 0; i < MAX_NUM_OF_MSG && x->m_ErrMsg[i]; i++)
           htrc(x->m_ErrMsg[i]);
 
-      strcpy(g->Message, x->GetErrorMessage(0));
+    sprintf(g->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     } // end try/catch
 
     } // endif Mode
@@ -1648,7 +1647,7 @@ int ODBConn::PrepareSQL(char *sql)
       for (int i = 0; i < MAX_NUM_OF_MSG && x->m_ErrMsg[i]; i++)
         htrc(x->m_ErrMsg[i]);
 
-    strcpy(g->Message, x->GetErrorMessage(0));
+    sprintf(g->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
 
     if (b)
       SQLCancel(hstmt);
@@ -1700,7 +1699,7 @@ int ODBConn::ExecuteSQL(void)
     } // endif ncol
 
   } catch(DBX *x) {
-    strcpy(m_G->Message, x->GetErrorMessage(0));
+    sprintf(m_G->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     SQLCancel(m_hstmt);
     rc = SQLFreeStmt(m_hstmt, SQL_DROP);
     m_hstmt = NULL;
@@ -1737,7 +1736,7 @@ bool ODBConn::BindParam(ODBCCOL *colp)
       ThrowDBX(rc, "SQLDescribeParam", m_hstmt);
 
   } catch(DBX *x) {
-    strcpy(m_G->Message, x->GetErrorMessage(0));
+    sprintf(m_G->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     colsize = colp->GetPrecision();
     sqlt = GetSQLType(buftype);
     dec = IsTypeChar(buftype) ? 0 : colp->GetScale();
@@ -1845,7 +1844,7 @@ bool ODBConn::ExecSQLcommand(char *sql)
 			for (int i = 0; i < MAX_NUM_OF_MSG && x->m_ErrMsg[i]; i++)
 				htrc(x->m_ErrMsg[i]);
 
-    sprintf(g->Message, "Remote: %s", x->GetErrorMessage(0));
+    sprintf(g->Message, "Remote %s: %s", x->m_Msg, x->GetErrorMessage(0));
 
     if (b)
       SQLCancel(hstmt);
@@ -1930,7 +1929,7 @@ PQRYRES ODBConn::GetMetaData(PGLOBAL g, char *dsn, char *src)
       } // endfor i
 
   } catch(DBX *x) {
-    strcpy(g->Message, x->GetErrorMessage(0));
+    sprintf(g->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     goto err;
   } // end try/catch
 
@@ -1981,7 +1980,7 @@ PQRYRES ODBConn::GetMetaData(PGLOBAL g, char *dsn, char *src)
       } // endfor i
 
   } catch(DBX *x) {
-    strcpy(g->Message, x->GetErrorMessage(0));
+    sprintf(g->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     qrp = NULL;
   } // end try/catch
 
@@ -2033,7 +2032,7 @@ bool ODBConn::GetDataSources(PQRYRES qrp)
       } // endfor i
 
   } catch(DBX *x) {
-    strcpy(m_G->Message, x->GetErrorMessage(0));
+    sprintf(m_G->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     rv = true;
   } // end try/catch
 
@@ -2084,7 +2083,7 @@ bool ODBConn::GetDrivers(PQRYRES qrp)
       } // endfor n
 
   } catch(DBX *x) {
-    strcpy(m_G->Message, x->GetErrorMessage(0));
+    sprintf(m_G->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     rv = true;
   } // end try/catch
 
@@ -2402,7 +2401,7 @@ int ODBConn::GetCatInfo(CATPARM *cap)
       for (int i = 0; i < MAX_NUM_OF_MSG && x->m_ErrMsg[i]; i++)
         htrc(x->m_ErrMsg[i]);
 
-    strcpy(g->Message, x->GetErrorMessage(0));
+    sprintf(g->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
     irc = -1;
   } // end try/catch
 
@@ -2506,7 +2505,7 @@ int ODBConn::Rewind(char *sql, ODBCCOL *tocols)
 
       rbuf = (int)crow;
     } catch(DBX *x) {
-      strcpy(m_G->Message, x->GetErrorMessage(0));
+      sprintf(m_G->Message, "%s: %s", x->m_Msg, x->GetErrorMessage(0));
       rbuf = -1;
     } // end try/catch
 

storage/connect/odbconn.h

@@ -141,7 +141,7 @@ class ODBConn : public BLOCK {
 //void SetUserPwd(PSZ pwd) {m_Pwd = pwd;}
   int  GetResultSize(char *sql, ODBCCOL *colp);
   int  ExecDirectSQL(char *sql, ODBCCOL *tocols);
-  int  Fetch(void);
+  int  Fetch(int pos = 0);
   int  PrepareSQL(char *sql);
   int  ExecuteSQL(void);
   bool BindParam(ODBCCOL *colp);
@@ -192,10 +192,10 @@ class ODBConn : public BLOCK {
   PSZ      m_Pwd;
   int      m_Catver;
   int      m_Rows;
+  int      m_Fetch;
   bool     m_Updatable;
   bool     m_Transact;
   bool     m_Scrollable;
   bool     m_UseCnc;
-  bool     m_First;
   bool     m_Full;
   }; // end of ODBConn class definition

storage/connect/tabjson.cpp

@@ -1290,6 +1290,51 @@ int TDBJSON::MakeIndex(PGLOBAL g, PIXDEF pxdf, bool add)
 
   } // end of MakeIndex 
 
+/***********************************************************************/
+/*  Return the position in the table.                                  */
+/***********************************************************************/
+int TDBJSON::GetRecpos(void)
+  {
+#if 0
+  union {
+    uint Rpos;
+    BYTE Spos[4];
+    };
+
+  Rpos = htonl(Fpos);
+  Spos[0] = (BYTE)NextSame;
+  return Rpos;
+#endif // 0
+  return Fpos;
+  } // end of GetRecpos
+
+/***********************************************************************/
+/*  Set the position in the table.                                  */
+/***********************************************************************/
+bool TDBJSON::SetRecpos(PGLOBAL g, int recpos)
+  {
+#if 0
+  union {
+    uint Rpos;
+    BYTE Spos[4];
+    };
+
+  Rpos = recpos;
+  NextSame = Spos[0];
+  Spos[0] = 0;
+  Fpos = (signed)ntohl(Rpos);
+
+//if (Fpos != (signed)ntohl(Rpos)) {
+//  Fpos = ntohl(Rpos);
+//  same = false;
+//} else
+//  same = true;
+#endif // 0
+
+  Fpos = recpos - 1;
+  return false;
+  } // end of SetRecpos
+
 /***********************************************************************/
 /*  JSON Access Method opening routine.                                */
 /***********************************************************************/

storage/connect/tabjson.h

@@ -174,10 +174,9 @@ class TDBJSON : public TDBJSN {
   virtual int  Cardinality(PGLOBAL g);
   virtual int  GetMaxSize(PGLOBAL g);
   virtual void ResetSize(void);
-	virtual int  GetRecpos(void) {return Fpos;}
   virtual int  GetProgCur(void) {return N;}
-  virtual bool SetRecpos(PGLOBAL g, int recpos)
-                {Fpos = recpos - 1; return false;}
+	virtual int  GetRecpos(void);
+  virtual bool SetRecpos(PGLOBAL g, int recpos);
   virtual bool OpenDB(PGLOBAL g);
   virtual int  ReadDB(PGLOBAL g);
   virtual bool PrepareWriting(PGLOBAL g) {return false;}

storage/connect/tabodbc.cpp

@@ -135,9 +135,16 @@ bool ODBCDEF::DefineAM(PGLOBAL g, LPCSTR am, int poff)
 //Options = ODBConn::noOdbcDialog | ODBConn::useCursorLib;
   Cto= GetIntCatInfo("ConnectTimeout", DEFAULT_LOGIN_TIMEOUT);
   Qto= GetIntCatInfo("QueryTimeout", DEFAULT_QUERY_TIMEOUT);
-  Scrollable = GetBoolCatInfo("Scrollable", false);
+
+  if ((Scrollable = GetBoolCatInfo("Scrollable", false)) && !Elemt)
+    Elemt = 1;     // Cannot merge SQLFetch and SQLExtendedFetch
+
   UseCnc = GetBoolCatInfo("UseDSN", false);
-  Memory = GetBoolCatInfo("Memory", false);
+
+  // Memory was Boolean, it is now integer
+  if (!(Memory = GetIntCatInfo("Memory", 0)))
+    Memory = GetBoolCatInfo("Memory", false) ? 1 : 0;
+
   Pseudo = 2;    // FILID is Ok but not ROWID
   return false;
   } // end of DefineAM
@@ -206,7 +213,7 @@ TDBODBC::TDBODBC(PODEF tdp) : TDBASE(tdp)
     Quoted = MY_MAX(0, tdp->GetQuoted());
     Rows = tdp->GetElemt();
     Catver = tdp->Catver;
-    Memory = (tdp->Memory) ? 1 : 0;
+    Memory = tdp->Memory;
     Scrollable = tdp->Scrollable;
     Ops.UseCnc = tdp->UseCnc;
   } else {
@@ -238,11 +245,13 @@ TDBODBC::TDBODBC(PODEF tdp) : TDBASE(tdp)
   DBQ = NULL;
   Qrp = NULL;
   Fpos = 0;
+  Curpos = 0;
   AftRows = 0;
   CurNum = 0;
   Rbuf = 0;
   BufSize = 0;
   Nparm = 0;
+  Placed = false;
   } // end of TDBODBC standard constructor
 
 TDBODBC::TDBODBC(PTDBODBC tdbp) : TDBASE(tdbp)
@@ -267,15 +276,15 @@ TDBODBC::TDBODBC(PTDBODBC tdbp) : TDBASE(tdbp)
   Options = tdbp->Options;
   Quoted = tdbp->Quoted;
   Rows = tdbp->Rows;
-  Fpos = tdbp->Fpos;
-  AftRows = tdbp->AftRows;
-//Tpos = tdbp->Tpos;
-//Spos = tdbp->Spos;
-  CurNum = tdbp->CurNum;
-  Rbuf = tdbp->Rbuf;
+  Fpos = 0;
+  Curpos = 0;
+  AftRows = 0;
+  CurNum = 0;
+  Rbuf = 0;
   BufSize = tdbp->BufSize;
   Nparm = tdbp->Nparm;
   Qrp = tdbp->Qrp;
+  Placed = false;
   } // end of TDBODBC copy constructor
 
 // Method
@@ -811,10 +820,12 @@ bool TDBODBC::OpenDB(PGLOBAL g)
         return true;
         } // endif Rewind
 
-      } // endif Memory
+    } else
+      Rbuf = Qrp->Nblin;
 
     CurNum = 0;
     Fpos = 0;
+    Curpos = 1;
     return false;
     } // endif use
 
@@ -841,6 +852,37 @@ bool TDBODBC::OpenDB(PGLOBAL g)
   /*  Make the command and allocate whatever is used for getting results.                   */
   /*********************************************************************/
   if (Mode == MODE_READ || Mode == MODE_READX) {
+    if (Memory > 1 && !Srcdef) {
+      char *Sql;
+      int   n;
+
+      if ((Sql = MakeSQL(g, true))) {
+        // Allocate a Count(*) column
+        Cnp = new(g) ODBCCOL;
+        Cnp->InitValue(g);
+
+        if ((n = Ocp->GetResultSize(Sql, Cnp)) < 0) {
+          strcpy(g->Message, "Cannot get result size");
+          return true;
+          } // endif n
+
+        Ocp->m_Rows = n;
+
+        if ((Qrp = Ocp->AllocateResult(g)))
+          Memory = 2;            // Must be filled
+        else {
+          strcpy(g->Message, "Memory allocation failed");
+          return true;
+          } // endif n
+
+        Ocp->m_Rows = 0;
+      } else {
+        strcpy(g->Message, "MakeSQL failed");
+        return true;
+      } // endif Sql
+
+      } // endif Memory
+
     if ((Query = MakeSQL(g, false))) {
       for (PODBCCOL colp = (PODBCCOL)Columns; colp;
                     colp = (PODBCCOL)colp->GetNext())
@@ -882,9 +924,40 @@ bool TDBODBC::OpenDB(PGLOBAL g)
 /***********************************************************************/
 int TDBODBC::GetRecpos(void)
   {
-  return Fpos;              // To be really implemented
+  return Fpos;
   } // end of GetRecpos
 
+/***********************************************************************/
+/*  SetRecpos: set the position of next read record.                   */
+/***********************************************************************/
+bool TDBODBC::SetRecpos(PGLOBAL g, int recpos)
+  {
+  if (Ocp->m_Full) {
+    Fpos = 0;
+    CurNum = recpos - 1;
+  } else if (Memory == 3) {
+    Fpos = recpos;
+    CurNum = -1;
+  } else if (Scrollable) {
+    // Is new position in the current row set?
+    if (recpos >= Curpos && recpos < Curpos + Rbuf) {
+      CurNum = recpos - Curpos;
+      Fpos = 0;
+    } else {
+      Fpos = recpos;
+      CurNum = 0;
+    } // endif recpos
+
+  } else {
+    strcpy(g->Message, "This action requires a scrollable cursor");
+    return true;
+  } // endif's
+
+  // Indicate the table position was externally set
+  Placed = true;
+  return false;
+  } // end of SetRecpos
+
 /***********************************************************************/
 /*  VRDNDOS: Data Base read routine for odbc access method.            */
 /***********************************************************************/
@@ -924,9 +997,17 @@ int TDBODBC::ReadDB(PGLOBAL g)
   /*  Now start the reading process.                                   */
   /*  Here is the place to fetch the line(s).                          */
   /*********************************************************************/
+  if (Placed) {
+    if (Fpos && CurNum >= 0)
+      Rbuf = Ocp->Fetch((Curpos = Fpos));
+
+    rc = (Rbuf > 0) ? RC_OK : (Rbuf == 0) ? RC_EF : RC_FX;
+    Placed = false;
+  } else {
     if (Memory != 3) {
       if (++CurNum >= Rbuf) {
         Rbuf = Ocp->Fetch();
+        Curpos = Fpos + 1;
         CurNum = 0;
         } // endif CurNum
 
@@ -938,9 +1019,11 @@ int TDBODBC::ReadDB(PGLOBAL g)
       if (Memory == 2)
         Qrp->Nblin++;
 
-    Fpos++;                // Used for memory
+      Fpos++;                // Used for memory and pos
       } // endif rc
 
+  } // endif Placed
+
   if (trace > 1)
     htrc(" Read: Rbuf=%d rc=%d\n", Rbuf, rc);
 

storage/connect/tabodbc.h

@@ -64,8 +64,8 @@ class DllExport ODBCDEF : public TABDEF { /* Logical table description */
   int     Quoted;             /* Identifier quoting level              */
   int     Maxerr;             /* Maxerr for an Exec table              */
   int     Maxres;             /* Maxres for a catalog table            */
+  int     Memory;             /* Put result set in memory              */
   bool    Scrollable;         /* Use scrollable cursor                 */
-  bool    Memory;             /* Put result set in memory              */
   bool    Xsrc;               /* Execution type                        */
   bool    UseCnc;             /* Use SQLConnect (!SQLDriverConnect)    */
   }; // end of ODBCDEF
@@ -93,6 +93,7 @@ class TDBODBC : public TDBASE {
   // Methods
   virtual PTDB CopyOne(PTABS t);
   virtual int  GetRecpos(void);
+  virtual bool SetRecpos(PGLOBAL g, int recpos);
   virtual PSZ  GetFile(PGLOBAL g);
   virtual void SetFile(PGLOBAL g, PSZ fn);
   virtual void ResetSize(void);
@@ -148,6 +149,7 @@ class TDBODBC : public TDBASE {
   int      Qto;               // Query timeout
   int      Quoted;            // The identifier quoting level
   int      Fpos;              // Position of last read record
+  int      Curpos;            // Cursor position of last fetch
   int      AftRows;           // The number of affected rows
   int      Rows;              // Rowset size
   int      Catver;            // Catalog ODBC version
@@ -157,6 +159,7 @@ class TDBODBC : public TDBASE {
   int      Nparm;             // The number of statement parameters
   int      Memory;            // 0: No 1: Alloc 2: Put 3: Get
   bool     Scrollable;        // Use scrollable cursor
+  bool     Placed;            // True for position reading
   bool     UseCnc;            // Use SQLConnect (!SQLDriverConnect)
   PQRYRES  Qrp;               // Points to storage result
   }; // end of class TDBODBC

storage/connect/tabutil.cpp

 /************* Tabutil cpp Declares Source Code File (.CPP) ************/
-/*  Name: TABUTIL.CPP   Version 1.0                                    */
+/*  Name: TABUTIL.CPP   Version 1.1                                    */
 /*                                                                     */
-/*  (C) Copyright to the author Olivier BERTRAND          2013         */
+/*  (C) Copyright to the author Olivier BERTRAND          2013 - 2015  */
 /*                                                                     */
 /*  Utility function used by the PROXY, XCOL, OCCUR, and TBL tables.   */
 /***********************************************************************/
@@ -9,7 +9,8 @@
 /***********************************************************************/
 /*  Include relevant section of system dependant header files.         */
 /***********************************************************************/
-#include "my_global.h"
+#define MYSQL_SERVER 1
+#include <my_global.h>
 #include "sql_class.h"
 #include "table.h"
 #include "field.h"
@@ -108,6 +109,9 @@ TABLE_SHARE *GetTableShare(PGLOBAL g, THD *thd, const char *db,
     } // endif is_view
 
   } else {
+    if (thd->is_error())
+      thd->clear_error();  // Avoid stopping info commands
+
     sprintf(g->Message, "Error %d opening share\n", s->error);
     free_table_share(s);
     return NULL;