Apply InnoDB snapshot innodb-5.1-ss1726.

Bug #16979: AUTO_INC lock in InnoDB works a table level lock
  - this is a major change in InnoDB auto-inc handling.
Bug #27950: Duplicate entry error in auto-inc after mysqld restart
  - Init AUTOINC from delete_row().
Bug #28781: InnoDB increments auto-increment value incorrectly with ON DUPLICATE KEY UPDATE
  - Use value specified by MySQL, in update_row().

mysql-test/r/innodb.result

@@ -501,7 +501,7 @@ ERROR 23000: Duplicate entry 'test2' for key 'ggid'
 select * from t1;
 id	ggid	email	passwd
 1	this will work		
-3	test2		this will work
+4	test2		this will work
 select * from t1 where id=1;
 id	ggid	email	passwd
 1	this will work		

storage/innobase/dict/dict0dict.c

@@ -410,14 +410,27 @@ dict_table_get_col_name(
 	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);
 
 	s = table->col_names;
-
+	if (s) {
 		for (i = 0; i < col_nr; i++) {
 			s += strlen(s) + 1;
 		}
+	}
 
 	return(s);
 }
 
+
+/************************************************************************
+Acquire the autoinc lock.*/
+
+void
+dict_table_autoinc_lock(
+/*====================*/
+	dict_table_t*	table)
+{
+	mutex_enter(&table->autoinc_mutex);
+}
+
 /************************************************************************
 Initializes the autoinc counter. It is not an error to initialize an already
 initialized counter. */
@@ -428,54 +441,8 @@ dict_table_autoinc_initialize(
 	dict_table_t*	table,	/* in: table */
 	ib_longlong	value)	/* in: next value to assign to a row */
 {
-	mutex_enter(&(table->autoinc_mutex));
-
 	table->autoinc_inited = TRUE;
 	table->autoinc = value;
-
-	mutex_exit(&(table->autoinc_mutex));
-}
-
-/************************************************************************
-Gets the next autoinc value (== autoinc counter value), 0 if not yet
-initialized. If initialized, increments the counter by 1. */
-
-ib_longlong
-dict_table_autoinc_get(
-/*===================*/
-				/* out: value for a new row, or 0 */
-	dict_table_t*	table)	/* in: table */
-{
-	ib_longlong	value;
-
-	mutex_enter(&(table->autoinc_mutex));
-
-	if (!table->autoinc_inited) {
-
-		value = 0;
-	} else {
-		value = table->autoinc;
-		table->autoinc = table->autoinc + 1;
-	}
-
-	mutex_exit(&(table->autoinc_mutex));
-
-	return(value);
-}
-
-/************************************************************************
-Decrements the autoinc counter value by 1. */
-
-void
-dict_table_autoinc_decrement(
-/*=========================*/
-	dict_table_t*	table)	/* in: table */
-{
-	mutex_enter(&(table->autoinc_mutex));
-
-	table->autoinc = table->autoinc - 1;
-
-	mutex_exit(&(table->autoinc_mutex));
 }
 
 /************************************************************************
@@ -490,32 +457,6 @@ dict_table_autoinc_read(
 {
 	ib_longlong	value;
 
-	mutex_enter(&(table->autoinc_mutex));
-
-	if (!table->autoinc_inited) {
-
-		value = 0;
-	} else {
-		value = table->autoinc;
-	}
-
-	mutex_exit(&(table->autoinc_mutex));
-
-	return(value);
-}
-
-/************************************************************************
-Peeks the autoinc counter value, 0 if not yet initialized. Does not
-increment the counter. The read not protected by any mutex! */
-
-ib_longlong
-dict_table_autoinc_peek(
-/*====================*/
-				/* out: value of the counter */
-	dict_table_t*	table)	/* in: table */
-{
-	ib_longlong	value;
-
 	if (!table->autoinc_inited) {
 
 		value = 0;
@@ -527,7 +468,7 @@ dict_table_autoinc_peek(
 }
 
 /************************************************************************
-Updates the autoinc counter if the value supplied is equal or bigger than the
+Updates the autoinc counter if the value supplied is greater than the
 current value. If not inited, does nothing. */
 
 void
@@ -537,15 +478,21 @@ dict_table_autoinc_update(
 	dict_table_t*	table,	/* in: table */
 	ib_longlong	value)	/* in: value which was assigned to a row */
 {
-	mutex_enter(&(table->autoinc_mutex));
+	if (table->autoinc_inited && value > table->autoinc) {
 
-	if (table->autoinc_inited) {
+		table->autoinc = value;
-		if (value >= table->autoinc) {
-			table->autoinc = value + 1;
-		}
 	}
+}
 
-	mutex_exit(&(table->autoinc_mutex));
+/************************************************************************
+Release the autoinc lock.*/
+
+void
+dict_table_autoinc_unlock(
+/*======================*/
+	dict_table_t*	table)	/* in: release autoinc lock for this table */
+{
+	mutex_exit(&table->autoinc_mutex);
 }
 
 /************************************************************************
@@ -842,28 +789,18 @@ dict_table_get(
 }
 
 /**************************************************************************
-Adds a table object to the dictionary cache. */
+Adds system columns to a table object. */
 
 void
-dict_table_add_to_cache(
+dict_table_add_system_columns(
-/*====================*/
+/*==========================*/
-	dict_table_t*	table)	/* in: table */
+	dict_table_t*	table,	/* in/out: table */
+	mem_heap_t*	heap)	/* in: temporary heap */
 {
-	ulint	fold;
-	ulint	id_fold;
-	ulint	i;
-	ulint	row_len;
-
 	ut_ad(table);
-	ut_ad(mutex_own(&(dict_sys->mutex)));
 	ut_ad(table->n_def == table->n_cols - DATA_N_SYS_COLS);
 	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);
-	ut_ad(table->cached == FALSE);
+	ut_ad(!table->cached);
-
-	fold = ut_fold_string(table->name);
-	id_fold = ut_fold_dulint(table->id);
-
-	table->cached = TRUE;
 
 	/* NOTE: the system columns MUST be added in the following order
 	(so that they can be indexed by the numerical value of DATA_ROW_ID,
@@ -871,19 +808,19 @@ dict_table_add_to_cache(
 	The clustered index will not always physically contain all
 	system columns. */
 
-	dict_mem_table_add_col(table, "DB_ROW_ID", DATA_SYS,
+	dict_mem_table_add_col(table, heap, "DB_ROW_ID", DATA_SYS,
 			       DATA_ROW_ID | DATA_NOT_NULL,
 			       DATA_ROW_ID_LEN);
 #if DATA_ROW_ID != 0
 #error "DATA_ROW_ID != 0"
 #endif
-	dict_mem_table_add_col(table, "DB_TRX_ID", DATA_SYS,
+	dict_mem_table_add_col(table, heap, "DB_TRX_ID", DATA_SYS,
 			       DATA_TRX_ID | DATA_NOT_NULL,
 			       DATA_TRX_ID_LEN);
 #if DATA_TRX_ID != 1
 #error "DATA_TRX_ID != 1"
 #endif
-	dict_mem_table_add_col(table, "DB_ROLL_PTR", DATA_SYS,
+	dict_mem_table_add_col(table, heap, "DB_ROLL_PTR", DATA_SYS,
 			       DATA_ROLL_PTR | DATA_NOT_NULL,
 			       DATA_ROLL_PTR_LEN);
 #if DATA_ROLL_PTR != 2
@@ -895,10 +832,34 @@ dict_table_add_to_cache(
 #if DATA_N_SYS_COLS != 3
 #error "DATA_N_SYS_COLS != 3"
 #endif
+}
+
+/**************************************************************************
+Adds a table object to the dictionary cache. */
+
+void
+dict_table_add_to_cache(
+/*====================*/
+	dict_table_t*	table,	/* in: table */
+	mem_heap_t*	heap)	/* in: temporary heap */
+{
+	ulint	fold;
+	ulint	id_fold;
+	ulint	i;
+	ulint	row_len;
 
 	/* The lower limit for what we consider a "big" row */
 #define BIG_ROW_SIZE 1024
 
+	ut_ad(mutex_own(&(dict_sys->mutex)));
+
+	dict_table_add_system_columns(table, heap);
+
+	table->cached = TRUE;
+
+	fold = ut_fold_string(table->name);
+	id_fold = ut_fold_dulint(table->id);
+
 	row_len = 0;
 	for (i = 0; i < table->n_def; i++) {
 		ulint	col_len = dict_col_get_max_size(

storage/innobase/dict/dict0mem.c

@@ -90,6 +90,11 @@ dict_mem_table_create(
 	mutex_create(&table->autoinc_mutex, SYNC_DICT_AUTOINC_MUTEX);
 
 	table->autoinc_inited = FALSE;
+
+	/* The actual increment value will be set by MySQL, we simply
+	default to 1 here.*/
+	table->autoinc_increment = 1;
+
 #ifdef UNIV_DEBUG
 	table->magic_n = DICT_TABLE_MAGIC_N;
 #endif /* UNIV_DEBUG */
@@ -108,18 +113,11 @@ dict_mem_table_free(
 	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);
 
 	mutex_free(&(table->autoinc_mutex));
-
-	if (table->col_names && (table->n_def < table->n_cols)) {
-		ut_free((void*)table->col_names);
-	}
-
 	mem_heap_free(table->heap);
 }
 
 /********************************************************************
-Add 'name' to end of the col_names array (see dict_table_t::col_names). Call
+Append 'name' to 'col_names' (@see dict_table_t::col_names). */
-ut_free on col_names (if not NULL), allocate new array (if heap, from it,
-otherwise with ut_malloc), and copy col_names + name to it. */
 static
 const char*
 dict_add_col_name(
@@ -129,21 +127,19 @@ dict_add_col_name(
 					NULL */
 	ulint		cols,		/* in: number of existing columns */
 	const char*	name,		/* in: new column name */
-	mem_heap_t*	heap)		/* in: heap, or NULL */
+	mem_heap_t*	heap)		/* in: heap */
 {
-	ulint		i;
 	ulint	old_len;
 	ulint	new_len;
 	ulint	total_len;
-	const char*	s;
 	char*	res;
 
-	ut_a(((cols == 0) && !col_names) || ((cols > 0) && col_names));
+	ut_ad(!cols == !col_names);
-	ut_a(*name);
 
 	/* Find out length of existing array. */
 	if (col_names) {
-		s = col_names;
+		const char*	s = col_names;
+		ulint		i;
 
 		for (i = 0; i < cols; i++) {
 			s += strlen(s) + 1;
@@ -157,11 +153,7 @@ dict_add_col_name(
 	new_len = strlen(name) + 1;
 	total_len = old_len + new_len;
 
-	if (heap) {
 	res = mem_heap_alloc(heap, total_len);
-	} else {
-		res = ut_malloc(total_len);
-	}
 
 	if (old_len > 0) {
 		memcpy(res, col_names, old_len);
@@ -169,10 +161,6 @@ dict_add_col_name(
 
 	memcpy(res + old_len, name, new_len);
 
-	if (col_names) {
-		ut_free((char*)col_names);
-	}
-
 	return(res);
 }
 
@@ -183,7 +171,8 @@ void
 dict_mem_table_add_col(
 /*===================*/
 	dict_table_t*	table,	/* in: table */
-	const char*	name,	/* in: column name */
+	mem_heap_t*	heap,	/* in: temporary memory heap, or NULL */
+	const char*	name,	/* in: column name, or NULL */
 	ulint		mtype,	/* in: main datatype */
 	ulint		prtype,	/* in: precise type */
 	ulint		len)	/* in: precision */
@@ -191,21 +180,32 @@ dict_mem_table_add_col(
 	dict_col_t*	col;
 	ulint		mbminlen;
 	ulint		mbmaxlen;
-	mem_heap_t*	heap;
+	ulint		i;
 
-	ut_ad(table && name);
+	ut_ad(table);
 	ut_ad(table->magic_n == DICT_TABLE_MAGIC_N);
+	ut_ad(!heap == !name);
 
-	table->n_def++;
+	i = table->n_def++;
+
+	if (name) {
+		if (UNIV_UNLIKELY(table->n_def == table->n_cols)) {
+			heap = table->heap;
+		}
+		if (UNIV_LIKELY(i) && UNIV_UNLIKELY(!table->col_names)) {
+			/* All preceding column names are empty. */
+			char* s = mem_heap_alloc(heap, table->n_def);
+			memset(s, 0, table->n_def);
+			table->col_names = s;
+		}
 
-	heap = table->n_def < table->n_cols ? NULL : table->heap;
 		table->col_names = dict_add_col_name(table->col_names,
-					     table->n_def - 1,
+						     i, name, heap);
-					     name, heap);
+	}
 
-	col = (dict_col_t*) dict_table_get_nth_col(table, table->n_def - 1);
+	col = (dict_col_t*) dict_table_get_nth_col(table, i);
 
-	col->ind = table->n_def - 1;
+	col->ind = i;
 	col->ord_part = 0;
 
 	col->mtype = (unsigned int) mtype;
@@ -318,7 +318,7 @@ dict_mem_index_add_field(
 {
 	dict_field_t*	field;
 
-	ut_ad(index && name);
+	ut_ad(index);
 	ut_ad(index->magic_n == DICT_INDEX_MAGIC_N);
 
 	index->n_def++;

storage/innobase/handler/ha_innodb.h

@@ -32,7 +32,10 @@ typedef struct st_innobase_share {
 } INNOBASE_SHARE;
 
 
+struct dict_index_struct;
 struct row_prebuilt_struct;
+
+typedef struct dict_index_struct dict_index_t;
 typedef struct row_prebuilt_struct row_prebuilt_t;
 
 /* The class defining a handle to an Innodb table */
@@ -70,6 +73,11 @@ class ha_innobase: public handler
 	int change_active_index(uint keynr);
 	int general_fetch(uchar* buf, uint direction, uint match_mode);
 	int innobase_read_and_init_auto_inc(longlong* ret);
+	ulong innobase_autoinc_lock();
+	ulong innobase_set_max_autoinc(ulonglong auto_inc);
+	ulong innobase_reset_autoinc(ulonglong auto_inc);
+	ulong innobase_get_auto_increment(ulonglong* value);
+	dict_index_t* innobase_get_index(uint keynr);
 
 	/* Init values for the class: */
  public:

storage/innobase/ibuf/ibuf0ibuf.c

@@ -462,7 +462,8 @@ ibuf_data_init_for_space(
 	page_t*		root;
 	page_t*		header_page;
 	mtr_t		mtr;
-	char		buf[50];
+	char*		buf;
+	mem_heap_t*	heap;
 	dict_table_t*	table;
 	dict_index_t*	index;
 	ulint		n_used;
@@ -516,16 +517,20 @@ ibuf_data_init_for_space(
 
 	ibuf_exit();
 
+	heap = mem_heap_create(450);
+	buf = mem_heap_alloc(heap, 50);
+
 	sprintf(buf, "SYS_IBUF_TABLE_%lu", (ulong) space);
 	/* use old-style record format for the insert buffer */
 	table = dict_mem_table_create(buf, space, 2, 0);
 
-	dict_mem_table_add_col(table, "PAGE_NO", DATA_BINARY, 0, 0);
+	dict_mem_table_add_col(table, heap, "PAGE_NO", DATA_BINARY, 0, 0);
-	dict_mem_table_add_col(table, "TYPES", DATA_BINARY, 0, 0);
+	dict_mem_table_add_col(table, heap, "TYPES", DATA_BINARY, 0, 0);
 
 	table->id = ut_dulint_add(DICT_IBUF_ID_MIN, space);
 
-	dict_table_add_to_cache(table);
+	dict_table_add_to_cache(table, heap);
+	mem_heap_free(heap);
 
 	index = dict_mem_index_create(
 		buf, "CLUST_IND", space,
@@ -1139,7 +1144,7 @@ ibuf_dummy_index_add_col(
 	ulint		len)	/* in: length of the column */
 {
 	ulint	i	= index->table->n_def;
-	dict_mem_table_add_col(index->table, "DUMMY",
+	dict_mem_table_add_col(index->table, NULL, NULL,
 			       dtype_get_mtype(type),
 			       dtype_get_prtype(type),
 			       dtype_get_len(type));
@@ -1161,11 +1166,6 @@ ibuf_dummy_index_free(
 	dict_mem_table_free(table);
 }
 
-void
-dict_index_print_low(
-/*=================*/
-	dict_index_t*	index);	/* in: index */
-
 /*************************************************************************
 Builds the entry to insert into a non-clustered index when we have the
 corresponding record in an ibuf index. */

storage/innobase/include/dict0dict.h

@@ -171,6 +171,13 @@ dict_col_name_is_reserved(
 				/* out: TRUE if name is reserved */
 	const char*	name);	/* in: column name */
 /************************************************************************
+Acquire the autoinc lock.*/
+
+void
+dict_table_autoinc_lock(
+/*====================*/
+	dict_table_t*	table);	/* in: table */
+/************************************************************************
 Initializes the autoinc counter. It is not an error to initialize an already
 initialized counter. */
 
@@ -180,22 +187,6 @@ dict_table_autoinc_initialize(
 	dict_table_t*	table,	/* in: table */
 	ib_longlong	value);	/* in: next value to assign to a row */
 /************************************************************************
-Gets the next autoinc value (== autoinc counter value), 0 if not yet
-initialized. If initialized, increments the counter by 1. */
-
-ib_longlong
-dict_table_autoinc_get(
-/*===================*/
-				/* out: value for a new row, or 0 */
-	dict_table_t*	table);	/* in: table */
-/************************************************************************
-Decrements the autoinc counter value by 1. */
-
-void
-dict_table_autoinc_decrement(
-/*=========================*/
-	dict_table_t*	table);	/* in: table */
-/************************************************************************
 Reads the next autoinc value (== autoinc counter value), 0 if not yet
 initialized. */
 
@@ -205,15 +196,6 @@ dict_table_autoinc_read(
 				/* out: value for a new row, or 0 */
 	dict_table_t*	table);	/* in: table */
 /************************************************************************
-Peeks the autoinc counter value, 0 if not yet initialized. Does not
-increment the counter. The read not protected by any mutex! */
-
-ib_longlong
-dict_table_autoinc_peek(
-/*====================*/
-				/* out: value of the counter */
-	dict_table_t*	table);	/* in: table */
-/************************************************************************
 Updates the autoinc counter if the value supplied is equal or bigger than the
 current value. If not inited, does nothing. */
 
@@ -223,13 +205,29 @@ dict_table_autoinc_update(
 
 	dict_table_t*	table,	/* in: table */
 	ib_longlong	value);	/* in: value which was assigned to a row */
+/************************************************************************
+Release the autoinc lock.*/
+
+void
+dict_table_autoinc_unlock(
+/*======================*/
+	dict_table_t*	table);	/* in: table */
+/**************************************************************************
+Adds system columns to a table object. */
+
+void
+dict_table_add_system_columns(
+/*==========================*/
+	dict_table_t*	table,	/* in/out: table */
+	mem_heap_t*	heap);	/* in: temporary heap */
 /**************************************************************************
 Adds a table object to the dictionary cache. */
 
 void
 dict_table_add_to_cache(
 /*====================*/
-	dict_table_t*	table);	/* in: table */
+	dict_table_t*	table,	/* in: table */
+	mem_heap_t*	heap);	/* in: temporary heap */
 /**************************************************************************
 Removes a table object from the dictionary cache. */
 

storage/innobase/include/dict0mem.h

@@ -72,7 +72,8 @@ void
 dict_mem_table_add_col(
 /*===================*/
 	dict_table_t*	table,	/* in: table */
-	const char*	name,	/* in: column name */
+	mem_heap_t*	heap,	/* in: temporary memory heap, or NULL */
+	const char*	name,	/* in: column name, or NULL */
 	ulint		mtype,	/* in: main datatype */
 	ulint		prtype,	/* in: precise type */
 	ulint		len);	/* in: precision */
@@ -410,6 +411,11 @@ struct dict_table_struct{
 				SELECT MAX(auto inc column) */
 	ib_longlong	autoinc;/* autoinc counter value to give to the
 				next inserted row */
+
+	ib_longlong	autoinc_increment;
+				/* The increment step of the auto increment
+				column. Value must be greater than or equal
+				to 1 */
 #ifdef UNIV_DEBUG
 	ulint		magic_n;/* magic number */
 # define DICT_TABLE_MAGIC_N	76333786

storage/innobase/include/lock0lock.h

@@ -609,7 +609,7 @@ lock_validate(void);
 			/* out: TRUE if ok */
 /*************************************************************************
 Return approximate number or record locks (bits set in the bitmap) for
-this transaction. Since delete-marked records maybe removed, the
+this transaction. Since delete-marked records may be removed, the
 record count will not be precise. */
 
 ulint

storage/innobase/include/row0mysql.h

@@ -670,6 +670,7 @@ struct row_prebuilt_struct {
 					to this heap */
 	mem_heap_t*	old_vers_heap;	/* memory heap where a previous
 					version is built in consistent read */
+	ulonglong	last_value;	/* last value of AUTO-INC interval */
 	ulint		magic_n2;	/* this should be the same as
 					magic_n */
 };

storage/innobase/include/row0sel.h

@@ -171,7 +171,17 @@ row_search_check_if_query_cache_permitted(
 	trx_t*		trx,		/* in: transaction object */
 	const char*	norm_name);	/* in: concatenation of database name,
 					'/' char, table name */
+/***********************************************************************
+Read the max AUTOINC value from an index. */
 
+ulint
+row_search_max_autoinc(
+/*===================*/
+					/* out: DB_SUCCESS if all OK else
+					error code */
+	dict_index_t*	index,		/* in: index to search */
+	const char*	col_name,	/* in: autoinc column name */
+	ib_longlong*	value);		/* out: AUTOINC value read */
 
 /* A structure for caching column values for prefetched rows */
 struct sel_buf_struct{

storage/innobase/include/trx0trx.h

@@ -681,6 +681,9 @@ struct trx_struct{
 	trx_undo_arr_t*	undo_no_arr;	/* array of undo numbers of undo log
 					records which are currently processed
 					by a rollback operation */
+	ulint		n_autoinc_rows;	/* no. of AUTO-INC rows required for
+					an SQL statement. This is useful for
+					multi-row INSERTs */
 	/*------------------------------*/
 	char detailed_error[256];	/* detailed error message for last
 					error, or empty. */

storage/innobase/include/ut0mem.h

@@ -63,7 +63,7 @@ ut_test_malloc(
 			/* out: TRUE if succeeded */
 	ulint	n);	/* in: try to allocate this many bytes */
 /**************************************************************************
-Frees a memory bloock allocated with ut_malloc. */
+Frees a memory block allocated with ut_malloc. */
 
 void
 ut_free(

storage/innobase/log/log0recv.c

@@ -2481,7 +2481,6 @@ recv_init_crash_recovery(void)
 			"InnoDB: buffer...\n");
 		trx_sys_doublewrite_init_or_restore_pages(TRUE);
 	}
-	
 }
 
 /************************************************************

storage/innobase/row/row0mysql.c

@@ -655,6 +655,8 @@ row_create_prebuilt(
 
 	prebuilt->old_vers_heap = NULL;
 
+	prebuilt->last_value = 0;
+
 	return(prebuilt);
 }
 
@@ -2894,6 +2896,8 @@ next_rec:
 		dict_table_change_id_in_cache(table, new_id);
 	}
 
+	/* MySQL calls ha_innobase::reset_auto_increment() which does
+	the same thing. */
 	dict_table_autoinc_initialize(table, 0);
 	dict_update_statistics(table);
 

storage/innobase/row/row0sel.c

@@ -4519,3 +4519,169 @@ row_search_check_if_query_cache_permitted(
 
 	return(ret);
 }
+
+/***********************************************************************
+Read the AUTOINC column from the current row. */
+static
+ib_longlong
+row_search_autoinc_read_column(
+/*===========================*/
+					/* out: value read from the column */
+	dict_index_t*	index,		/* in: index to read from */
+	const rec_t*	rec,		/* in: current rec */
+	ulint		col_no,		/* in: column number */
+	ibool		unsigned_type)	/* in: signed or unsigned flag */
+{
+	ulint		len;
+	byte*		ptr;
+	const byte*	data;
+	ib_longlong	value;
+	mem_heap_t*	heap = NULL;
+	byte		dest[sizeof(value)];
+	ulint		offsets_[REC_OFFS_NORMAL_SIZE];
+	ulint*		offsets	= offsets_;
+
+	*offsets_ = sizeof offsets_ / sizeof *offsets_;
+
+	/* TODO: We have to cast away the const of rec for now.  This needs
+	to be fixed later.*/
+	offsets = rec_get_offsets(
+		(rec_t*) rec, index, offsets, ULINT_UNDEFINED, &heap);
+
+	/* TODO: We have to cast away the const of rec for now.  This needs
+	to be fixed later.*/
+	data = rec_get_nth_field((rec_t*)rec, offsets, col_no, &len);
+
+	ut_a(len != UNIV_SQL_NULL);
+	ut_a(len <= sizeof value);
+
+	/* Convert integer data from Innobase to a little-endian format,
+	sign bit restored to normal */
+
+	for (ptr = dest + len; ptr != dest; ++data) {
+		--ptr;
+		*ptr = *data;
+	}
+
+	if (!unsigned_type) {
+		dest[len - 1] ^= 128;
+	}
+
+	/* The assumption here is that the AUTOINC value can't be negative.*/
+	switch (len) {
+	case 8:
+		value = *(ib_longlong*) ptr;
+		break;
+
+	case 4:
+		value = *(ib_uint32_t*) ptr;
+		break;
+
+	case 2:
+		value = *(uint16 *) ptr;
+		break;
+
+	case 1:
+		value = *ptr;
+		break;
+
+	default:
+		ut_error;
+	}
+
+	if (UNIV_LIKELY_NULL(heap)) {
+		mem_heap_free(heap);
+	}
+
+	ut_a(value >= 0);
+
+	return(value);
+}
+
+/***********************************************************************
+Get the last row. */
+static
+const rec_t*
+row_search_autoinc_get_rec(
+/*=======================*/
+					/* out: current rec or NULL */
+	btr_pcur_t*	pcur,		/* in: the current cursor */
+	mtr_t*		mtr)		/* in: mini transaction */
+{
+	do {
+		const rec_t* rec = btr_pcur_get_rec(pcur);
+
+		if (page_rec_is_user_rec(rec)) {
+			return(rec);
+		}
+	} while (btr_pcur_move_to_prev(pcur, mtr));
+
+	return(NULL);
+}
+
+/***********************************************************************
+Read the max AUTOINC value from an index. */
+
+ulint
+row_search_max_autoinc(
+/*===================*/
+					/* out: DB_SUCCESS if all OK else
+					error code, DB_RECORD_NOT_FOUND if
+					column name can't be found in index */
+	dict_index_t*	index,		/* in: index to search */
+	const char*	col_name,	/* in: name of autoinc column */
+	ib_longlong*	value)		/* out: AUTOINC value read */
+{
+	ulint		i;
+	ulint		n_cols;
+	dict_field_t*	dfield = NULL;
+	ulint		error = DB_SUCCESS;
+
+	n_cols = dict_index_get_n_ordering_defined_by_user(index);
+
+	/* Search the index for the AUTOINC column name */
+	for (i = 0; i < n_cols; ++i) {
+		dfield = dict_index_get_nth_field(index, i);
+
+		if (strcmp(col_name, dfield->name) == 0) {
+			break;
+		}
+	}
+
+	*value = 0;
+
+	/* Must find the AUTOINC column name */
+	if (i < n_cols && dfield) {
+		mtr_t		mtr;
+		btr_pcur_t	pcur;
+
+		mtr_start(&mtr);
+
+		/* Open at the high/right end (FALSE), and INIT
+		cursor (TRUE) */
+		btr_pcur_open_at_index_side(
+			FALSE, index, BTR_SEARCH_LEAF, &pcur, TRUE, &mtr);
+
+		if (page_get_n_recs(btr_pcur_get_page(&pcur)) > 0) {
+			const rec_t*	rec;
+
+			rec = row_search_autoinc_get_rec(&pcur, &mtr);
+
+			if (rec != NULL) {
+				ibool unsigned_type = (
+					dfield->col->prtype & DATA_UNSIGNED);
+
+				*value = row_search_autoinc_read_column(
+					index, rec, i, unsigned_type);
+			}
+		}
+
+		btr_pcur_close(&pcur);
+
+		mtr_commit(&mtr);
+	} else {
+		error = DB_RECORD_NOT_FOUND;
+	}
+
+	return(error);
+}

storage/innobase/trx/trx0trx.c

@@ -195,6 +195,8 @@ trx_create(
 	memset(&trx->xid, 0, sizeof(trx->xid));
 	trx->xid.formatID = -1;
 
+	trx->n_autoinc_rows = 0;
+
 	trx_reset_new_rec_lock_info(trx);
 
 	return(trx);