sp; 0x04 0x05 0x06 0x07
0x258b008 : 0x08 0x09 0x0a 0x0b 0x0c 0x0d 0x0e 0x0f
0x258b010 : 0x10 0x11 0x12 0x13 0x14 0x15 0x16 0x17
0x258b018 : 0x18 0x19 0x1a 0x1b 0x1c 0x1d 0x1e 0x1f
0x258b020 : 0x20 0x21 0x22 0x23 0x24 0x25 0x26 0x27
0x258b028 : 0x28 0x29 0x2a 0x2b 0x2c 0x2d 0x2e 0x2f
0x258b030 : 0x30 0x31 0x32 0x33 0x34 0x35 0x36 0x37
0x258b038 : 0x38 0x39 0x3a 0x3b 0x3c 0x3d 0x3e 0x3f
0x258b040 : 0x40 0x41 0x42 0x43 0x44 0x45 0x46 0x47
0x258b048 : 0x48 0x49 0x4a 0x4b 0x4c 0x4d 0x4e 0x4f
0x258b050 : 0x50 0x51 0x52 0x53 0x54 0x55 0x56 0x57
0x258b058 : 0x58 0x59 0x5a 0x5b 0x5c 0x5d 0x5e 0x5f
0x258b060 : 0x60 0x41 0x42 0x43 0x44 0x45 0x46 0x47
0x258b068 : 0x48 0x49 0x4a 0x4b 0x4c 0x4d 0x4e 0x4f
0x258b070 : 0x50 0x51 0x52 0x53 0x54 0x55 0x56 0x57
0x258b078 : 0x58 0x59 0x5a 0x7b 0x7c 0x7d 0x7e 0x7f
而从内存的地址0x258b000我们也能看到他确实是存在于堆内存空间中，它是一片堆内存区域。
下面是varchar比较的调用栈帧以备后用
#0 my_strnncollsp_simple (cs=0x2d4b9c0, a=0x7fff57a71f93 "gaopeng", a_length=7, b=0x7fffbd7e807f "gaopeng", b_length=7, diff_if_only_endspace_difference=0 '\000')
at /root/mysql5.7.14/percona-server-5.7.14-7/strings/ctype-simple.c:165
#1 0x0000000001ab8ec2 in cmp_whole_field (mtype=1, prtype=524303, a=0x7fff57a71f93 "gaopeng", a_length=7, b=0x7fffbd7e807f "gaopeng", b_length=7)
at /root/mysql5.7.14/percona-server-5.7.14-7/storage/innobase/rem/rem0cmp.cc:374
#2 0x0000000001aba827 in cmp_data (mtype=1, prtype=524303, data1=0x7fff57a71f93 "gaopeng", len1=7, data2=0x7fffbd7e807f "gaopeng", len2=7)
at /root/mysql5.7.14/percona-server-5.7.14-7/storage/in