MySQL 8.0.32
Source Code Documentation
Query_result_subquery Class Referenceabstract

Base class for result from a subquery. More...

#include <query_result.h>

Inheritance diagram for Query_result_subquery:
[legend]

Public Member Functions

 Query_result_subquery (Item_subselect *item_arg)
 
bool send_data (THD *thd, const mem_root_deque< Item * > &items) override=0
 
bool send_eof (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 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 bool check_supports_cursor () const
 Check if this query result set supports cursors. 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 cleanup ()
 Cleanup after this execution. 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

Item_subselectitem
 
- 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...
 

Detailed Description

Base class for result from a subquery.

Constructor & Destructor Documentation

◆ Query_result_subquery()

Query_result_subquery::Query_result_subquery ( Item_subselect item_arg)
inlineexplicit

Member Function Documentation

◆ send_data()

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

◆ send_eof()

bool Query_result_subquery::send_eof ( THD )
inlineoverridevirtual

Implements Query_result.

Member Data Documentation

◆ item

Item_subselect* Query_result_subquery::item
protected

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