qep_row::column< T > Struct Template Reference

A wrapper for numeric table properties. More...

#include <opt_explain_format.h>

Public Member Functions
	column ()
bool	is_empty () const
void	cleanup ()
void	set (T value_arg)
T	get () const

Public Attributes
T	value

Private Attributes
bool	nil
	true if the column contains NULL More...

Detailed Description

template<typename T>
struct qep_row::column< T >

A wrapper for numeric table properties.

For traditional EXPLAIN this structure contains a value of one cell of the output row (excluding textual column values - see mem_root_str, and "Extra" column - see the col_extra list).

For hierarchical EXPLAIN this structure contains a numeric property value for a single CTX_TABLE/CTX_QEP_TAB context node of the intermediate tree.

Constructor & Destructor Documentation

column()

template<typename T >

qep_row::column< T >::column ( )

inline

Member Function Documentation

cleanup()

template<typename T >

void qep_row::column< T >::cleanup ( )

inline

get()

template<typename T >

T qep_row::column< T >::get ( ) const

inline

is_empty()

template<typename T >

bool qep_row::column< T >::is_empty ( ) const

inline

set()

template<typename T >

void qep_row::column< T >::set ( T  value_arg )

inline

Member Data Documentation

nil

template<typename T >

bool qep_row::column< T >::nil

private

true if the column contains NULL

value

template<typename T >

T qep_row::column< T >::value

---

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

• sql/opt_explain_format.h