Materialized_cursor Class Reference

Inheritance diagram for Materialized_cursor:

List of all members.

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 ()

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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.

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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.

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.

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

• sql_cursor.cc