Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/16422#discussion_r138524974
--- Diff:
sql/core/src/test/resources/sql-tests/inputs/describe-table-column.sql ---
@@ -0,0 +1,35 @@
+-- Test temp table
+CREATE TEMPORARY VIEW desc_col_temp_table (key int COMMENT
'column_comment') USING PARQUET;
+
+DESC desc_col_temp_table key;
+
+DESC EXTENDED desc_col_temp_table key;
+
+DESC FORMATTED desc_col_temp_table key;
+
+-- Describe a column with qualified name
+DESC FORMATTED desc_col_temp_table desc_col_temp_table.key;
+
+-- Describe a non-existent column
+DESC desc_col_temp_table key1;
+
+-- Test persistent table
+CREATE TABLE desc_col_table (key int COMMENT 'column_comment') USING
PARQUET;
--- End diff --
shall we drop these testing tables at the end?
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