Materialized_cursor Class Reference

Inheritance diagram for Materialized_cursor:

Collaboration diagram for Materialized_cursor:

Public Member Functions
	Materialized_cursor (select_result *result, TABLE *table)
int	send_result_set_metadata (THD *thd, List< Item > &send_result_set_metadata)
virtual bool	is_open () const
virtual int	open (JOIN *join __attribute__((unused)))
virtual void	fetch (ulong num_rows)
virtual void	close ()
Public Member Functions inherited from Server_side_cursor
	Server_side_cursor (MEM_ROOT *mem_root_arg, select_result *result_arg)
virtual int	open (JOIN *top_level_join)=0

Additional Inherited Members
Static Public Member Functions inherited from Server_side_cursor
static void	operator delete (void *ptr, size_t size)
Protected Attributes inherited from Server_side_cursor
select_result *	result

Detailed Description

Materialized_cursor – an insensitive materialized server-side cursor. The result set of this cursor is saved in a temporary table at open. The cursor itself is simply an interface for the handler of the temporary table.

Definition at line 34 of file sql_cursor.cc.

Member Function Documentation

void Materialized_cursor::fetch ( ulong  num_rows )

virtual

Fetch up to the given number of rows from a materialized cursor.

Precondition: the cursor is open.

If the cursor points after the last row, the fetch will automatically close the cursor and not send any data (except the 'EOF' packet with SERVER_STATUS_LAST_ROW_SENT). This is an extra round trip and probably should be improved to return SERVER_STATUS_LAST_ROW_SENT along with the last row.

Implements Server_side_cursor.

Definition at line 318 of file sql_cursor.cc.

Here is the call graph for this function:

int Materialized_cursor::send_result_set_metadata	(	THD *	thd,
		List< Item > &	send_result_set_metadata
	)

Preserve the original metadata to be sent to the client. Initiate sending of the original metadata to the client (call Protocol::send_result_set_metadata()).

Parameters

thd	Thread identifier.
send_result_set_metadata	List of fields that would be sent.

Definition at line 226 of file sql_cursor.cc.

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The documentation for this class was generated from the following file:

• sql/sql_cursor.cc