Github user sujith71955 commented on a diff in the pull request:
https://github.com/apache/spark/pull/17649#discussion_r111696709
--- Diff:
sql/core/src/test/resources/sql-tests/inputs/describe_tbleproperty_validation.sql
---
@@ -0,0 +1,24 @@
+CREATE TABLE table_with_comment (a STRING, b INT) COMMENT 'actual comment';
+
+DESC formatted table_with_comment;
+
+-- ALTER TABLE BY MODIFYING COMMENT
+ALTER TABLE table_with_comment set tblproperties(comment = "modified
comment");
+
+DESC formatted table_with_comment;
+
+-- DROP TEST TABLE
+DROP TABLE table_with_comment;
+
+-- CREATE TABLE WITHOUT COMMENT
+CREATE TABLE table_comment (a STRING, b INT);
+
+DESC formatted table_comment;
+
+-- ALTER TABLE BY ADDING COMMENT
+ALTER TABLE table_comment set tblproperties(comment = "added comment");
+
+DESC formatted table_comment;
+
+-- DROP TEST TABLE
+DROP TABLE table_comment;
--- End diff --
sure, i will add a new jira for this problem and i will update the test
suite name as per the suggestion, as you suggested i will also verify ALTER
TABLE UNSET .
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