test: adjust case

tests/script/jenkins/basic.txt

@@ -7,7 +7,7 @@
 ./test.sh -f tsim/user/privilege_db.sim
 ./test.sh -f tsim/user/privilege_sysinfo.sim
 
-# ---- db
+# ---- db ----
 ./test.sh -f tsim/db/alter_option.sim
 # unsupport ./test.sh -f tsim/db/alter_replica_13.sim
 # unsupport ./test.sh -f tsim/db/alter_replica_31.sim

tests/script/tsim/db/basic6.sim

@@ -82,8 +82,6 @@ if $data26 != 21600m then
   return -1
 endi
 
-return
-
 print =============== step6
 $i = $i + 1
 while $i < 5
@@ -251,7 +249,7 @@ if $rows != 5 then
   return -1
 endi
 
-sql select * from $stb
+sql select * from $st
 if $rows != 5 then 
   return -1
 endi
@@ -306,7 +304,7 @@ if $rows != 5 then
   return -1
 endi
 
-sql select * from $stb
+sql select * from $st
 if $rows != 5 then 
   return -1
 endi