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+/* Copyright (c) 2005, 2011, Oracle and/or its affiliates. All rights reserved.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+
+ 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
+
+#ifndef _sql_cursor_h_
+#define _sql_cursor_h_
+
+#ifdef USE_PRAGMA_INTERFACE
+#pragma interface /* gcc class interface */
+#endif
+
+#include "sql_class.h" /* Query_arena */
+
+class JOIN;
+
+/**
+ @file
+
+ Declarations for implementation of server side cursors. Only
+ read-only non-scrollable cursors are currently implemented.
+*/
+
+/**
+ Server_side_cursor -- an interface for materialized
+ implementation of cursors. All cursors are self-contained
+ (created in their own memory root). For that reason they must
+ be deleted only using a pointer to Server_side_cursor, not to
+ its base class.
+*/
+
+class Server_side_cursor: protected Query_arena, public Sql_alloc
+{
+protected:
+ /** Row destination used for fetch */
+ select_result *result;
+public:
+ Server_side_cursor(MEM_ROOT *mem_root_arg, select_result *result_arg)
+ :Query_arena(mem_root_arg, STMT_INITIALIZED), result(result_arg)
+ {}
+
+ virtual bool is_open() const= 0;
+
+ virtual int open(JOIN *top_level_join)= 0;
+ virtual void fetch(ulong num_rows)= 0;
+ virtual void close()= 0;
+ virtual bool export_structure(THD *thd, Row_definition_list *defs)
+ {
+ DBUG_ASSERT(0);
+ return true;
+ }
+ virtual ~Server_side_cursor();
+
+ static void operator delete(void *ptr, size_t size);
+ static void operator delete(void *, MEM_ROOT *){}
+};
+
+
+int mysql_open_cursor(THD *thd, select_result *result,
+ Server_side_cursor **res);
+
+#endif /* _sql_cusor_h_ */