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MySQL 5.1: Server_side_cursor Class Reference

Server_side_cursor Class Reference

#include <sql_cursor.h>

Inheritance diagram for Server_side_cursor:

[legend]Collaboration diagram for Server_side_cursor:

[legend]List of all members.


Public Member Functions
	Server_side_cursor (MEM_ROOT mem_root_arg, select_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	~Server_side_cursor ()
Static Public Member Functions
static void	operator delete (void *ptr, size_t size)
Protected Attributes
select_result *	result

Detailed Description

Definition at line 36 of file sql_cursor.h.

Constructor & Destructor Documentation

Server_side_cursor::Server_side_cursor	(	MEM_ROOT *	mem_root_arg,
		select_result *	result_arg
	)			`[inline]`

Definition at line 42 of file sql_cursor.h.

00043     :Query_arena(mem_root_arg, INITIALIZED), result(result_arg)
00044   {}

Server_side_cursor::~Server_side_cursor ( ) [virtual]

Definition at line 244 of file sql_cursor.cc.

00245 {
00246 }

Member Function Documentation

virtual void Server_side_cursor::close ( ) [pure virtual]

Implemented in Sensitive_cursor, and Materialized_cursor.

virtual void Server_side_cursor::fetch ( ulong num_rows ) [pure virtual]

Implemented in Sensitive_cursor, and Materialized_cursor.

Referenced by sp_cursor::fetch(), and mysql_stmt_fetch().

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virtual bool Server_side_cursor::is_open ( ) const [pure virtual]

Implemented in Sensitive_cursor, and Materialized_cursor.

Referenced by sp_cursor::fetch(), and mysql_stmt_fetch().

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virtual int Server_side_cursor::open ( JOIN * top_level_join ) [pure virtual]

Implemented in Sensitive_cursor.

void Server_side_cursor::operator delete	(	void *	ptr,
		size_t	size
	)			`[static]`

Reimplemented from Sql_alloc.

Definition at line 249 of file sql_cursor.cc.

References DBUG_ENTER, DBUG_VOID_RETURN, free_root(), MYF, and TRASH.

00250 {
00251   Server_side_cursor *cursor= (Server_side_cursor*) ptr;
00252   MEM_ROOT own_root= *cursor->mem_root;
00253 
00254   DBUG_ENTER("Server_side_cursor::operator delete");
00255   TRASH(ptr, size);
00256   /*
00257     If this cursor has never been opened mem_root is empty. Otherwise
00258     mem_root points to the memory the cursor object was allocated in.
00259     In this case it's important to call free_root last, and free a copy
00260     instead of *mem_root to avoid writing into freed memory.
00261   */
00262   free_root(&own_root, MYF(0));
00263   DBUG_VOID_RETURN;
00264 }