justinmclean opened a new issue, #7635:
URL: https://github.com/apache/gravitino/issues/7635
### What would you like to be improved?
In api/src/main/java/org/apache/gravitino/Namespace.java fromString method
checks can be added to see if the namespace starts with a dot or contains a
double dot.
### How should we improve?
Add:
```
Preconditions.checkArgument(!namespace.startsWith("."), "Cannot create a
namespace starting with a dot");
Preconditions.checkArgument(!namespace.contains(".."), "Cannot create a
namespace with an empty level");
```
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