Query_result_export Class Reference

#include <query_result.h>

Inheritance diagram for Query_result_export:

Public Member Functions
	Query_result_export (sql_exchange *ex)
bool	prepare (THD *thd, const mem_root_deque< Item * > &list, Query_expression *u) override
	Perform preparation specific to the query expression or DML statement. More...
bool	start_execution (THD *thd) override
	Prepare for execution of the query expression or DML statement. More...
bool	send_data (THD *thd, const mem_root_deque< Item * > &items) override
void	cleanup () override
	Cleanup after this execution. More...
Public Member Functions inherited from Query_result_to_file
	Query_result_to_file (sql_exchange *ex)
	~Query_result_to_file () override
bool	needs_file_privilege () const override
bool	check_supports_cursor () const override
	Check if this query result set supports cursors. More...
bool	send_eof (THD *thd) override
Public Member Functions inherited from Query_result_interceptor
	Query_result_interceptor ()
uint	field_count (const mem_root_deque< Item * > &) const override
bool	send_result_set_metadata (THD *, const mem_root_deque< Item * > &, uint) override
bool	is_interceptor () const final
	Checks if this Query_result intercepts and transforms the result set. More...
Public Member Functions inherited from Query_result
	Query_result ()
virtual	~Query_result ()=default
virtual bool	change_query_result (THD *, Query_result *)
	Change wrapped Query_result. More...
virtual bool	need_explain_interceptor () const
virtual bool	create_table_for_query_block (THD *)
	Create table, only needed to support CREATE TABLE ... SELECT. More...
virtual void	abort_result_set (THD *)
virtual bool	reset ()
	Cleanup after one execution of the unit, to be ready for a next execution inside the same statement. More...
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
size_t	field_term_length
int	field_sep_char
int	escape_char
int	line_sep_char
int	field_term_char
bool	is_ambiguous_field_sep
bool	is_ambiguous_field_term
bool	is_unsafe_field_sep
bool	fixed_row_size
const CHARSET_INFO *	write_cs

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_to_file
sql_exchange *	exchange
File	file
IO_CACHE	cache
ha_rows	row_count
char	path [FN_REFLEN]
Protected Attributes inherited from Query_result
Query_expression *	unit

Constructor & Destructor Documentation

Query_result_export()

Query_result_export::Query_result_export ( sql_exchange *  ex )

inlineexplicit

Member Function Documentation

cleanup()

void Query_result_export::cleanup ( )

overridevirtual

Cleanup after this execution.

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

Reimplemented from Query_result_to_file.

prepare()

bool Query_result_export::prepare ( THD *  , const mem_root_deque< Item * > &  , Query_expression *  u  )

overridevirtual

Perform preparation specific to the query expression or DML statement.

Returns

false if success, true if error

Reimplemented from Query_result.

send_data()

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

overridevirtual

Implements Query_result.

start_execution()

bool Query_result_export::start_execution ( THD *  )

overridevirtual

Prepare for execution of the query expression or DML statement.

Generally, this will have an implementation only for outer-most Query_block objects, such as data change statements (for preparation of the target table(s)) or dump statements (for preparation of target file).

Returns

false if success, true if error

Reimplemented from Query_result.

Member Data Documentation

escape_char

int Query_result_export::escape_char

private

field_sep_char

int Query_result_export::field_sep_char

private

field_term_char

int Query_result_export::field_term_char

private

field_term_length

size_t Query_result_export::field_term_length

private

fixed_row_size

bool Query_result_export::fixed_row_size

private

is_ambiguous_field_sep

bool Query_result_export::is_ambiguous_field_sep

private

is_ambiguous_field_term

bool Query_result_export::is_ambiguous_field_term

private

is_unsafe_field_sep

bool Query_result_export::is_unsafe_field_sep

private

line_sep_char

int Query_result_export::line_sep_char

private

write_cs

const CHARSET_INFO* Query_result_export::write_cs

private

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

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