Interface between Innobase row operations and MySQL. More...

#include <debug_sync.h>
#include <gstream.h>
#include <spatial.h>
#include <sql_class.h>
#include <sql_const.h>
#include <sys/types.h>
#include <algorithm>
#include <deque>
#include <new>
#include <vector>
#include "btr0sea.h"
#include "ddl0ddl.h"
#include "dict0boot.h"
#include "dict0crea.h"
#include "dict0dd.h"
#include "dict0dict.h"
#include "dict0load.h"
#include "dict0priv.h"
#include "dict0stats.h"
#include "dict0stats_bg.h"
#include "fil0fil.h"
#include "fsp0file.h"
#include "fsp0sysspace.h"
#include "fts0fts.h"
#include "fts0types.h"
#include "ha_prototypes.h"
#include "ibuf0ibuf.h"
#include "lock0lock.h"
#include "log0buf.h"
#include "log0chkp.h"
#include "pars0pars.h"
#include "que0que.h"
#include "rem0cmp.h"
#include "row0ext.h"
#include "row0import.h"
#include "row0ins.h"
#include "row0mysql.h"
#include "row0pread.h"
#include "row0row.h"
#include "row0sel.h"
#include "row0upd.h"
#include "trx0purge.h"
#include "trx0rec.h"
#include "trx0roll.h"
#include "trx0undo.h"
#include "ut0cpu_cache.h"
#include "ut0new.h"
#include "current_thd.h"
#include "my_dbug.h"
#include "my_io.h"

Classes
struct	row_mysql_drop_t
	Chain node of the list of tables to drop in the background. More...

class	ib_dec_counter

Macros
#define	PREBUILT_HEAP_INITIAL_SIZE

Typedefs
typedef std::vector< btr_pcur_t, ut::allocator< btr_pcur_t > >	cursors_t

Functions
static	UT_LIST_BASE_NODE_T (row_mysql_drop_t, row_mysql_drop_list) row_mysql_drop_list
	List of tables we should drop in background. More...

static bool	row_add_table_to_background_drop_list (const char *name)
	If a table is not yet in the drop list, adds the table to the list of tables which the master thread drops in background. More...

void	row_wait_for_background_drop_list_empty ()
	Wait for the background drop list to become empty. More...

static void	row_mysql_delay_if_needed (void)
	Delays an INSERT, DELETE or UPDATE operation if the purge is lagging. More...

void	row_mysql_prebuilt_free_blob_heap (row_prebuilt_t *prebuilt)
	Frees the blob heap in prebuilt when no longer needed. More...

byte *	row_mysql_store_true_var_len (byte *dest, ulint len, ulint lenlen)
	Stores a >= 5.0.3 format true VARCHAR length to dest, in the MySQL row format. More...

const byte *	row_mysql_read_true_varchar (ulint len, const byte field, ulint lenlen)
	Reads a >= 5.0.3 format true VARCHAR length, in the MySQL row format, and returns a pointer to the data. More...

void	row_mysql_store_blob_ref (byte dest, ulint col_len, const void data, ulint len)
	Stores a reference to a BLOB in the MySQL format. More...

const byte *	row_mysql_read_blob_ref (ulint len, const byte ref, ulint col_len)
	Reads a reference to a BLOB in the MySQL format. More...

void	row_mysql_store_geometry (byte dest, ulint dest_len, const byte src, ulint src_len)
	Converting InnoDB geometry data format to MySQL data format. More...

static const byte *	row_mysql_read_geometry (ulint len, const byte ref, ulint col_len)
	Read geometry data in the MySQL format. More...

void	row_mysql_pad_col (ulint mbminlen, byte *pad, ulint len)
	Pad a column with spaces. More...

byte *	row_mysql_store_col_in_innobase_format (dfield_t dfield, byte buf, bool row_format_col, const byte *mysql_data, ulint col_len, ulint comp)
	Stores a non-SQL-NULL field given in the MySQL format in the InnoDB format. More...

static void	row_mysql_convert_row_to_innobase (dtuple_t row, row_prebuilt_t prebuilt, const byte mysql_rec, mem_heap_t *heap)
	Convert a row in the MySQL format to a row in the Innobase format. More...

bool	row_mysql_handle_errors (dberr_t new_err, trx_t trx, que_thr_t thr, trx_savept_t savept)
	Handles user errors and lock waits detected by the database engine. More...

row_prebuilt_t *	row_create_prebuilt (dict_table_t *table, ulint mysql_row_len)
	Create a prebuilt struct for a MySQL table handle. More...

void	row_prebuilt_free (row_prebuilt_t *prebuilt, bool dict_locked)
	Free a prebuilt struct for a MySQL table handle. More...

void	row_update_prebuilt_trx (row_prebuilt_t prebuilt, trx_t trx)
	Updates the transaction pointers in query graphs stored in the prebuilt struct. More...

static dtuple_t *	row_get_prebuilt_insert_row (row_prebuilt_t *prebuilt)
	Gets pointer to a prebuilt dtuple used in insertions. More...

static void	row_update_statistics_if_needed (dict_table_t *table)
	Updates the table modification counter and calculates new estimates for table and index statistics if necessary. More...

dberr_t	row_lock_table_autoinc_for_mysql (row_prebuilt_t *prebuilt)
	Sets an AUTO_INC type lock on the table mentioned in prebuilt. More...

dberr_t	row_lock_table (row_prebuilt_t *prebuilt)
	Sets a table lock on the table mentioned in prebuilt. More...

static dberr_t	row_explicit_rollback (dict_index_t index, const dtuple_t entry, que_thr_t thr, mtr_t mtr)
	Perform explicit rollback in absence of UNDO logs. More...

static void	row_mysql_to_innobase (dtuple_t row, row_prebuilt_t prebuilt, const byte *mysql_rec)
	Convert a row in the MySQL format to a row in the Innobase format. More...

static dberr_t	row_insert_for_mysql_using_cursor (const byte mysql_rec, row_prebuilt_t prebuilt)
	Does an insert for MySQL using cursor interface. More...

static dberr_t	row_insert_for_mysql_using_ins_graph (const byte mysql_rec, row_prebuilt_t prebuilt)
	Does an insert for MySQL using INSERT graph. More...

dberr_t	row_insert_for_mysql (const byte mysql_rec, row_prebuilt_t prebuilt)
	Does an insert for MySQL. More...

void	row_prebuild_sel_graph (row_prebuilt_t *prebuilt)
	Builds a dummy query graph used in selects. More...

upd_node_t *	row_create_update_node_for_mysql (dict_table_t table, mem_heap_t heap)
	Creates an query graph node of 'update' type to be used in the MySQL interface. More...

upd_t *	row_get_prebuilt_update_vector (row_prebuilt_t *prebuilt)
	Gets pointer to a prebuilt update vector used in updates. More...

static void	row_fts_do_update (trx_t trx, dict_table_t table, doc_id_t old_doc_id, doc_id_t new_doc_id)

static dberr_t	row_fts_update_or_delete (row_prebuilt_t *prebuilt)

static void	init_fts_doc_id_for_ref (dict_table_t table, ulint depth)
	Initialize the Doc ID system for FK table with FTS index. More...

static dberr_t	row_update_inplace_for_intrinsic (const upd_node_t *node)
	Do an in-place update in the intrinsic table. More...

static dberr_t	row_delete_for_mysql_using_cursor (const upd_node_t *node, cursors_t &delete_entries, const bool restore_delete)
	Delete row from table (corresponding entries from all the indexes). More...

static dberr_t	row_update_for_mysql_using_cursor (const upd_node_t node, cursors_t &delete_entries, que_thr_t thr)
	Does an update of a row for MySQL by inserting new entry with update values. More...

static dberr_t	row_del_upd_for_mysql_using_cursor (row_prebuilt_t *prebuilt)
	Does an update or delete of a row for MySQL. More...

static dberr_t	row_update_for_mysql_using_upd_graph (const byte mysql_rec, row_prebuilt_t prebuilt)
	Does an update or delete of a row for MySQL. More...

dberr_t	row_update_for_mysql (const byte mysql_rec, row_prebuilt_t prebuilt)
	Does an update or delete of a row for MySQL. More...

void	row_delete_all_rows (dict_table_t *table)
	Delete all rows for the given table by freeing/truncating indexes. More...

dberr_t	row_update_cascade_for_mysql (que_thr_t thr, upd_node_t node, dict_table_t *table)
	Does a cascaded delete or set null in a foreign key operation. More...

bool	row_table_got_default_clust_index (const dict_table_t *table)
	Checks if a table is such that we automatically created a clustered index on it (on row id). More...

void	row_mysql_freeze_data_dictionary (trx_t *trx, ut::Location location)
	Locks the data dictionary in shared mode from modifications, for performing foreign key check, rollback, or other operation invisible to MySQL. More...

void	row_mysql_unfreeze_data_dictionary (trx_t *trx)
	Unlocks the data dictionary shared lock. More...

void	row_mysql_lock_data_dictionary (trx_t *trx, ut::Location location)
	Locks the data dictionary exclusively for performing a table create or other data dictionary modification operation. More...

void	row_mysql_unlock_data_dictionary (trx_t *trx)
	Unlocks the data dictionary exclusive lock. More...

dberr_t	row_create_table_for_mysql (dict_table_t &table, const char compression, const HA_CREATE_INFO create_info, trx_t trx, mem_heap_t *heap)
	Creates a table for MySQL. More...

dberr_t	row_create_index_for_mysql (dict_index_t index, trx_t trx, const ulint field_lengths, dict_table_t handler)
	Does an index creation operation for MySQL. More...

dberr_t	row_table_load_foreign_constraints (trx_t trx, const char name, const dd::Table *dd_table)
	Loads foreign key constraints for the table being created. More...

static dberr_t	row_drop_table_for_mysql_in_background (const char *name)
	Drops a table for MySQL as a background operation. More...

ulint	row_drop_tables_for_mysql_in_background (void)
	TODO: NewDD: Need to check if there is need to keep background drop, in such case, the thd would be NULL (no MDL can be acquired) The master thread in srv0srv.cc calls this regularly to drop tables which we must drop in background after queries to them have ended. More...

static dberr_t	row_mysql_table_id_reassign (dict_table_t table, table_id_t new_id)
	Reassigns the table identifier of a table. More...

static dict_table_t *	row_discard_tablespace_begin (const char name, trx_t trx)
	Setup the pre-requisites for DISCARD TABLESPACE. More...

static dberr_t	row_discard_tablespace_foreign_key_checks (const trx_t trx, const dict_table_t table)
	Do the foreign key constraint checks. More...

static dberr_t	row_discard_tablespace_end (trx_t trx, dict_table_t table, dberr_t err, aux_name_vec_t *aux_vec)
	Cleanup after the DISCARD TABLESPACE operation. More...

static dberr_t	row_discard_tablespace (trx_t trx, dict_table_t table, aux_name_vec_t *aux_vec)
	Do the DISCARD TABLESPACE operation. More...

dberr_t	row_discard_tablespace_for_mysql (const char name, trx_t trx)
	Discards the tablespace of a table which stored in an .ibd file. More...

dberr_t	row_mysql_lock_table (trx_t trx, dict_table_t table, enum lock_mode mode, const char *op_info)
	Sets an exclusive lock on a table. More...

static dberr_t	row_drop_ancillary_fts_tables (dict_table_t table, aux_name_vec_t aux_vec, trx_t *trx)
	Drop ancillary FTS tables as part of dropping a table. More...

static dberr_t	row_drop_table_from_cache (dict_table_t table, trx_t trx)
	Drop a table from the memory cache as part of dropping a table. More...

dberr_t	row_drop_tablespace (space_id_t space_id, const char *filepath)
	Drop a tablespace as part of dropping or renaming a table. More...

dberr_t	row_drop_table_for_mysql (const char name, trx_t trx, bool nonatomic, dict_table_t *handler)
	Drop a table for MySQL. More...

bool	row_is_mysql_tmp_table_name (const char *name)
	Checks if a table name contains the string "/#sql" which denotes temporary tables in MySQL. More...

dberr_t	row_rename_table_for_mysql (const char old_name, const char new_name, const dd::Table dd_table, trx_t trx, bool replay)
	Renames a table for MySQL. More...

dberr_t	row_mysql_parallel_select_count_star (trx_t trx, std::vector< dict_index_t > &indexes, size_t n_threads, ulint *n_rows)
	Read the total number of records in a consistent view. More...

static dberr_t	parallel_check_table (trx_t trx, dict_index_t index, size_t n_threads, ulint *n_rows)

dberr_t	row_scan_index_for_mysql (row_prebuilt_t prebuilt, dict_index_t index, size_t max_threads, bool check_keys, ulint *n_rows)
	Scans an index for either COUNT(*) or CHECK TABLE. More...

void	row_mysql_init (void)
	Initialize this module. More...

void	row_mysql_close (void)
	Close this module. More...

Variables
static const char *	MODIFICATIONS_NOT_ALLOWED_MSG_FORCE_RECOVERY

bool	row_rollback_on_timeout = false
	Provide optional 4.x backwards compatibility for 5.0 and above. More...

static ib_mutex_t	row_drop_list_mutex
	Mutex protecting the background table drop list. More...

static bool	row_mysql_drop_list_inited = false
	Flag: has row_mysql_drop_list been initialized? More...

constexpr uint32_t	MAX_SRCH_KEY_VAL_BUFFER = 2 * 8 * MAX_REF_PARTS

Detailed Description

Interface between Innobase row operations and MySQL.

Contains also create table and other data dictionary operations.

Created 9/17/2000 Heikki Tuuri

Macro Definition Documentation

◆ PREBUILT_HEAP_INITIAL_SIZE

#define PREBUILT_HEAP_INITIAL_SIZE

Value:

  (sizeof(*prebuilt)                         /* allocd in this function */  \
   + DTUPLE_EST_ALLOC(search_tuple_n_fields) /* search_tuple */             \
   + DTUPLE_EST_ALLOC(search_tuple_n_fields) /* m_stop_tuple */             \
   + DTUPLE_EST_ALLOC(ref_len) /* allocd in row_prebuild_sel_graph() */     \
   + sizeof(sel_node_t) + sizeof(que_fork_t) +                              \
   sizeof(que_thr_t) /* allocd in row_get_prebuilt_update_vector() */       \
   + sizeof(upd_node_t) + sizeof(upd_t) +                                   \
   sizeof(upd_field_t) * table->get_n_cols() + sizeof(que_fork_t) +         \
   sizeof(que_thr_t)    /* allocd in row_get_prebuilt_insert_row() */       \
   + sizeof(ins_node_t) /* mysql_row_len could be huge and we are not       \
                        sure if this prebuilt instance is going to be       \
                        used in inserts */                                  \
   + (mysql_row_len < 256 ? mysql_row_len : 0) +                            \
   DTUPLE_EST_ALLOC(table->get_n_cols() + dict_table_get_n_v_cols(table)) + \
   sizeof(que_fork_t) + sizeof(que_thr_t) + sizeof(*prebuilt->pcur) +       \
   sizeof(*prebuilt->clust_pcur))

Typedef Documentation

◆ cursors_t

typedef std::vector<btr_pcur_t, ut::allocator<btr_pcur_t> > cursors_t

Function Documentation

◆ init_fts_doc_id_for_ref()

static void init_fts_doc_id_for_ref	(	dict_table_t *	table,
		ulint *	depth
	)

static

Initialize the Doc ID system for FK table with FTS index.

Parameters

table	in: table
depth	in: recursive call depth

◆ parallel_check_table()

static dberr_t parallel_check_table	(	trx_t *	trx,
		dict_index_t *	index,
		size_t	n_threads,
		ulint *	n_rows
	)

static

◆ row_add_table_to_background_drop_list()

static bool row_add_table_to_background_drop_list ( const char * name )

static

If a table is not yet in the drop list, adds the table to the list of tables which the master thread drops in background.

We need this on Unix because in ALTER TABLE MySQL may call drop table even if the table has running queries on it. Also, if there are running foreign key checks on the table, we drop the table lazily.

Returns: true if the table was not yet in the drop list, and was added there in: table name

We need this on Unix because in ALTER TABLE MySQL may call drop table even if the table has running queries on it. Also, if there are running foreign key checks on the table, we drop the table lazily.

Returns: true if the table was not yet in the drop list, and was added there

Parameters

name	in: table name

◆ row_create_index_for_mysql()

dberr_t row_create_index_for_mysql	(	dict_index_t *	index,
		trx_t *	trx,
		const ulint *	field_lengths,
		dict_table_t *	handler
	)

Does an index creation operation for MySQL.

TODO: currently failure to create an index results in dropping the whole table! This is no problem currently as all indexes must be created at the same time as the table.

Returns: error number or DB_SUCCESS

Parameters

index	in, own: index definition (will be freed)
trx	in: transaction handle
field_lengths	in: if not NULL, must contain dict_index_get_n_fields(index) actual field lengths for the index columns, which are then checked for not being too large.
handler	in/out: table handler.

◆ row_create_prebuilt()

row_prebuilt_t * row_create_prebuilt	(	dict_table_t *	table,
		ulint	mysql_row_len
	)

Create a prebuilt struct for a MySQL table handle.

Returns: own: a prebuilt struct

Parameters

table	in: Innobase table handle
mysql_row_len	in: length in bytes of a row in the MySQL format

◆ row_create_table_for_mysql()

dberr_t row_create_table_for_mysql	(	dict_table_t *&	table,
		const char *	compression,
		const HA_CREATE_INFO *	create_info,
		trx_t *	trx,
		mem_heap_t *	heap
	)

Creates a table for MySQL.

On success the in-memory table could be kept in non-LRU list while on failure the 'table' object will be freed.

Parameters

[in,out]	table	table definition(will be freed, or on DB_SUCCESS added to the data dictionary cache)
[in]	compression	compression algorithm to use, can be nullptr
[in]	create_info	HA_CREATE_INFO object
[in,out]	trx	transaction
[in]	heap	temp memory heap or nullptr

Returns: error code or DB_SUCCESS

◆ row_create_update_node_for_mysql()

upd_node_t * row_create_update_node_for_mysql	(	dict_table_t *	table,
		mem_heap_t *	heap
	)

Creates an query graph node of 'update' type to be used in the MySQL interface.

Returns: own: update node

Parameters

table	in: table to update
heap	in: mem heap from which allocated

◆ row_del_upd_for_mysql_using_cursor()

static dberr_t row_del_upd_for_mysql_using_cursor ( row_prebuilt_t * prebuilt )

static

Does an update or delete of a row for MySQL.

Parameters

[in,out] prebuilt prebuilt struct in MySQL handle

Returns: error code or DB_SUCCESS

◆ row_delete_all_rows()

void row_delete_all_rows ( dict_table_t * table )

Delete all rows for the given table by freeing/truncating indexes.

Parameters

[in,out] table table handler

◆ row_delete_for_mysql_using_cursor()

static dberr_t row_delete_for_mysql_using_cursor	(	const upd_node_t *	node,
		cursors_t &	delete_entries,
		const bool	restore_delete
	)

static

Delete row from table (corresponding entries from all the indexes).

Function will maintain cursor to the entries to invoke explicitly rollback just in case update action following delete fails.

Parameters

[in]	node	update node carrying information to delete.
[out]	delete_entries	vector of cursor to deleted entries.
[in]	restore_delete	if true, then restore DELETE records by unmarking delete.

Returns: error code or DB_SUCCESS

◆ row_discard_tablespace()

static dberr_t row_discard_tablespace	(	trx_t *	trx,
		dict_table_t *	table,
		aux_name_vec_t *	aux_vec
	)

static

Do the DISCARD TABLESPACE operation.

Parameters

[in,out]	trx	transaction handle
[in,out]	table	table to be discarded
[in,out]	aux_vec	fts aux table name vector

Returns: DB_SUCCESS or error code.

◆ row_discard_tablespace_begin()

static dict_table_t * row_discard_tablespace_begin	(	const char *	name,
		trx_t *	trx
	)

static

Setup the pre-requisites for DISCARD TABLESPACE.

It will start the transaction, acquire the data dictionary lock in X mode and open the table.

Returns: table instance or 0 if not found.

Parameters

name	in: table name
trx	in: transaction handle

◆ row_discard_tablespace_end()

static dberr_t row_discard_tablespace_end	(	trx_t *	trx,
		dict_table_t *	table,
		dberr_t	err,
		aux_name_vec_t *	aux_vec
	)

static

Cleanup after the DISCARD TABLESPACE operation.

Parameters

[in,out]	trx	transaction handle
[in,out]	table	table to be discarded
[in]	err	error code
[in,out]	aux_vec	fts aux table name vector

Returns: error code.

◆ row_discard_tablespace_for_mysql()

dberr_t row_discard_tablespace_for_mysql	(	const char *	name,
		trx_t *	trx
	)

Discards the tablespace of a table which stored in an .ibd file.

Discarding means that this function renames the .ibd file and assigns a new table id for the table. Also the flag table->ibd_file_missing is set to true.

Returns: error code or DB_SUCCESS

Parameters

name	in: table name
trx	in: transaction handle

◆ row_discard_tablespace_foreign_key_checks()

static dberr_t row_discard_tablespace_foreign_key_checks	(	const trx_t *	trx,
		const dict_table_t *	table
	)

static

Do the foreign key constraint checks.

Returns: DB_SUCCESS or error code.

Parameters

trx	in: transaction handle
table	in: table to be discarded

◆ row_drop_ancillary_fts_tables()

static dberr_t row_drop_ancillary_fts_tables	(	dict_table_t *	table,
		aux_name_vec_t *	aux_vec,
		trx_t *	trx
	)

inlinestatic

Drop ancillary FTS tables as part of dropping a table.

Parameters

[in,out]	table	Table cache entry
[in,out]	aux_vec	Fts aux table name vector
[in,out]	trx	Transaction handle

Returns: error code or DB_SUCCESS

◆ row_drop_table_for_mysql()

dberr_t row_drop_table_for_mysql	(	const char *	name,
		trx_t *	trx,
		bool	nonatomic,
		dict_table_t *	handler
	)

Drop a table for MySQL.

If the data dictionary was not already locked by the transaction, the transaction will be committed. Otherwise, the data dictionary will remain locked.

Parameters

[in]	name	Table name
[in]	trx	Transaction handle
[in]	nonatomic	Whether it is permitted to release and reacquire dict_operation_lock
[in,out]	handler	Table handler or NULL

Returns: error code or DB_SUCCESS

◆ row_drop_table_for_mysql_in_background()

static dberr_t row_drop_table_for_mysql_in_background ( const char * name )

static

Drops a table for MySQL as a background operation.

MySQL relies on Unix in ALTER TABLE to the fact that the table handler does not remove the table before all handles to it has been removed. Furthermore, the MySQL's call to drop table must be non-blocking. Therefore we do the drop table as a background operation, which is taken care of by the master thread in srv0srv.cc.

Returns: error code or DB_SUCCESS

Parameters

name	in: table name

◆ row_drop_table_from_cache()

static dberr_t row_drop_table_from_cache	(	dict_table_t *	table,
		trx_t *	trx
	)

inlinestatic

Drop a table from the memory cache as part of dropping a table.

Parameters

[in,out]	table	Table cache entry
[in,out]	trx	Transaction handle

Returns: error code or DB_SUCCESS

◆ row_drop_tables_for_mysql_in_background()

ulint row_drop_tables_for_mysql_in_background ( void )

TODO: NewDD: Need to check if there is need to keep background drop, in such case, the thd would be NULL (no MDL can be acquired) The master thread in srv0srv.cc calls this regularly to drop tables which we must drop in background after queries to them have ended.

The master thread in srv0srv.cc calls this regularly to drop tables which we must drop in background after queries to them have ended.

Such lazy dropping of tables is needed in ALTER TABLE on Unix.

Returns: how many tables dropped + remaining tables in list

◆ row_drop_tablespace()

dberr_t row_drop_tablespace	(	space_id_t	space_id,
		const char *	filepath
	)

Drop a tablespace as part of dropping or renaming a table.

This deletes the fil_space_t if found and the file on disk.

Parameters

[in]	space_id	Tablespace ID
[in]	filepath	File path of tablespace to delete

Returns: error code or DB_SUCCESS

◆ row_explicit_rollback()

static dberr_t row_explicit_rollback	(	dict_index_t *	index,
		const dtuple_t *	entry,
		que_thr_t *	thr,
		mtr_t *	mtr
	)

static

Perform explicit rollback in absence of UNDO logs.

Parameters

[in]	index	Apply rollback action on this index
[in]	entry	Entry to remove/rollback.
[in,out]	thr	Thread handler.
[in,out]	mtr	Mini-transaction.

Returns: error code or DB_SUCCESS

◆ row_fts_do_update()

static void row_fts_do_update	(	trx_t *	trx,
		dict_table_t *	table,
		doc_id_t	old_doc_id,
		doc_id_t	new_doc_id
	)

static

◆ row_fts_update_or_delete()

static dberr_t row_fts_update_or_delete ( row_prebuilt_t * prebuilt )

static

◆ row_get_prebuilt_insert_row()

static dtuple_t * row_get_prebuilt_insert_row ( row_prebuilt_t * prebuilt )

static

Gets pointer to a prebuilt dtuple used in insertions.

If the insert graph has not yet been built in the prebuilt struct, then this function first builds it.

Returns: prebuilt dtuple; the column type information is also set in it

Parameters

prebuilt in: prebuilt struct in MySQL handle

◆ row_get_prebuilt_update_vector()

upd_t * row_get_prebuilt_update_vector ( row_prebuilt_t * prebuilt )

Gets pointer to a prebuilt update vector used in updates.

If the update graph has not yet been built in the prebuilt struct, then this function first builds it.

Returns: prebuilt update vector

Parameters

prebuilt in: prebuilt struct in MySQL handle

◆ row_insert_for_mysql()

dberr_t row_insert_for_mysql	(	const byte *	mysql_rec,
		row_prebuilt_t *	prebuilt
	)

Does an insert for MySQL.

Parameters

[in]	mysql_rec	row in the MySQL format
[in,out]	prebuilt	prebuilt struct in MySQL handle

Returns: error code or DB_SUCCESS

◆ row_insert_for_mysql_using_cursor()

static dberr_t row_insert_for_mysql_using_cursor	(	const byte *	mysql_rec,
		row_prebuilt_t *	prebuilt
	)

static

Does an insert for MySQL using cursor interface.

Cursor interface is low level interface that directly interacts at Storage Level by-passing all the locking and transaction semantics. For InnoDB case, this will also by-pass hidden column generation.

Parameters

[in]	mysql_rec	row in the MySQL format
[in,out]	prebuilt	prebuilt struct in MySQL handle

Returns: error code or DB_SUCCESS

◆ row_insert_for_mysql_using_ins_graph()

static dberr_t row_insert_for_mysql_using_ins_graph	(	const byte *	mysql_rec,
		row_prebuilt_t *	prebuilt
	)

static

Does an insert for MySQL using INSERT graph.

This function will run/execute INSERT graph.

Parameters

[in]	mysql_rec	row in the MySQL format
[in,out]	prebuilt	prebuilt struct in MySQL handle

Returns: error code or DB_SUCCESS

◆ row_is_mysql_tmp_table_name()

bool row_is_mysql_tmp_table_name ( const char * name )

Checks if a table name contains the string "/#sql" which denotes temporary tables in MySQL.

Returns: true if temporary table in: table name in the form 'database/tablename'

◆ row_lock_table()

dberr_t row_lock_table ( row_prebuilt_t * prebuilt )

Sets a table lock on the table mentioned in prebuilt.

Parameters

[in,out] prebuilt table handle

Returns: error code or DB_SUCCESS

◆ row_lock_table_autoinc_for_mysql()

dberr_t row_lock_table_autoinc_for_mysql ( row_prebuilt_t * prebuilt )

Sets an AUTO_INC type lock on the table mentioned in prebuilt.

The AUTO_INC lock gives exclusive access to the auto-inc counter of the table. The lock is reserved only for the duration of an SQL statement. It is not compatible with another AUTO_INC or exclusive lock on the table.

Returns: error code or DB_SUCCESS

Parameters

prebuilt in: prebuilt struct in the MySQL table handle

◆ row_mysql_close()

void row_mysql_close ( void )

Close this module.

◆ row_mysql_convert_row_to_innobase()

static void row_mysql_convert_row_to_innobase	(	dtuple_t *	row,
		row_prebuilt_t *	prebuilt,
		const byte *	mysql_rec,
		mem_heap_t **	heap
	)

static

Convert a row in the MySQL format to a row in the Innobase format.

Note that the function to convert a MySQL format key value to an InnoDB dtuple is row_sel_convert_mysql_key_to_innobase() in row0sel.cc.

Parameters

row	in/out: Innobase row where the field type information is already copied there!
prebuilt	in: prebuilt struct where template must be of type ROW_MYSQL_WHOLE_ROW
mysql_rec	in: row in the MySQL format; NOTE: do not discard as long as row is used, as row may contain pointers to this record!
heap	in: heap will be used to duplicate multi_value & blob data

◆ row_mysql_delay_if_needed()

static void row_mysql_delay_if_needed ( void )

static

Delays an INSERT, DELETE or UPDATE operation if the purge is lagging.

◆ row_mysql_freeze_data_dictionary()

void row_mysql_freeze_data_dictionary	(	trx_t *	trx,
		ut::Location	location
	)

Locks the data dictionary in shared mode from modifications, for performing foreign key check, rollback, or other operation invisible to MySQL.

Parameters

[in,out]	trx	Transaction
[in]	location	Location

◆ row_mysql_handle_errors()

bool row_mysql_handle_errors	(	dberr_t *	new_err,
		trx_t *	trx,
		que_thr_t *	thr,
		trx_savept_t *	savept
	)

Handles user errors and lock waits detected by the database engine.

Returns: true if it was a lock wait and we should continue running the query thread and in that case the thr is ALREADY in the running state.

Parameters

new_err	out: possible new error encountered in lock wait, or if no new error, the value of trx->error_state at the entry of this function
trx	in: transaction
thr	in: query thread, or NULL
savept	in: savepoint, or NULL

◆ row_mysql_init()

void row_mysql_init ( void )

Initialize this module.

◆ row_mysql_lock_data_dictionary()

void row_mysql_lock_data_dictionary	(	trx_t *	trx,
		ut::Location	location
	)

Locks the data dictionary exclusively for performing a table create or other data dictionary modification operation.

Parameters

[in,out]	trx	Transaction
[in]	location	Location

◆ row_mysql_lock_table()

dberr_t row_mysql_lock_table	(	trx_t *	trx,
		dict_table_t *	table,
		enum lock_mode	mode,
		const char *	op_info
	)

Sets an exclusive lock on a table.

Returns: error code or DB_SUCCESS

Parameters

trx	in/out: transaction
table	in: table to lock
mode	in: LOCK_X or LOCK_S
op_info	in: string for trx->op_info

◆ row_mysql_pad_col()

void row_mysql_pad_col	(	ulint	mbminlen,
		byte *	pad,
		ulint	len
	)

Pad a column with spaces.

Parameters

[in]	mbminlen	Minimum size of a character, in bytes
[out]	pad	Padded buffer
[in]	len	Number of bytes to pad

◆ row_mysql_parallel_select_count_star()

dberr_t row_mysql_parallel_select_count_star	(	trx_t *	trx,
		std::vector< dict_index_t * > &	indexes,
		size_t	max_threads,
		ulint *	n_rows
	)

Read the total number of records in a consistent view.

Parameters

[in,out]	trx	Covering transaction.
[in]	indexes	Indexes to scan.
[in]	max_threads	Maximum number of threads to use.
[out]	n_rows	Number of rows seen.

Returns: DB_SUCCESS or error code.

◆ row_mysql_prebuilt_free_blob_heap()

void row_mysql_prebuilt_free_blob_heap ( row_prebuilt_t * prebuilt )

Frees the blob heap in prebuilt when no longer needed.

in: prebuilt struct of a ha_innobase:: table handle

◆ row_mysql_read_blob_ref()

const byte * row_mysql_read_blob_ref	(	ulint *	len,
		const byte *	ref,
		ulint	col_len
	)

Reads a reference to a BLOB in the MySQL format.

Parameters

[out]	len	BLOB length.
[in]	ref	BLOB reference in the MySQL format.
[in]	col_len	BLOB reference length (not BLOB length).

Returns: pointer to BLOB data

◆ row_mysql_read_geometry()

static const byte * row_mysql_read_geometry	(	ulint *	len,
		const byte *	ref,
		ulint	col_len
	)

static

Read geometry data in the MySQL format.

Returns: pointer to geometry data

Show the meaning of geometry data.

Parameters

len	out: data length
ref	in: geometry data in the MySQL format
col_len	in: MySQL format length

◆ row_mysql_read_true_varchar()

const byte * row_mysql_read_true_varchar	(	ulint *	len,
		const byte *	field,
		ulint	lenlen
	)

Reads a >= 5.0.3 format true VARCHAR length, in the MySQL row format, and returns a pointer to the data.

Returns: pointer to the data, we skip the 1 or 2 bytes at the start that are used to store the len

Parameters

len	out: variable-length field length
field	in: field in the MySQL format
lenlen	in: storage length of len: either 1 or 2 bytes

◆ row_mysql_store_blob_ref()

void row_mysql_store_blob_ref	(	byte *	dest,
		ulint	col_len,
		const void *	data,
		ulint	len
	)

Stores a reference to a BLOB in the MySQL format.

Parameters

[in]	dest	Where to store
[in,out]	col_len	Dest buffer size: determines into how many bytes the blob length is stored, the space for the length may vary from 1 to 4 bytes
[in]	data	Blob data; if the value to store is sql null this should be null pointer
[in]	len	Blob length; if the value to store is sql null this should be 0; remember also to set the null bit in the mysql record header!

◆ row_mysql_store_col_in_innobase_format()

byte * row_mysql_store_col_in_innobase_format	(	dfield_t *	dfield,
		byte *	buf,
		bool	row_format_col,
		const byte *	mysql_data,
		ulint	col_len,
		ulint	comp
	)

Stores a non-SQL-NULL field given in the MySQL format in the InnoDB format.

The counterpart of this function is row_sel_field_store_in_mysql_format() in row0sel.cc.

Returns: up to which byte we used buf in the conversion

Parameters

dfield	in/out: dfield where dtype information must be already set when this function is called!
buf	in/out: buffer for a converted integer value; this must be at least col_len long then! NOTE that dfield may also get a pointer to 'buf', therefore do not discard this as long as dfield is used!
row_format_col	true if the mysql_data is from a MySQL row, false if from a MySQL key value; in MySQL, a true VARCHAR storage format differs in a row and in a key value: in a key value the length is always stored in 2 bytes!
mysql_data	in: MySQL column value, not SQL NULL; NOTE that dfield may also get a pointer to mysql_data, therefore do not discard this as long as dfield is used!
col_len	in: MySQL column length; NOTE that this is the storage length of the column in the MySQL format row, not necessarily the length of the actual payload data; if the column is a true VARCHAR then this is irrelevant
comp	in: nonzero=compact format

◆ row_mysql_store_geometry()

void row_mysql_store_geometry	(	byte *	dest,
		ulint	dest_len,
		const byte *	src,
		ulint	src_len
	)

Converting InnoDB geometry data format to MySQL data format.

Converts InnoDB geometry data format to MySQL data format.

Show the meaning of geometry data.

Parameters

dest	in/out: where to store
dest_len	in: dest buffer size: determines into how many bytes the GEOMETRY length is stored, the space for the length may vary from 1 to 4 bytes
src	in: GEOMETRY data; if the value to store is SQL NULL this should be NULL pointer
src_len	in: GEOMETRY length; if the value to store is SQL NULL this should be 0; remember also to set the NULL bit in the MySQL record header!

◆ row_mysql_store_true_var_len()

byte * row_mysql_store_true_var_len	(	byte *	dest,
		ulint	len,
		ulint	lenlen
	)

Stores a >= 5.0.3 format true VARCHAR length to dest, in the MySQL row format.

Returns: pointer to the data, we skip the 1 or 2 bytes at the start that are used to store the len

Parameters

dest	in: where to store
len	in: length, must fit in two bytes
lenlen	in: storage length of len: either 1 or 2 bytes

◆ row_mysql_table_id_reassign()

static dberr_t row_mysql_table_id_reassign	(	dict_table_t *	table,
		table_id_t *	new_id
	)

static

Reassigns the table identifier of a table.

Parameters

[in,out]	table	table
[out]	new_id	new table id

Returns: error code or DB_SUCCESS

◆ row_mysql_to_innobase()

static void row_mysql_to_innobase	(	dtuple_t *	row,
		row_prebuilt_t *	prebuilt,
		const byte *	mysql_rec
	)

static

Convert a row in the MySQL format to a row in the Innobase format.

This is specialized function used for intrinsic table with reduce branching.

Parameters

[in,out]	row	row where field values are copied.
[in]	prebuilt	prebuilt handler
[in]	mysql_rec	row in mysql format.

◆ row_mysql_unfreeze_data_dictionary()

void row_mysql_unfreeze_data_dictionary ( trx_t * trx )

Unlocks the data dictionary shared lock.

in/out: transaction

Parameters

trx	in/out: transaction

◆ row_mysql_unlock_data_dictionary()

void row_mysql_unlock_data_dictionary ( trx_t * trx )

Unlocks the data dictionary exclusive lock.

in/out: transaction

Parameters

trx	in/out: transaction

◆ row_prebuild_sel_graph()

void row_prebuild_sel_graph ( row_prebuilt_t * prebuilt )

Builds a dummy query graph used in selects.

in: prebuilt struct in MySQL handle

◆ row_prebuilt_free()

void row_prebuilt_free	(	row_prebuilt_t *	prebuilt,
		bool	dict_locked
	)

Free a prebuilt struct for a MySQL table handle.

Parameters

[in,out]	prebuilt	Prebuilt struct
[in]	dict_locked	True=data dictionary locked

◆ row_rename_table_for_mysql()

dberr_t row_rename_table_for_mysql	(	const char *	old_name,
		const char *	new_name,
		const dd::Table *	dd_table,
		trx_t *	trx,
		bool	replay
	)

Renames a table for MySQL.

Parameters

[in]	old_name	old table name
[in]	new_name	new table name
[in]	dd_table	dd::Table for new table
[in,out]	trx	transaction
[in]	replay	whether in replay stage

Returns: error code or DB_SUCCESS

◆ row_scan_index_for_mysql()

dberr_t row_scan_index_for_mysql	(	row_prebuilt_t *	prebuilt,
		dict_index_t *	index,
		size_t	n_threads,
		bool	check_keys,
		ulint *	n_rows
	)

Scans an index for either COUNT(*) or CHECK TABLE.

If CHECK TABLE; Checks that the index contains entries in an ascending order, unique constraint is not broken, and calculates the number of index entries in the read view of the current transaction.

Parameters

[in,out]	prebuilt	Prebuilt struct in MySQL handle.
[in,out]	index	Index to scan.
[in]	n_threads	Number of threads to use for the scan
[in]	check_keys	True if called form check table.
[out]	n_rows	Number of entries seen in the consistent read.

Returns: DB_SUCCESS or other error

◆ row_table_got_default_clust_index()

bool row_table_got_default_clust_index ( const dict_table_t * table )

Checks if a table is such that we automatically created a clustered index on it (on row id).

Returns: true if the clustered index was generated automatically

Parameters

table in: table

◆ row_table_load_foreign_constraints()

dberr_t row_table_load_foreign_constraints	(	trx_t *	trx,
		const char *	name,
		const dd::Table *	dd_table
	)

Loads foreign key constraints for the table being created.

This function should be called after the indexes for a table have been created. Each foreign key constraint must be accompanied with indexes in both participating tables. The indexes are allowed to contain more fields than mentioned in the constraint.

Parameters

[in]	trx	transaction
[in]	name	table full name in normalized form
[in]	dd_table	MySQL dd::Table for the table

Returns: error code or DB_SUCCESS

◆ row_update_cascade_for_mysql()

dberr_t row_update_cascade_for_mysql	(	que_thr_t *	thr,
		upd_node_t *	node,
		dict_table_t *	table
	)

Does a cascaded delete or set null in a foreign key operation.

Returns: error code or DB_SUCCESS

Parameters

thr	in: query thread
node	in: update node used in the cascade or set null operation
table	in: table where we do the operation

◆ row_update_for_mysql()

dberr_t row_update_for_mysql	(	const byte *	mysql_rec,
		row_prebuilt_t *	prebuilt
	)

Does an update or delete of a row for MySQL.

Parameters

[in]	mysql_rec	row in the MySQL format
[in,out]	prebuilt	prebuilt struct in MySQL handle

Returns: error code or DB_SUCCESS

◆ row_update_for_mysql_using_cursor()

static dberr_t row_update_for_mysql_using_cursor	(	const upd_node_t *	node,
		cursors_t &	delete_entries,
		que_thr_t *	thr
	)

static

Does an update of a row for MySQL by inserting new entry with update values.

Parameters

[in]	node	update node carrying information to delete.
[out]	delete_entries	vector of cursor to deleted entries.
[in]	thr	thread handler

Returns: error code or DB_SUCCESS

◆ row_update_for_mysql_using_upd_graph()

static dberr_t row_update_for_mysql_using_upd_graph	(	const byte *	mysql_rec,
		row_prebuilt_t *	prebuilt
	)

static

Does an update or delete of a row for MySQL.

Parameters

[in]	mysql_rec	row in the MySQL format
[in,out]	prebuilt	prebuilt struct in MySQL handle

Returns: error code or DB_SUCCESS

◆ row_update_inplace_for_intrinsic()

static dberr_t row_update_inplace_for_intrinsic ( const upd_node_t * node )

static

Do an in-place update in the intrinsic table.

The update should not modify any of the keys and it should not change the size of any fields.

Parameters

[in] node the update node.

Returns: DB_SUCCESS on success, an error code on failure.

◆ row_update_prebuilt_trx()

void row_update_prebuilt_trx	(	row_prebuilt_t *	prebuilt,
		trx_t *	trx
	)

Updates the transaction pointers in query graphs stored in the prebuilt struct.

Parameters

[in,out]	prebuilt	Prebuilt struct in MySQL handle.
[in,out]	trx	Transaction handle.

◆ row_update_statistics_if_needed()

static void row_update_statistics_if_needed ( dict_table_t * table )

inlinestatic

Updates the table modification counter and calculates new estimates for table and index statistics if necessary.

Parameters

table in: table

◆ row_wait_for_background_drop_list_empty()

void row_wait_for_background_drop_list_empty ( )

Wait for the background drop list to become empty.

◆ UT_LIST_BASE_NODE_T()

static UT_LIST_BASE_NODE_T	(	row_mysql_drop_t	,
		row_mysql_drop_list
	)

static

List of tables we should drop in background.

ALTER TABLE in MySQL requires that the table handler can drop the table in background when there are no queries to it any more. Protected by row_drop_list_mutex.

Variable Documentation

◆ MAX_SRCH_KEY_VAL_BUFFER

constexpr uint32_t MAX_SRCH_KEY_VAL_BUFFER = 2 * 8 * MAX_REF_PARTS

constexpr

◆ MODIFICATIONS_NOT_ALLOWED_MSG_FORCE_RECOVERY

const char* MODIFICATIONS_NOT_ALLOWED_MSG_FORCE_RECOVERY

static

Initial value:

=
    "innodb_force_recovery is on. We do not allow database modifications"
    " by the user. Shut down mysqld and edit my.cnf to set"
    " innodb_force_recovery=0"

◆ row_drop_list_mutex

ib_mutex_t row_drop_list_mutex

static

Mutex protecting the background table drop list.

◆ row_mysql_drop_list_inited

bool row_mysql_drop_list_inited = false

static

Flag: has row_mysql_drop_list been initialized?

◆ row_rollback_on_timeout

bool row_rollback_on_timeout = false

Provide optional 4.x backwards compatibility for 5.0 and above.

Classes

Macros

Typedefs

Functions

Variables

Detailed Description

Macro Definition Documentation

◆ PREBUILT_HEAP_INITIAL_SIZE

Typedef Documentation

◆ cursors_t

Function Documentation

◆ init_fts_doc_id_for_ref()

◆ parallel_check_table()

◆ row_add_table_to_background_drop_list()

◆ row_create_index_for_mysql()

◆ row_create_prebuilt()

◆ row_create_table_for_mysql()

◆ row_create_update_node_for_mysql()

◆ row_del_upd_for_mysql_using_cursor()

◆ row_delete_all_rows()

◆ row_delete_for_mysql_using_cursor()

◆ row_discard_tablespace()

◆ row_discard_tablespace_begin()

◆ row_discard_tablespace_end()

◆ row_discard_tablespace_for_mysql()

◆ row_discard_tablespace_foreign_key_checks()

◆ row_drop_ancillary_fts_tables()

◆ row_drop_table_for_mysql()

◆ row_drop_table_for_mysql_in_background()

◆ row_drop_table_from_cache()

◆ row_drop_tables_for_mysql_in_background()

◆ row_drop_tablespace()

◆ row_explicit_rollback()

◆ row_fts_do_update()

◆ row_fts_update_or_delete()

◆ row_get_prebuilt_insert_row()

◆ row_get_prebuilt_update_vector()

◆ row_insert_for_mysql()

◆ row_insert_for_mysql_using_cursor()

◆ row_insert_for_mysql_using_ins_graph()

◆ row_is_mysql_tmp_table_name()

◆ row_lock_table()

◆ row_lock_table_autoinc_for_mysql()

◆ row_mysql_close()

◆ row_mysql_convert_row_to_innobase()

◆ row_mysql_delay_if_needed()

◆ row_mysql_freeze_data_dictionary()

◆ row_mysql_handle_errors()

◆ row_mysql_init()

◆ row_mysql_lock_data_dictionary()

◆ row_mysql_lock_table()

◆ row_mysql_pad_col()

◆ row_mysql_parallel_select_count_star()

◆ row_mysql_prebuilt_free_blob_heap()

◆ row_mysql_read_blob_ref()

◆ row_mysql_read_geometry()

◆ row_mysql_read_true_varchar()

◆ row_mysql_store_blob_ref()

◆ row_mysql_store_col_in_innobase_format()

◆ row_mysql_store_geometry()

◆ row_mysql_store_true_var_len()

◆ row_mysql_table_id_reassign()

◆ row_mysql_to_innobase()

◆ row_mysql_unfreeze_data_dictionary()

◆ row_mysql_unlock_data_dictionary()

◆ row_prebuild_sel_graph()

◆ row_prebuilt_free()

◆ row_rename_table_for_mysql()

◆ row_scan_index_for_mysql()

◆ row_table_got_default_clust_index()

◆ row_table_load_foreign_constraints()

◆ row_update_cascade_for_mysql()

◆ row_update_for_mysql()

◆ row_update_for_mysql_using_cursor()

◆ row_update_for_mysql_using_upd_graph()

◆ row_update_inplace_for_intrinsic()

◆ row_update_prebuilt_trx()

◆ row_update_statistics_if_needed()

◆ row_wait_for_background_drop_list_empty()

◆ UT_LIST_BASE_NODE_T()