--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Framework/MySQL/MySQLResult.cpp	Wed Jul 04 08:16:29 2018 +0200
@@ -0,0 +1,109 @@
+/**
+ * Orthanc - A Lightweight, RESTful DICOM Store
+ * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
+ * Department, University Hospital of Liege, Belgium
+ * Copyright (C) 2017-2018 Osimis S.A., Belgium
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Affero General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Affero General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+
+#include "MySQLResult.h"
+
+#include <Core/Logging.h>
+#include <Core/OrthancException.h>
+
+#include <mysql/errmsg.h>
+#include <mysqld_error.h>
+
+namespace OrthancDatabases
+{
+  void MySQLResult::Step()
+  {
+    int code = mysql_stmt_fetch(statement_.GetObject());
+
+    if (code == 1)
+    {
+      unsigned int error = mysql_errno(database_.GetObject());
+      if (error == 0)
+      {
+        // This case can occur if the SQL request is not a SELECT
+        done_ = true;
+      }
+      else if (error == CR_SERVER_GONE_ERROR ||
+               error == CR_SERVER_LOST ||
+               error == ER_QUERY_INTERRUPTED)
+      {
+        database_.LogError();
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_DatabaseUnavailable);
+      }
+      else
+      {
+        database_.LogError();
+        throw Orthanc::OrthancException(Orthanc::ErrorCode_Database);
+      }
+    }
+    else
+    {
+      done_ = (code != 0 &&
+               code != MYSQL_DATA_TRUNCATED);  // Occurs if mysql_stmt_fetch_column() must be called
+
+      FetchFields();
+    }
+  }
+
+
+  IValue* MySQLResult::FetchField(size_t index)
+  {
+    return statement_.FetchResultField(index);
+  }
+  
+  
+  MySQLResult::MySQLResult(MySQLDatabase& db,
+                           MySQLStatement& statement) :
+    database_(db),
+    statement_(statement)
+  {
+    // !!! https://dev.mysql.com/doc/refman/5.7/en/mysql-stmt-fetch.html
+    // https://gist.github.com/hoterran/6365915
+    // https://github.com/hholzgra/connector-c-examples/blob/master/mysql_stmt_bind_result.c
+
+    SetFieldsCount(statement_.GetResultFieldsCount());
+
+    Step();
+  }
+    
+
+  MySQLResult::~MySQLResult()
+  {
+    // Reset the statement for further use
+    if (mysql_stmt_reset(statement_.GetObject()) != 0)
+    {
+      LOG(ERROR) << "Cannot reset the statement, expect an error";
+    }
+  }
+    
+
+  void MySQLResult::Next()
+  {
+    if (IsDone())
+    {
+      throw Orthanc::OrthancException(Orthanc::ErrorCode_BadSequenceOfCalls);
+    }
+    else
+    {
+      Step();
+    }
+  }
+}