select multiple information functions will get wrong result

[silverbullet233]

Steps to reproduce the behavior (Required)

mysql>   select current_user(),database(),connection_id();
+----------------+------------+-----------------+
| CURRENT_USER() | DATABASE() | CONNECTION_ID() |
+----------------+------------+-----------------+
| tpch_1g        | tpch_1g    |        16777217 |
+----------------+------------+-----------------+
1 row in set (0.01 sec)

Expected behavior (Required)

mysql>   select current_user(),database(),connection_id();
+----------------+------------+-----------------+
| CURRENT_USER() | DATABASE() | CONNECTION_ID() |
+----------------+------------+-----------------+
| 'root'@'%'     | tpch_1g    |        16777217 |
+----------------+------------+-----------------+
1 row in set (0.00 sec)

Real behavior (Required)

StarRocks version (Required)

• You can get the StarRocks version by executing SQL select current_version()

[github-actions]

We have marked this issue as stale because it has been inactive for 6 months. If this issue is still relevant, removing the stale label or adding a comment will keep it active. Otherwise, we'll close it in 10 days to keep the issue queue tidy. Thank you for your contribution to StarRocks!