qep_row::column< T > Struct Template Reference

#include <opt_explain_format.h>

List of all members.

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

---

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_JOIN_TAB context node of the intermediate tree.

---

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

• opt_explain_format.h