Query_result_send Class Reference

#include <query_result.h>

Inheritance diagram for Query_result_send:

Public Member Functions
	Query_result_send ()
bool	send_result_set_metadata (THD *thd, const mem_root_deque< Item * > &list, uint flags) override
bool	send_data (THD *thd, const mem_root_deque< Item * > &items) override
bool	send_eof (THD *thd) override
bool	check_supports_cursor () const override
	Check if this query result set supports cursors. More...
void	abort_result_set (THD *thd) override
void	cleanup () override
	Cleanup after this execution. More...
bool	use_protocol_adapter () const override
	An alternative implementation may provide an optimized protocol adapter for this object. More...
Public Member Functions inherited from Query_result
	Query_result ()
virtual	~Query_result ()=default
virtual bool	needs_file_privilege () const
virtual bool	change_query_result (THD *, Query_result *)
	Change wrapped Query_result. More...
virtual bool	need_explain_interceptor () const
virtual bool	prepare (THD *, const mem_root_deque< Item * > &, Query_expression *u)
	Perform preparation specific to the query expression or DML statement. More...
virtual bool	start_execution (THD *)
	Prepare for execution of the query expression or DML statement. More...
virtual bool	create_table_for_query_block (THD *)
	Create table, only needed to support CREATE TABLE ... SELECT. More...
virtual uint	field_count (const mem_root_deque< Item * > &fields) const
virtual bool	reset ()
	Cleanup after one execution of the unit, to be ready for a next execution inside the same statement. More...
virtual bool	use_protocol_wrapper () const
virtual void	set_limit (ha_rows)
	Only overridden (and non-empty) for Query_result_union, q.v. More...
virtual Server_side_cursor *	cursor () const

Private Attributes
bool	is_result_set_started
	True if we have sent result set metadata to the client. More...

Additional Inherited Members
Public Attributes inherited from Query_result
ha_rows	estimated_rowcount
	Number of records estimated in this result. More...
double	estimated_cost
	Cost to execute the subquery which produces this result. More...
Protected Attributes inherited from Query_result
Query_expression *	unit

Constructor & Destructor Documentation

Query_result_send()

Query_result_send::Query_result_send ( )

inline

Member Function Documentation

abort_result_set()

void Query_result_send::abort_result_set ( THD *  thd )

overridevirtual

Reimplemented from Query_result.

check_supports_cursor()

bool Query_result_send::check_supports_cursor ( ) const

inlineoverridevirtual

Check if this query result set supports cursors.

Returns

false if success, true if error

Reimplemented from Query_result.

cleanup()

void Query_result_send::cleanup ( )

inlineoverridevirtual

Cleanup after this execution.

Completes the execution and resets object before next execution of a prepared statement/stored procedure.

Reimplemented from Query_result.

send_data()

bool Query_result_send::send_data ( THD *  thd, const mem_root_deque< Item * > &  items  )

overridevirtual

Implements Query_result.

Reimplemented in anonymous_namespace{sql_prepare.cc}::Query_fetch_protocol_binary.

send_eof()

bool Query_result_send::send_eof ( THD *  thd )

overridevirtual

Implements Query_result.

Reimplemented in anonymous_namespace{sql_prepare.cc}::Query_fetch_protocol_binary.

send_result_set_metadata()

bool Query_result_send::send_result_set_metadata ( THD *  thd, const mem_root_deque< Item * > &  list, uint  flags  )

overridevirtual

Implements Query_result.

Reimplemented in anonymous_namespace{sql_prepare.cc}::Query_fetch_protocol_binary.

use_protocol_adapter()

bool Query_result_send::use_protocol_adapter ( ) const

inlineoverridevirtual

An alternative implementation may provide an optimized protocol adapter for this object.

Reimplemented from Query_result.

Reimplemented in anonymous_namespace{sql_prepare.cc}::Query_fetch_protocol_binary.

Member Data Documentation

is_result_set_started

bool Query_result_send::is_result_set_started

private

True if we have sent result set metadata to the client.

In this case the client always expects us to end the result set with an eof or error packet

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

• sql/query_result.h
• sql/query_result.cc