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

/**************************************************//**
@file include/row0log.h
Modification log for online index creation and online table rebuild

Created 2011-05-26 Marko Makela
*******************************************************/

#pragma once

#include "que0types.h"
#include "mtr0types.h"
#include "row0types.h"
#include "rem0types.h"
#include "dict0dict.h"
#include "trx0types.h"
#include "trx0undo.h"

class ut_stage_alter_t;

extern Atomic_counter<ulint> onlineddl_rowlog_rows;
extern ulint onlineddl_rowlog_pct_used;
extern ulint onlineddl_pct_progress;

/******************************************************//**
Allocate the row log for an index and flag the index
for online creation.
@retval true if success, false if not */
bool
row_log_allocate(
/*=============*/
	const trx_t*	trx,	/*!< in: the ALTER TABLE transaction */
	dict_index_t*	index,	/*!< in/out: index */
	dict_table_t*	table,	/*!< in/out: new table being rebuilt,
				or NULL when creating a secondary index */
	bool		same_pk,/*!< in: whether the definition of the
				PRIMARY KEY has remained the same */
	const dtuple_t*	defaults,
				/*!< in: default values of
				added, changed columns, or NULL */
	const ulint*	col_map,/*!< in: mapping of old column
				numbers to new ones, or NULL if !table */
	const char*	path,	/*!< in: where to create temporary file */
	const TABLE*	old_table,	/*!< in:table definition before alter */
	bool		allow_not_null) /*!< in: allow null to non-null
					conversion */
	MY_ATTRIBUTE((nonnull(1), warn_unused_result));

/******************************************************//**
Free the row log for an index that was being created online. */
void
row_log_free(
/*=========*/
	row_log_t*	log)	/*!< in,own: row log */
	MY_ATTRIBUTE((nonnull));

/******************************************************//**
Free the row log for an index on which online creation was aborted. */
inline void row_log_abort_sec(dict_index_t *index)
{
  ut_ad(index->lock.have_u_or_x());
  ut_ad(!index->is_clust());
  dict_index_set_online_status(index, ONLINE_INDEX_ABORTED);
  row_log_free(index->online_log);
  index->online_log= nullptr;
}

/******************************************************//**
Gets the error status of the online index rebuild log.
@return DB_SUCCESS or error code */
dberr_t
row_log_table_get_error(
/*====================*/
	const dict_index_t*	index)	/*!< in: clustered index of a table
					that is being rebuilt online */
	MY_ATTRIBUTE((nonnull, warn_unused_result));

/******************************************************//**
Logs a delete operation to a table that is being rebuilt.
This will be merged in row_log_table_apply_delete(). */
void
row_log_table_delete(
/*=================*/
	const rec_t*	rec,	/*!< in: clustered index leaf page record,
				page X-latched */
	dict_index_t*	index,	/*!< in/out: clustered index, S-latched
				or X-latched */
	const rec_offs*	offsets,/*!< in: rec_get_offsets(rec,index) */
	const byte*	sys)	/*!< in: DB_TRX_ID,DB_ROLL_PTR that should
				be logged, or NULL to use those in rec */
	ATTRIBUTE_COLD __attribute__((nonnull(1,2,3)));

/******************************************************//**
Logs an update operation to a table that is being rebuilt.
This will be merged in row_log_table_apply_update(). */
void
row_log_table_update(
/*=================*/
	const rec_t*	rec,	/*!< in: clustered index leaf page record,
				page X-latched */
	dict_index_t*	index,	/*!< in/out: clustered index, S-latched
				or X-latched */
	const rec_offs*	offsets,/*!< in: rec_get_offsets(rec,index) */
	const dtuple_t*	old_pk);/*!< in: row_log_table_get_pk()
				before the update */

/******************************************************//**
Constructs the old PRIMARY KEY and DB_TRX_ID,DB_ROLL_PTR
of a table that is being rebuilt.
@return tuple of PRIMARY KEY,DB_TRX_ID,DB_ROLL_PTR in the rebuilt table,
or NULL if the PRIMARY KEY definition does not change */
const dtuple_t*
row_log_table_get_pk(
/*=================*/
	const rec_t*	rec,	/*!< in: clustered index leaf page record,
				page X-latched */
	dict_index_t*	index,	/*!< in/out: clustered index, S-latched
				or X-latched */
	const rec_offs*	offsets,/*!< in: rec_get_offsets(rec,index),
				or NULL */
	byte*		sys,	/*!< out: DB_TRX_ID,DB_ROLL_PTR for
				row_log_table_delete(), or NULL */
	mem_heap_t**	heap)	/*!< in/out: memory heap where allocated */
	ATTRIBUTE_COLD __attribute__((nonnull(1,2,5), warn_unused_result));

/******************************************************//**
Logs an insert to a table that is being rebuilt.
This will be merged in row_log_table_apply_insert(). */
void
row_log_table_insert(
/*=================*/
	const rec_t*	rec,	/*!< in: clustered index leaf page record,
				page X-latched */
	dict_index_t*	index,	/*!< in/out: clustered index, S-latched
				or X-latched */
	const rec_offs*	offsets);/*!< in: rec_get_offsets(rec,index) */

/** Apply the row_log_table log to a table upon completing rebuild.
@param[in]	thr		query graph
@param[in]	old_table	old table
@param[in,out]	table		MySQL table (for reporting duplicates)
@param[in,out]	stage		performance schema accounting object, used by
ALTER TABLE. stage->begin_phase_log_table() will be called initially and then
stage->inc() will be called for each block of log that is applied.
@param[in]	new_table	Altered table
@return DB_SUCCESS, or error code on failure */
dberr_t
row_log_table_apply(
	que_thr_t*		thr,
	dict_table_t*		old_table,
	struct TABLE*		table,
	ut_stage_alter_t*	stage,
	dict_table_t*		new_table)
	MY_ATTRIBUTE((warn_unused_result));

/******************************************************//**
Get the latest transaction ID that has invoked row_log_online_op()
during online creation.
@return latest transaction ID, or 0 if nothing was logged */
trx_id_t
row_log_get_max_trx(
/*================*/
	dict_index_t*	index)	/*!< in: index, must be locked */
	MY_ATTRIBUTE((nonnull, warn_unused_result));

/** Apply the row log to the index upon completing index creation.
@param[in,out]	trx	transaction (for checking if the operation was
interrupted)
@param[in,out]	index	secondary index
@param[in,out]	table	MySQL table (for reporting duplicates)
@param[in,out]	stage	performance schema accounting object, used by
ALTER TABLE. stage->begin_phase_log_index() will be called initially and then
stage->inc() will be called for each block of log that is applied.
@return DB_SUCCESS, or error code on failure */
dberr_t
row_log_apply(
	trx_t*			trx,
	dict_index_t*		index,
	struct TABLE*		table,
	ut_stage_alter_t*	stage)
	MY_ATTRIBUTE((warn_unused_result));

/** Get the n_core_fields of online log for the index
@param	 index	index whose n_core_fields of log to be accessed
@return number of n_core_fields */
unsigned row_log_get_n_core_fields(const dict_index_t *index);

/** Get the error code of online log for the index
@param	index	online index
@return error code present in online log */
dberr_t row_log_get_error(const dict_index_t *index);

/** Mark all indexed virtual columns for computation during
online DDL. Virtual columns that are part of any index must be
computed and logged in the row log so their values are available
for index building and concurrent DML replay during ALTER TABLE
operations.
@param table       InnoDB table object
@param maria_table MariaDB table handle */
ATTRIBUTE_COLD
void row_log_mark_virtual_cols(const dict_table_t *table,
                               TABLE *maria_table) noexcept;
#ifdef HAVE_PSI_STAGE_INTERFACE
/** Estimate how much work is to be done by the log apply phase
of an ALTER TABLE for this index.
@param[in]	index	index whose log to assess
@return work to be done by log-apply in abstract units
*/
ulint
row_log_estimate_work(
	const dict_index_t*	index);
#endif /* HAVE_PSI_STAGE_INTERFACE */
