Github user wzhfy commented on a diff in the pull request:
https://github.com/apache/spark/pull/17649#discussion_r112630905
--- Diff:
sql/core/src/test/resources/sql-tests/results/describe-table-after-alter-table.sql.out
---
@@ -0,0 +1,162 @@
+-- Automatically generated by SQLQueryTestSuite
+-- Number of queries: 12
+
+
+-- !query 0
+CREATE TABLE table_with_comment (a STRING, b INT, c STRING, d STRING)
USING parquet COMMENT 'table_comment'
+-- !query 0 schema
+struct<>
+-- !query 0 output
+
+
+
+-- !query 1
+DESC formatted table_with_comment
+-- !query 1 schema
+struct<col_name:string,data_type:string,comment:string>
+-- !query 1 output
+# col_name data_type comment
+a string
+b int
+c string
+d string
+
+# Detailed Table Information
+Database default
+Table table_with_comment
+Created [not included in comparison]
+Last Access [not included in comparison]
+Type MANAGED
+Provider parquet
+Comment table_comment
+Location [not included in
comparison]sql/core/spark-warehouse/table_with_comment
+
+
+-- !query 2
+ALTER TABLE table_with_comment set tblproperties(comment = "modified
comment")
+-- !query 2 schema
+struct<>
+-- !query 2 output
+
+
+
+-- !query 3
+DESC formatted table_with_comment
+-- !query 3 schema
+struct<col_name:string,data_type:string,comment:string>
+-- !query 3 output
+# col_name data_type comment
+a string
+b int
+c string
+d string
+
+# Detailed Table Information
+Database default
+Table table_with_comment
+Created [not included in comparison]
+Last Access [not included in comparison]
+Type MANAGED
+Provider parquet
+Comment modified comment
+Properties [comment=modified comment]
--- End diff --
Comment string i.e. "modified comment" is in both `Properties` and
`Comment`?
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