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

Public Attributes
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.

Definition at line 70 of file handler0alter.h.

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

Definition at line 85 of file handler0alter.h.

ulonglong ib_sequence_t::last ( ) const

inline

Returns

the next value in the sequence

Definition at line 92 of file handler0alter.h.

UNIV_INTERN ulonglong ib_sequence_t::operator++

(

int

)

Postfix increment

Returns

the value to insert

Postfix increment

Returns

the next value to insert

Definition at line 5835 of file handler0alter.cc.

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Member Data Documentation

bool ib_sequence_t::m_eof

true if no more values left in the sequence

Definition at line 113 of file handler0alter.h.

ulong ib_sequence_t::m_increment

Value of auto_increment_increment

Definition at line 104 of file handler0alter.h.

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.

Definition at line 101 of file handler0alter.h.

ulonglong ib_sequence_t::m_next_value

Next value in the sequence

Definition at line 110 of file handler0alter.h.

ulong ib_sequence_t::m_offset

Value of auto_increment_offset

Definition at line 107 of file handler0alter.h.

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

• storage/innobase/include/handler0alter.h
• storage/innobase/handler/handler0alter.cc