ib_sequence_t Struct Reference

#include <handler0alter.h>

Public Member Functions
	ib_sequence_t (THD *thd, ulonglong start_value, ulonglong max_value)
ulonglong	operator++ (int) UNIV_NOTHROW
bool	eof () const UNIV_NOTHROW
ulonglong	last () const UNIV_NOTHROW

Data Fields
const ulonglong	m_max_value
ulong	m_increment
ulong	m_offset
ulonglong	m_next_value
bool	m_eof

Detailed Description

Generate the next autoinc based on a snapshot of the session

auto_increment_increment and auto_increment_offset variables.

Constructor & Destructor Documentation

ib_sequence_t::ib_sequence_t	(	THD *	thd,
		ulonglong	start_value,
		ulonglong	max_value
	)

Parameters

thd	- the session
start_value	- the lower bound
max_value	- the upper bound (inclusive)

Member Function Documentation

bool ib_sequence_t::eof ( ) const

inline

Check if the autoinc "sequence" is exhausted.

Returns

true if the sequence is exhausted

ulonglong ib_sequence_t::last ( ) const

inline

Returns

the next value in the sequence

ulonglong ib_sequence_t::operator++

(

int

)

Postfix increment

Returns

the value to insert

Field Documentation

bool ib_sequence_t::m_eof

true if no more values left in the sequence

ulong ib_sequence_t::m_increment

Value of auto_increment_increment

const ulonglong ib_sequence_t::m_max_value

Maximum calumn value if adding an AUTOINC column else 0. Once

we reach the end of the sequence it will be set to ~0.

ulonglong ib_sequence_t::m_next_value

Next value in the sequence

ulong ib_sequence_t::m_offset

Value of auto_increment_offset

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

• include/handler0alter.h