MySQL  8.0.27
Source Code Documentation
Query_result_do Class Referencefinal

#include <sql_do.h>

Inheritance diagram for Query_result_do:
Query_result

Public Member Functions

 Query_result_do ()
 
bool send_result_set_metadata (THD *, const mem_root_deque< Item * > &, uint) override
 
bool send_data (THD *thd, const mem_root_deque< Item * > &items) override
 
bool send_eof (THD *thd) override
 
bool check_simple_query_block () const override
 Check if this query returns a result set and therefore is allowed in cursors and set an error message if it is not the case. More...
 
void abort_result_set (THD *) override
 
void cleanup (THD *) override
 Cleanup after this execution. 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 optimize ()
 Optimize the result processing of a query expression, applicable to data change operation (not simple select queries). 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 void send_error (THD *, uint errcode, const char *err)
 
virtual bool reset ()
 Cleanup after one execution of the unit, to be ready for a next execution inside the same statement. More...
 
void begin_dataset ()
 
virtual const ha_rowsrow_count () const
 
virtual bool is_interceptor () const
 Checks if this Query_result intercepts and transforms the result set. More...
 
virtual bool immediate_update (TABLE_LIST *t[[maybe_unused]]) const
 If this Query_result performs modifications to tables: tells if it modifies the given table's row as it's read (a.k.a. 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_expressionunit
 

Constructor & Destructor Documentation

◆ Query_result_do()

Query_result_do::Query_result_do ( )
inline

Member Function Documentation

◆ abort_result_set()

void Query_result_do::abort_result_set ( THD )
inlineoverridevirtual

Reimplemented from Query_result.

◆ check_simple_query_block()

bool Query_result_do::check_simple_query_block ( ) const
inlineoverridevirtual

Check if this query returns a result set and therefore is allowed in cursors and set an error message if it is not the case.

Return values
falsesuccess
trueerror, an error message is set

Reimplemented from Query_result.

◆ cleanup()

void Query_result_do::cleanup ( THD )
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_do::send_data ( THD thd,
const mem_root_deque< Item * > &  items 
)
overridevirtual

Implements Query_result.

◆ send_eof()

bool Query_result_do::send_eof ( THD thd)
overridevirtual

Implements Query_result.

◆ send_result_set_metadata()

bool Query_result_do::send_result_set_metadata ( THD ,
const mem_root_deque< Item * > &  ,
uint   
)
inlineoverridevirtual

Implements Query_result.


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