MySQL 8.0.32
Source Code Documentation
Query_result_to_file Class Reference

#include <query_result.h>

Inheritance diagram for Query_result_to_file:
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Public Member Functions

 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
 
void cleanup () override
 Cleanup after this execution. More...
 
- 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 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 bool send_data (THD *thd, const mem_root_deque< Item * > &items)=0
 
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_cursorcursor () const
 

Protected Attributes

sql_exchangeexchange
 
File file
 
IO_CACHE cache
 
ha_rows row_count
 
char path [FN_REFLEN]
 
- Protected Attributes inherited from Query_result
Query_expressionunit
 

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...
 

Constructor & Destructor Documentation

◆ Query_result_to_file()

Query_result_to_file::Query_result_to_file ( sql_exchange ex)
inlineexplicit

◆ ~Query_result_to_file()

Query_result_to_file::~Query_result_to_file ( )
inlineoverride

Member Function Documentation

◆ check_supports_cursor()

bool Query_result_to_file::check_supports_cursor ( ) const
overridevirtual

Check if this query result set supports cursors.

Returns
false if success, true if error

Reimplemented from Query_result.

◆ cleanup()

void Query_result_to_file::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.

Reimplemented in Query_result_export.

◆ needs_file_privilege()

bool Query_result_to_file::needs_file_privilege ( ) const
inlineoverridevirtual

Reimplemented from Query_result.

◆ send_eof()

bool Query_result_to_file::send_eof ( THD thd)
overridevirtual

Implements Query_result.

Member Data Documentation

◆ cache

IO_CACHE Query_result_to_file::cache
protected

◆ exchange

sql_exchange* Query_result_to_file::exchange
protected

◆ file

File Query_result_to_file::file
protected

◆ path

char Query_result_to_file::path[FN_REFLEN]
protected

◆ row_count

ha_rows Query_result_to_file::row_count
protected

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