mariadb/storage/innobase/include/handler0alter.h

/*****************************************************************************

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Copyright (c) 2019, MariaDB Corporation.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free Software
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

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this program; if not, write to the Free Software Foundation, Inc.,
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*****************************************************************************/

/**************************************************//**
@file include/handler0alter.h
Smart ALTER TABLE
*******************************************************/

#include "rem0types.h"

/*************************************************************//**
Copies an InnoDB record to table->record[0]. */
void
innobase_rec_to_mysql(
/*==================*/
	struct TABLE*		table,	/*!< in/out: MySQL table */
	const rec_t*		rec,	/*!< in: record */
	const dict_index_t*	index,	/*!< in: index */
	const rec_offs*		offsets)/*!< in: rec_get_offsets(
					rec, index, ...) */
	MY_ATTRIBUTE((nonnull));

/*************************************************************//**
Copies an InnoDB index entry to table->record[0]. */
void
innobase_fields_to_mysql(
/*=====================*/
	struct TABLE*		table,	/*!< in/out: MySQL table */
	const dict_index_t*	index,	/*!< in: InnoDB index */
	const dfield_t*		fields)	/*!< in: InnoDB index fields */
	MY_ATTRIBUTE((nonnull));

/*************************************************************//**
Copies an InnoDB row to table->record[0]. */
void
innobase_row_to_mysql(
/*==================*/
	struct TABLE*		table,	/*!< in/out: MySQL table */
	const dict_table_t*	itab,	/*!< in: InnoDB table */
	const dtuple_t*		row)	/*!< in: InnoDB row */
	MY_ATTRIBUTE((nonnull));

/** Generate the next autoinc based on a snapshot of the session
auto_increment_increment and auto_increment_offset variables. */
struct ib_sequence_t {

	/**
	@param thd the session
	@param start_value the lower bound
	@param max_value the upper bound (inclusive) */
	ib_sequence_t(THD* thd, ulonglong start_value, ulonglong max_value);

	/** Postfix increment
	@return the value to insert */
	ulonglong operator++(int) UNIV_NOTHROW;

	/** Check if the autoinc "sequence" is exhausted.
	@return true if the sequence is exhausted */
	bool eof() const UNIV_NOTHROW
	{
		return(m_eof);
	}

	/**
	@return the next value in the sequence */
	ulonglong last() const UNIV_NOTHROW
	{
		ut_ad(m_next_value > 0);

		return(m_next_value);
	}

	/** @return maximum column value
	@retval	0	if not adding AUTO_INCREMENT column */
	ulonglong max_value() const { return m_max_value; }

private:
	/** Maximum value if adding an AUTO_INCREMENT column, else 0 */
	ulonglong	m_max_value;

	/** Value of auto_increment_increment */
	ulong		m_increment;

	/** Value of auto_increment_offset */
	ulong		m_offset;

	/** Next value in the sequence */
	ulonglong	m_next_value;

	/** true if no more values left in the sequence */
	bool		m_eof;
};