[#2401] improvement(spark-connector): support alter namespace operation

[SteNicholas]

What changes were proposed in this pull request?

Support alter namespace operation implementation.

Why are the changes needed?

Support to set namespace properties in Spark sql like:

ALTER DATABASE inventory SET DBPROPERTIES ('Edited-by' = 'John', 'Edit-date' = '01/01/2001');

Fix: #2401

Does this PR introduce any user-facing change?

No.

How was this patch tested?

• SparkIT#testAlterSchema

[SteNicholas]

cc @FANNG1.

[FANNG1]

@SteNicholas thanks for your work, could you add related sql test in SparkIT? please refer to https://spark.apache.org/docs/latest/sql-ref-syntax-ddl-alter-database.html

[qqqttt123]

@SteNicholas Hi, maybe @PengleiShi is doing this issue, too. This issue has been assigned to him before your pull request.

[SteNicholas]

@FANNG1, I have added SparkIT#testAlterSchema to verify the alter namespace operation. PTAL.

[SteNicholas]

@FANNG1, I have addressed above comments. PTAL.

[FANNG1]

LGTM except one comment

[FANNG1]

@SteNicholas could you change the Spark SQL keyword to upper case? since #2437 is merged first.

[SteNicholas]

@FANNG1, I will update this pull request tonight and change the Spark SQL keyword to upper case.

[SteNicholas]

@FANNG1, I have addressed above comment and changed Spark SQL keyword to upper case. PTAL.

[FANNG1]

@FANNG1, I have addressed above comment and changed Spark SQL keyword to upper case. PTAL.

some minor comments, could you fix it?

[FANNG1]

merged to main, @SteNicholas thanks for your work!