- Do not throw an error on empty ODBC CATFUNC (MDEV-5455)

modified:
  storage/connect/ha_connect.cc
  storage/connect/odbconn.cpp

storage/connect/ha_connect.cc

@@ -4407,7 +4407,7 @@ static int connect_assisted_discovery(handlerton *hton, THD* thd,
     if (!qrp) {
       my_message(ER_UNKNOWN_ERROR, g->Message, MYF(0));
       return HA_ERR_INTERNAL_ERROR;
-      } // endif qrp
+      } // endif !qrp
 
     if (fnc != FNC_NO || src || ttp == TAB_PIVOT) {
       // Catalog like table
@@ -4429,7 +4429,18 @@ static int connect_assisted_discovery(handlerton *hton, THD* thd,
 
       } // endfor crp
 
-    } else              // Not a catalog table
+    } else {            
+      // Not a catalog table
+      if (!qrp->Nblin) {
+        if (tab)
+          sprintf(g->Message, "Cannot get columns from %s", tab);
+        else
+          strcpy(g->Message, "Fail to retrieve columns");
+
+        my_message(ER_UNKNOWN_ERROR, g->Message, MYF(0));
+        return HA_ERR_INTERNAL_ERROR;
+        } // endif !nblin
+
       for (i= 0; !rc && i < qrp->Nblin; i++) {
         typ= len= prec= dec= 0;
         tm= NOT_NULL_FLAG;
@@ -4522,6 +4533,8 @@ static int connect_assisted_discovery(handlerton *hton, THD* thd,
           rc= HA_ERR_OUT_OF_MEM;
         } // endfor i
 
+    } // endif fnc
+
     if (!rc)
       rc= init_table_share(thd, table_s, create_info, &sql);
 //    rc= init_table_share(thd, table_s, create_info, dsn, &sql);

storage/connect/odbconn.cpp

@@ -2287,6 +2287,7 @@ int ODBConn::GetCatInfo(CATPARM *cap)
 
       } // endfor i
 
+#if 0
     if ((crow = i) && (rc == SQL_NO_DATA || rc == SQL_SUCCESS_WITH_INFO))
       rc = SQL_SUCCESS;
 
@@ -2303,6 +2304,15 @@ int ODBConn::GetCatInfo(CATPARM *cap)
 
     } else
       ThrowDBX(rc, fnc, hstmt);
+#endif // 0
+
+    if (!rc || rc == SQL_NO_DATA || rc == SQL_SUCCESS_WITH_INFO) {
+      if ((rc = SQLFetch(hstmt)) != SQL_NO_DATA_FOUND)
+        qrp->Truncated = true; 
+
+      crow = i;
+    } else
+      ThrowDBX(rc, fnc, hstmt);
 
     irc = (int)crow;
   } catch(DBX *x) {