ZhangChaoming commented on a change in pull request #18386:
URL: https://github.com/apache/flink/pull/18386#discussion_r834917235
##########
File path:
flink-table/flink-sql-client/src/test/resources/sql/catalog_database.q
##########
@@ -106,6 +122,77 @@ show databases;
2 rows in set
!ok
+show databases in catalog1;
++---------------+
+| database name |
++---------------+
+| db1 |
+| db1_1 |
+| pre_db |
++---------------+
+3 rows in set
+!ok
+
+show databases from catalog1;
++---------------+
+| database name |
++---------------+
+| db1 |
+| db1_1 |
+| pre_db |
++---------------+
+3 rows in set
+!ok
+
+show databases from catalog1 like 'db1';
++---------------+
+| database name |
++---------------+
+| db1 |
++---------------+
+1 rows in set
+!ok
+
+show databases in catalog1 not like 'pre%';
++---------------+
+| database name |
++---------------+
+| db1 |
+| db1_1 |
++---------------+
+2 rows in set
+!ok
+
+show databases in catalog1 like '%db%';
++---------------+
+| database name |
++---------------+
+| db1 |
+| db1_1 |
+| pre_db |
++---------------+
+3 rows in set
+!ok
+
+show databases like 'db%';
++---------------+
+| database name |
++---------------+
+| db1 |
++---------------+
+1 rows in set
+!ok
+
+show databases in catalog1 like 'db%';
++---------------+
+| database name |
++---------------+
+| db1 |
+| db1_1 |
++---------------+
+2 rows in set
+!ok
+
Review comment:
Add an example:
```sql
show databases in catalog1 like '_re%';
+---------------+
| database name |
+---------------+
| pre_db |
+---------------+
1 rows in set
!ok
```
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