add test

tests/script/general/db/show_create_db.sim

+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/cfg.sh -n dnode1 -c walLevel -v 0
+
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print =============== step2
+sql create database db
+sql show create database db
+
+if $rows != 1 then 
+  return -1
+endi
+
+print =============== step3
+sql use db
+sql show create database db
+
+if $rows != 1 then 
+  return -1
+endi
+
+if $data00 != db then 
+  return -1
+endi  
+
+sql drop database db
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT

tests/script/general/db/show_create_table.sim

+system sh/stop_dnodes.sh
+
+system sh/deploy.sh -n dnode1 -i 1
+system sh/cfg.sh -n dnode1 -c walLevel -v 0
+
+system sh/exec.sh -n dnode1 -s start
+sleep 3000
+sql connect
+
+print ===============create three type table
+sql create database db
+sql use db
+sql create table meters(ts timestamp, f binary(8)) tags(loc int, zone binary(8))
+sql create table t0 using meters tags(1,'ch')
+sql create table normalTbl(ts timestamp, zone binary(8))
+
+sql use db
+sql show create table meters 
+if $rows != 1 then 
+  return -1
+endi
+
+print ===============check sub table
+sql show create table t0
+if $rows != 1 then 
+  return -1
+endi
+if $data00 == 't0' then
+  return -1
+endi
+
+print ===============check normal table
+
+sql show create table normalTbl 
+if $rows != 1 then 
+  return -1
+endi
+
+if $data00 == 'normalTbl' then
+  return -1
+endi
+
+print ===============check super table
+sql show create table meters 
+if $rows != 1 then 
+  return -1
+endi
+
+if $data00 == 'meters' then
+  return -1
+endi
+
+print ===============check sub table with prefix
+
+sql show create table db.t0
+if $rows != 1 then 
+  return -1
+endi
+
+if $data00 == 't0' then
+  return -1
+endi
+
+print ===============check normal table with prefix
+sql show create table db.normalTbl 
+if $rows != 1 then 
+  return -1
+endi
+
+if $data00 == 'normalTbl' then
+  return -1
+endi
+
+
+print ===============check super table with prefix
+sql show create table db.meters 
+if $rows != 1 then 
+  return -1
+endi
+
+if $data00 == 'meters' then
+  return -1
+endi
+
+sql drop database db
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT