bugfix: reset MODE_NO_BACKSLASH_ESCAPES during vcol parsing

mysql-test/r/func_like.result

@@ -262,3 +262,30 @@ select * from v1;
 'foo!' like 'foo!!'	'foo!' like 'foo!!' escape '!'
 0	1
 drop view v1;
+create table t1 (a varchar(100),
+b int default (a like '%f\\_'),
+c int default (a like '%f\\_' escape ''),
+d int default (a like '%f\\_' escape '\\'));
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `a` varchar(100) DEFAULT NULL,
+  `b` int(11) DEFAULT (`a` like '%f\\_'),
+  `c` int(11) DEFAULT (`a` like '%f\\_' escape ''),
+  `d` int(11) DEFAULT (`a` like '%f\\_' escape '\\')
+) ENGINE=MyISAM DEFAULT CHARSET=latin1
+insert t1 (a) values ('1 f_'), ('1 f\\_');
+set sql_mode=no_backslash_escapes;
+insert t1 (a) values ('2 f_'), ('2 f\_');
+flush tables;
+insert t1 (a) values ('3 f_'), ('3 f\_');
+set sql_mode=default;
+select * from t1;
+a	b	c	d
+1 f_	1	0	1
+1 f\_	0	1	0
+2 f_	1	0	1
+2 f\_	0	1	0
+3 f_	1	0	1
+3 f\_	0	1	0
+drop table t1;

mysql-test/t/func_like.test

@@ -193,3 +193,17 @@ create view v1 as select 'foo!' like 'foo!!', 'foo!' like 'foo!!' escape '!';
 show create view v1;
 select * from v1;
 drop view v1;
+
+create table t1 (a varchar(100),
+  b int default (a like '%f\\_'),
+  c int default (a like '%f\\_' escape ''),
+  d int default (a like '%f\\_' escape '\\'));
+show create table t1;
+insert t1 (a) values ('1 f_'), ('1 f\\_');
+set sql_mode=no_backslash_escapes;
+insert t1 (a) values ('2 f_'), ('2 f\_');
+flush tables;
+insert t1 (a) values ('3 f_'), ('3 f\_');
+set sql_mode=default;
+select * from t1;
+drop table t1;

sql/table.cc

@@ -995,6 +995,7 @@ bool parse_vcol_defs(THD *thd, MEM_ROOT *mem_root, TABLE *table,
   Field **vfield_ptr= table->vfield;
   Field **dfield_ptr= table->default_field;
   Virtual_column_info **check_constraint_ptr= table->check_constraints;
+  sql_mode_t saved_mode= thd->variables.sql_mode;
   Query_arena backup_arena;
   Virtual_column_info *vcol;
   StringBuffer<MAX_FIELD_WIDTH> expr_str;
@@ -1020,6 +1021,7 @@ bool parse_vcol_defs(THD *thd, MEM_ROOT *mem_root, TABLE *table,
   thd->stmt_arena= table->expr_arena;
   thd->update_charset(&my_charset_utf8mb4_general_ci, table->s->table_charset);
   expr_str.append(&parse_vcol_keyword);
+  thd->variables.sql_mode &= ~MODE_NO_BACKSLASH_ESCAPES;
 
   while (pos < end)
   {
@@ -1135,6 +1137,7 @@ bool parse_vcol_defs(THD *thd, MEM_ROOT *mem_root, TABLE *table,
   thd->stmt_arena= backup_stmt_arena_ptr;
   if (save_character_set_client)
     thd->update_charset(save_character_set_client, save_collation);
+  thd->variables.sql_mode= saved_mode;
   DBUG_RETURN(res);
 }