InnoDB: Improve performance by about 10% by removing implicit

memcpy() calls, by not initializing the offsets_[] arrays.
InnoDB: Remove a Microsoft compiler warning in page0page.c.


innobase/btr/btr0btr.c:
  Only initialize the first element of offsets_[]
innobase/btr/btr0cur.c:
  Only initialize the first element of offsets_[]
innobase/btr/btr0sea.c:
  Only initialize the first element of offsets_[]
innobase/lock/lock0lock.c:
  Only initialize the first element of offsets_[]
innobase/page/page0cur.c:
  Only initialize the first element of offsets_[]
innobase/page/page0page.c:
  page_validate(): Silence a warning about unsigned/signed comparison.
  Other places: Only initialize the first element of offsets_[].
innobase/rem/rem0rec.c:
  Only initialize the first element of offsets_[]
innobase/row/row0ins.c:
  Only initialize the first element of offsets_[]
innobase/row/row0mysql.c:
  Only initialize the first element of offsets_[]
innobase/row/row0purge.c:
  Only initialize the first element of offsets_[]
innobase/row/row0row.c:
  Only initialize the first element of offsets_[]
innobase/row/row0sel.c:
  Only initialize the first element of offsets_[]
innobase/row/row0undo.c:
  Only initialize the first element of offsets_[]
innobase/row/row0upd.c:
  Only initialize the first element of offsets_[]
innobase/trx/trx0rec.c:
  Only initialize the first element of offsets_[]

innobase/btr/btr0btr.c

@@ -567,8 +567,9 @@ btr_page_get_father_for_rec(
 	btr_cur_t	cursor;
 	rec_t*		node_ptr;
 	dict_index_t*	index;
-	ulint		offsets_[100] = { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets	= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(mtr_memo_contains(mtr, dict_tree_get_lock(tree),
 							MTR_MEMO_X_LOCK));
@@ -2098,7 +2099,8 @@ btr_compress(
 		btr_node_ptr_delete(tree, page, mtr);
 	} else {
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
+		ulint		offsets_[100];
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 		/* Replace the address of the old child node (= page) with the 
 		address of the merge page to the right */
 
@@ -2387,9 +2389,9 @@ btr_print_tree(
 	mtr_t		mtr;
 	page_t*		root;
 	mem_heap_t*	heap	= NULL;
-	ulint		offsets_[100]
-				= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets	= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	fputs("--------------------------\n"
 		"INDEX TREE PRINT\n", stderr);
@@ -2489,9 +2491,9 @@ btr_index_rec_validate(
 	ulint		i;
 	page_t*		page;
 	mem_heap_t*	heap	= NULL;
-	ulint		offsets_[100]
-				= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets	= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	page = buf_frame_align(rec);
 	

innobase/btr/btr0cur.c

@@ -275,8 +275,9 @@ btr_cur_search_to_nth_level(
 	btr_search_t*	info;
 #endif
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 	/* Currently, PAGE_CUR_LE is the only search mode used for searches
 	ending to upper levels */
 
@@ -578,8 +579,9 @@ btr_cur_open_at_index_side(
 	ulint		estimate;
 	ulint           savepoint;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	estimate = latch_mode & BTR_ESTIMATE;
 	latch_mode = latch_mode & ~BTR_ESTIMATE;
@@ -703,8 +705,9 @@ btr_cur_open_at_rnd_pos(
 	ulint		height;
 	rec_t*		node_ptr;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	tree = index->tree;
 	
@@ -1252,7 +1255,9 @@ btr_cur_upd_lock_and_undo(
 
 	if (!(flags & BTR_NO_LOCKING_FLAG)) {
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
+		ulint		offsets_[100];
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
 		err = lock_clust_rec_modify_check_and_lock(flags, rec, index,
 			rec_get_offsets(rec, index, offsets_,
 				ULINT_UNDEFINED, &heap), thr);
@@ -1426,8 +1431,9 @@ btr_cur_update_in_place(
 	trx_t*		trx;
 	ibool		was_delete_marked;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	rec = btr_cur_get_rec(cursor);
 	index = cursor->index;
@@ -2065,7 +2071,9 @@ btr_cur_parse_del_mark_set_clust_rec(
 	
 		if (!(flags & BTR_KEEP_SYS_FLAG)) {
 			mem_heap_t*	heap		= NULL;
-			ulint		offsets_[100]	= { 100, };
+			ulint		offsets_[100];
+			*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
 			row_upd_rec_sys_fields_in_recovery(rec,
 					rec_get_offsets(rec, index, offsets_,
 					ULINT_UNDEFINED, &heap),
@@ -2109,8 +2117,9 @@ btr_cur_del_mark_set_clust_rec(
 	rec_t*		rec;
 	trx_t*		trx;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	rec = btr_cur_get_rec(cursor);
 	index = cursor->index;
@@ -2399,9 +2408,10 @@ btr_cur_optimistic_delete(
 	ulint		max_ins_size;
 	rec_t*		rec;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
 	ibool		no_compress_needed;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(mtr_memo_contains(mtr, buf_block_align(btr_cur_get_page(cursor)),
 							MTR_MEMO_PAGE_X_FIX));
@@ -2803,10 +2813,12 @@ btr_estimate_number_of_different_key_vals(
 	ulint		add_on;
 	mtr_t		mtr;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets1_[100]	= { 100, };
-	ulint		offsets2_[100]	= { 100, };
+	ulint		offsets1_[100];
+	ulint		offsets2_[100];
 	ulint*		offsets1	= offsets1_;
 	ulint*		offsets2	= offsets2_;
+	*offsets1_ = (sizeof offsets1_) / sizeof *offsets1_;
+	*offsets2_ = (sizeof offsets2_) / sizeof *offsets2_;
 
 	n_cols = dict_index_get_n_unique(index);
 

innobase/btr/btr0sea.c

@@ -420,7 +420,8 @@ btr_search_update_hash_ref(
 	    && (block->curr_n_bytes == info->n_bytes)
 	    && (block->curr_side == info->side)) {
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
+		ulint		offsets_[100];
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	    	rec = btr_cur_get_rec(cursor);
 
@@ -552,9 +553,10 @@ btr_search_check_guess(
 	ulint		bytes;
 	int		cmp;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
 	ibool		success		= FALSE;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	n_unique = dict_index_get_n_unique_in_tree(cursor->index);
 	
@@ -1098,8 +1100,9 @@ btr_search_build_page_hash_index(
 	rec_t**		recs;
 	ulint		i;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(index);
 
@@ -1341,8 +1344,9 @@ btr_search_update_hash_on_delete(
 	ulint		fold;
 	dulint		tree_id;
 	ibool		found;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	mem_heap_t*	heap		= NULL;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	rec = btr_cur_get_rec(cursor);
 
@@ -1452,8 +1456,9 @@ btr_search_update_hash_on_insert(
 	ulint		side;
 	ibool		locked		= FALSE;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	table = btr_search_sys->hash_index;
 
@@ -1591,8 +1596,9 @@ btr_search_validate(void)
 	ibool		ok		= TRUE;
 	ulint		i;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 	
 	rw_lock_x_lock(&btr_search_latch);
 

innobase/lock/lock0lock.c

@@ -4094,8 +4094,9 @@ lock_rec_print(
 	ulint		i;
 	mtr_t		mtr;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(mutex_own(&kernel_mutex));
@@ -4592,8 +4593,9 @@ lock_rec_validate_page(
 	ulint	i;
 	mtr_t	mtr;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 #ifdef UNIV_SYNC_DEBUG
 	ut_ad(!mutex_own(&kernel_mutex));
@@ -4841,9 +4843,11 @@ lock_rec_insert_check_and_lock(
 #ifdef UNIV_DEBUG
 	{
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
-		const ulint*	offsets		= rec_get_offsets(
-						next_rec, index, offsets_,
+		ulint		offsets_[100];
+		const ulint*	offsets;
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
+		offsets = rec_get_offsets(next_rec, index, offsets_,
 						ULINT_UNDEFINED, &heap);
 		ut_ad(lock_rec_queue_validate(next_rec, index, offsets));
 		if (heap) {
@@ -4988,9 +4992,12 @@ lock_sec_rec_modify_check_and_lock(
 #ifdef UNIV_DEBUG
 	{
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
-		const ulint*	offsets		= rec_get_offsets(
-			rec, index, offsets_, ULINT_UNDEFINED, &heap);
+		ulint		offsets_[100];
+		const ulint*	offsets;
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
+		offsets = rec_get_offsets(rec, index, offsets_,
+						ULINT_UNDEFINED, &heap);
 		ut_ad(lock_rec_queue_validate(rec, index, offsets));
 		if (heap) {
 			mem_heap_free(heap);
@@ -5159,9 +5166,10 @@ lock_clust_rec_read_check_and_lock_alt(
 	que_thr_t*	thr)	/* in: query thread */
 {
 	mem_heap_t*	tmp_heap	= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
 	ulint		ret;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	offsets = rec_get_offsets(rec, index, offsets,
 						ULINT_UNDEFINED, &tmp_heap);

innobase/page/page0cur.c

@@ -59,8 +59,10 @@ page_cur_try_search_shortcut(
 #endif
 	ibool		success		= FALSE;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
 	ut_ad(dtuple_check_typed(tuple));
 
 	rec = page_header_get_ptr(page, PAGE_LAST_INSERT);
@@ -229,8 +231,9 @@ page_cur_search_with_match(
 	ulint	dbg_matched_bytes;
 #endif
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(page && tuple && iup_matched_fields && iup_matched_bytes
 	      && ilow_matched_fields && ilow_matched_bytes && cursor);
@@ -517,12 +520,15 @@ page_cur_insert_rec_write_log(
 
 	{
 		mem_heap_t*	heap		= NULL;
-		ulint		cur_offs_[100]	= { 100, };
-		ulint		ins_offs_[100]	= { 100, };
+		ulint		cur_offs_[100];
+		ulint		ins_offs_[100];
 
 		ulint*		cur_offs;
 		ulint*		ins_offs;
 
+		*cur_offs_ = (sizeof cur_offs_) / sizeof *cur_offs_;
+		*ins_offs_ = (sizeof ins_offs_) / sizeof *ins_offs_;
+
 		cur_offs = rec_get_offsets(cursor_rec, index, cur_offs_,
 						ULINT_UNDEFINED, &heap);
 		ins_offs = rec_get_offsets(insert_rec, index, ins_offs_,
@@ -671,8 +677,9 @@ page_cur_parse_insert_rec(
 	ulint	info_and_status_bits = 0; /* remove warning */
 	page_cur_t cursor;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	if (!is_short) {
 		/* Read the cursor rec offset as a 2-byte ulint */
@@ -1079,8 +1086,9 @@ page_copy_rec_list_end_to_created_page(
 	ulint	log_data_len;
 	ibool		comp		= page_is_comp(page);
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 	
 	ut_ad(page_dir_get_n_heap(new_page) == 2);
 	ut_ad(page != new_page);
@@ -1268,8 +1276,9 @@ page_cur_parse_delete_rec(
 
 	if (page) {
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
+		ulint		offsets_[100];
 		rec_t*		rec		= page + offset;
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 		page_cur_position(rec, &cursor);
 

innobase/page/page0page.c

@@ -232,8 +232,9 @@ page_mem_alloc(
 
 	if (rec) {
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
+		ulint		offsets_[100];
 		ulint*		offsets		= offsets_;
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 		offsets = rec_get_offsets(rec, index, offsets,
 						ULINT_UNDEFINED, &heap);
@@ -466,8 +467,9 @@ page_copy_rec_list_end_no_locks(
 	page_cur_t	cur2;
 	rec_t*		sup;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	page_cur_position(rec, &cur1);
 
@@ -566,8 +568,9 @@ page_copy_rec_list_start(
 	page_cur_t	cur2;
 	rec_t*		old_end;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	page_cur_set_before_first(page, &cur1);
 
@@ -747,8 +750,9 @@ page_delete_rec_list_end(
 
 	if ((size == ULINT_UNDEFINED) || (n_recs == ULINT_UNDEFINED)) {
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
+		ulint		offsets_[100];
 		ulint*		offsets		= offsets_;
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 		/* Calculate the sum of sizes and the number of records */
 		size = 0;
 		n_recs = 0;
@@ -831,10 +835,11 @@ page_delete_rec_list_start(
 {
 	page_cur_t	cur1;
 	ulint		log_mode;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
 	mem_heap_t*	heap		= NULL;
 	byte		type;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	if (index->table->comp) {
 		type = MLOG_COMP_LIST_START_DELETE;
@@ -1326,8 +1331,9 @@ page_print_list(
 	ulint		count;
 	ulint		n_recs;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_a(page_is_comp(page) == index->table->comp);
 
@@ -1776,7 +1782,8 @@ page_validate(
 
 		if (comp && page_rec_is_user_rec(rec)
 				&& rec_get_node_ptr_flag(rec)
-				== !btr_page_get_level_low(page)) {
+				!= (ibool)
+				(btr_page_get_level_low(page) != 0)) {
 			fputs("InnoDB: node_ptr flag mismatch\n", stderr);
 			goto func_exit;
 		}

innobase/rem/rem0rec.c

@@ -958,9 +958,11 @@ rec_convert_dtuple_to_rec(
 #ifdef UNIV_DEBUG
 	{
 		mem_heap_t*	heap	= NULL;
-		ulint		offsets_[100 + REC_OFFS_HEADER_SIZE]
-					= { 100, };
-		const ulint*	offsets	= rec_get_offsets(rec, index,
+		ulint		offsets_[100];
+		const ulint*	offsets;
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
+		offsets = rec_get_offsets(rec, index,
 					offsets_, ULINT_UNDEFINED, &heap);
 		ut_ad(rec_validate(rec, offsets));
 		if (heap) {
@@ -989,9 +991,9 @@ rec_copy_prefix_to_dtuple(
 	ulint		len;
 	byte*		buf = NULL;
 	ulint		i;
-	ulint		offsets_[100 + REC_OFFS_HEADER_SIZE]
-				= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets	= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	offsets = rec_get_offsets(rec, index, offsets, n_fields, &heap);
 
@@ -1405,8 +1407,9 @@ rec_print(
 		return;
 	} else {
 		mem_heap_t*	heap	= NULL;
-		ulint		offsets_[100 + REC_OFFS_HEADER_SIZE]
-					= { 100, };
+		ulint		offsets_[100];
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
 		rec_print_new(file, rec, rec_get_offsets(rec, index, offsets_,
 						ULINT_UNDEFINED, &heap));
 		if (heap) {

innobase/row/row0ins.c

@@ -1134,8 +1134,9 @@ row_ins_check_foreign_constraint(
 	mtr_t		mtr;
 	trx_t*		trx		= thr_get_trx(thr);
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 run_again:
 #ifdef UNIV_SYNC_DEBUG
@@ -1558,8 +1559,9 @@ row_ins_scan_sec_index_for_duplicate(
 	mtr_t		mtr;
 	trx_t*		trx;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	n_unique = dict_index_get_n_unique(index);
 
@@ -1695,9 +1697,9 @@ row_ins_duplicate_error_in_clust(
 	ulint	n_unique;
 	trx_t*	trx		= thr_get_trx(thr);
 	mem_heap_t*heap		= NULL;
-	ulint	offsets_[100]	= { 100, };
+	ulint	offsets_[100];
 	ulint*	offsets		= offsets_;
-
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	UT_NOT_USED(mtr);
 	
@@ -1897,9 +1899,10 @@ row_ins_index_entry_low(
 	big_rec_t*	big_rec			= NULL;
 	mtr_t		mtr;
 	mem_heap_t*	heap			= NULL;
-	ulint		offsets_[100]		= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets			= offsets_;
-	
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
 	log_free_check();
 
 	mtr_start(&mtr);

innobase/row/row0mysql.c

@@ -3673,8 +3673,9 @@ row_scan_and_check_index(
 	ibool		contains_null;
 	ulint		i;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	*n_rows = 0;
 	

innobase/row/row0purge.c

@@ -101,7 +101,8 @@ row_purge_remove_clust_if_poss_low(
 	mtr_t		mtr;
 	rec_t*		rec;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	index = dict_table_get_first_index(node->table);
 	

innobase/row/row0row.c

@@ -203,7 +203,8 @@ row_build(
 	byte*		buf; 
 	ulint		i;
 	mem_heap_t*	tmp_heap	= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(index && rec && heap);
 	ut_ad(index->type & DICT_CLUSTERED);
@@ -296,8 +297,9 @@ row_rec_to_index_entry(
 	ulint		rec_len;
 	byte*		buf;
 	mem_heap_t*	tmp_heap	= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(rec && heap && index);
 	
@@ -377,8 +379,9 @@ row_build_row_ref(
 	ulint		clust_col_prefix_len;
 	ulint		i;
 	mem_heap_t*	tmp_heap	= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(index && rec && heap);
 
@@ -470,8 +473,9 @@ row_build_row_ref_in_tuple(
 	ulint		clust_col_prefix_len;
 	ulint		i;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_a(ref && index && rec);
 	

innobase/row/row0sel.c

@@ -79,14 +79,15 @@ row_sel_sec_rec_is_for_clust_rec(
         ulint           i;
 	dtype_t*	cur_type;
 	mem_heap_t*	heap		= NULL;
-	ulint		clust_offsets_[100]
-					= { 100, };
-	ulint		sec_offsets_[10]
-					= { 10, };
+	ulint		clust_offsets_[100];
+	ulint		sec_offsets_[10];
 	ulint*		clust_offs	= clust_offsets_;
 	ulint*		sec_offs	= sec_offsets_;
 	ibool		is_equal	= TRUE;
 
+	*clust_offsets_ = (sizeof clust_offsets_) / sizeof *clust_offsets_;
+	*sec_offsets_ = (sizeof sec_offsets_) / sizeof *sec_offsets_;
+
 	clust_offs = rec_get_offsets(clust_rec, clust_index, clust_offs,
 						ULINT_UNDEFINED, &heap);
 	sec_offs = rec_get_offsets(sec_rec, sec_index, sec_offs,
@@ -625,8 +626,9 @@ row_sel_get_clust_rec(
 	rec_t*		old_vers;
 	ulint		err;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	offsets = rec_get_offsets(rec,
 				btr_pcur_get_btr_cur(&plan->pcur)->index,
@@ -990,9 +992,10 @@ row_sel_try_search_shortcut(
 	dict_index_t*	index;
 	rec_t*		rec;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
 	ulint		ret;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	index = plan->index;
 
@@ -1115,8 +1118,9 @@ row_sel(
 	ulint		found_flag;
 	ulint		err;
 	mem_heap_t*	heap				= NULL;
-	ulint		offsets_[100]			= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets				= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(thr->run_node == node);
 
@@ -3035,9 +3039,10 @@ row_search_for_mysql(
 	ulint		next_offs;
 	mtr_t		mtr;
 	mem_heap_t*	heap				= NULL;
-	ulint		offsets_[100]			= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets				= offsets_;
-	
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
 	ut_ad(index && pcur && search_tuple);
 	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
 

innobase/row/row0undo.c

@@ -152,8 +152,9 @@ row_undo_search_clust_to_pcur(
 	ibool		ret;
 	rec_t*		rec;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	mtr_start(&mtr);
 

innobase/row/row0upd.c

@@ -706,8 +706,9 @@ row_upd_build_sec_rec_difference_binary(
 	upd_t*		update;
 	ulint		n_diff;
 	ulint		i;
-	ulint		offsets_[10]	= { 10, };
+	ulint		offsets_[10];
 	const ulint*	offsets;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	/* This function is used only for a secondary index */
 	ut_a(0 == (index->type & DICT_CLUSTERED));
@@ -783,8 +784,9 @@ row_upd_build_difference_binary(
 	ulint		trx_id_pos;
 	ibool		extern_bit;
 	ulint		i;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	const ulint*	offsets;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	/* This function is used only for a clustered index */
 	ut_a(index->type & DICT_CLUSTERED);
@@ -1193,8 +1195,9 @@ row_upd_store_row(
 	upd_t*		update;
 	rec_t*		rec;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	const ulint*	offsets;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(node->pcur->latch_mode != BTR_NO_LATCHES);
 
@@ -1393,7 +1396,8 @@ row_upd_clust_rec_by_insert(
 	btr_cur	= btr_pcur_get_btr_cur(pcur);
 	
 	if (node->state != UPD_NODE_INSERT_CLUSTERED) {
-		ulint	offsets_[100]	= { 100, };
+		ulint	offsets_[100];
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 		err = btr_cur_del_mark_set_clust_rec(BTR_NO_LOCKING_FLAG,
 						btr_cur, TRUE, thr, mtr);
@@ -1533,8 +1537,10 @@ row_upd_clust_rec(
 
 	if (err == DB_SUCCESS && big_rec) {
 		mem_heap_t*	heap		= NULL;
-		ulint		offsets_[100]	= { 100, };
+		ulint		offsets_[100];
 		rec_t*		rec;
+		*offsets_ = (sizeof offsets_) / sizeof *offsets_;
+
 		mtr_start(mtr);
 
 		ut_a(btr_pcur_restore_position(BTR_MODIFY_TREE, pcur, mtr));
@@ -1631,8 +1637,9 @@ row_upd_clust_step(
 	mtr_t		mtr_buf;
 	rec_t*		rec;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	const ulint*	offsets;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	index = dict_table_get_first_index(node->table);
 
@@ -1988,7 +1995,8 @@ row_upd_in_place_in_select(
 	btr_cur_t*	btr_cur;
 	ulint		err;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_ad(sel_node->select_will_do_update);
 	ut_ad(sel_node->latch_mode == BTR_MODIFY_LEAF);

innobase/trx/trx0rec.c

@@ -1016,8 +1016,9 @@ trx_undo_report_row_operation(
 	trx_rseg_t*	rseg;
 	mtr_t		mtr;
 	mem_heap_t*	heap		= NULL;
-	ulint		offsets_[100]	= { 100, };
+	ulint		offsets_[100];
 	ulint*		offsets		= offsets_;
+	*offsets_ = (sizeof offsets_) / sizeof *offsets_;
 
 	ut_a(index->type & DICT_CLUSTERED);