Introduce the dtuple_t::info_bits constant REC_INFO_DEFAULT_ROW

storage/innobase/handler/handler0alter.cc

@@ -4347,7 +4347,7 @@ innobase_add_instant_try(
 	pars_info_add_int4_literal(info, "id", user_table->id);
 
 	dtuple_t* entry = row_build_index_entry(row, NULL, index, ctx->heap);
-	entry->info_bits = REC_INFO_MIN_REC_FLAG | REC_STATUS_COLUMNS_ADDED;
+	entry->info_bits = REC_INFO_DEFAULT_ROW;
 
 	dberr_t err = que_eval_sql(
 		info,

storage/innobase/include/rem0rec.h

@@ -70,6 +70,11 @@ enum rec_comp_status_t {
 	REC_STATUS_COLUMNS_ADDED = 4
 };
 
+/** The dtuple_t::info_bits of the 'default row' record.
+@see rec_is_default_row() */
+static const byte REC_INFO_DEFAULT_ROW
+	= REC_INFO_MIN_REC_FLAG | REC_STATUS_COLUMNS_ADDED;
+
 #define REC_NEW_STATUS		3	/* This is single byte bit-field */
 #define REC_NEW_STATUS_MASK	0x7UL
 #define REC_NEW_STATUS_SHIFT	0

storage/innobase/row/row0ins.cc

@@ -2634,8 +2634,7 @@ row_ins_clust_index_entry_low(
 #endif /* UNIV_DEBUG */
 
 	if (entry->info_bits) {
-		ut_ad(entry->info_bits
-		      == (REC_INFO_MIN_REC_FLAG | REC_STATUS_COLUMNS_ADDED));
+		ut_ad(entry->info_bits == REC_INFO_DEFAULT_ROW);
 		ut_ad(flags == BTR_NO_LOCKING_FLAG);
 		ut_ad(index->is_instant());
 		ut_ad(!dict_index_is_online_ddl(index));

storage/innobase/trx/trx0rec.cc

@@ -500,8 +500,7 @@ trx_undo_page_report_insert(
 	/* Store then the fields required to uniquely determine the record
 	to be inserted in the clustered index */
 	if (UNIV_UNLIKELY(clust_entry->info_bits)) {
-		ut_ad(clust_entry->info_bits
-		      == (REC_INFO_MIN_REC_FLAG | REC_STATUS_COLUMNS_ADDED));
+		ut_ad(clust_entry->info_bits == REC_INFO_DEFAULT_ROW);
 		ut_ad(index->is_instant());
 		ut_ad(undo_page[first_free + 2] == TRX_UNDO_INSERT_REC);
 		undo_page[first_free + 2] = TRX_UNDO_INSERT_DEFAULT;
@@ -1900,8 +1899,7 @@ trx_undo_report_row_operation(
 		ut_ad(!trx->read_only);
 		ut_ad(trx->id);
 		if (UNIV_LIKELY(!clust_entry || clust_entry->info_bits
-				!= (REC_INFO_MIN_REC_FLAG
-				    | REC_STATUS_COLUMNS_ADDED))) {
+				!= REC_INFO_DEFAULT_ROW)) {
 			/* Keep INFORMATION_SCHEMA.TABLES.UPDATE_TIME
 			up-to-date for persistent tables outside
 			instant ADD COLUMN. */