test: add test case about create user

Author: flaneur2020

tests/logictest/suites/gen/05_ddl/05_0004_ddl_create_user

@@ -1,3 +1,15 @@
+statement ok
+DROP USER IF EXISTS 'test-a'@'localhost';
+
+statement ok
+DROP USER IF EXISTS 'test-b'@'localhost';
+
+statement ok
+DROP USER IF EXISTS 'test-c'@'localhost';
+
+statement ok
+DROP USER IF EXISTS 'test-d@localhost';
+
 statement ok
 CREATE USER 'test-a'@'localhost' IDENTIFIED BY 'password';
 

tests/logictest/suites/gen/05_ddl/05_0004_ddl_create_user_v2

@@ -13,6 +13,9 @@ DROP USER IF EXISTS 'test-c'@'localhost';
 statement ok
 DROP USER IF EXISTS 'test-d@localhost';
 
+statement ok
+DROP USER IF EXISTS 'test-e';
+
 statement ok
 CREATE USER 'test-a'@'localhost' IDENTIFIED BY 'password';
 
@@ -32,14 +35,22 @@ statement ok
 CREATE USER IF NOT EXISTS 'test-d@localhost' IDENTIFIED WITH sha256_password BY 'password';
 
 statement ok
-DROP USER 'test-a'@'localhost';
+CREATE USER IF NOT EXISTS 'test-e' IDENTIFIED BY '123' WITH DEFAULT_ROLE = 'role1';
+
+statement ok
+DROP USER IF EXISTS 'test-a'@'localhost';
+
+statement ok
+DROP USER IF EXISTS 'test-b'@'localhost';
 
 statement ok
-DROP USER 'test-b'@'localhost';
+DROP USER IF EXISTS 'test-c'@'localhost';
 
 statement ok
-DROP USER 'test-c'@'localhost';
+DROP USER IF EXISTS 'test-d@localhost';
 
 statement ok
-DROP USER 'test-d@localhost';
+DROP USER IF EXISTS 'test-d@localhost';
 
+statement ok
+DROP USER IF EXISTS 'test-e';

tests/logictest/suites/gen/05_ddl/05_0005_ddl_alter_user_v2

@@ -43,9 +43,6 @@ ALTER USER 'test-i@localhost' IDENTIFIED WITH sha256_password BY 'new-password';
 statement ok
 ALTER USER 'test-h'@'localhost' WITH DEFAULT_ROLE = 'role1';
 
-statement query I
-SELECT * FROM system.users;
-
 statement ok
 DROP USER IF EXISTS 'test-e'@'localhost';