huaxingao commented on a change in pull request #35239:
URL: https://github.com/apache/spark/pull/35239#discussion_r793252862
##########
File path: docs/sql-ref-syntax-ddl-alter-table.md
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@@ -75,6 +75,50 @@ ALTER TABLE table_identifier ADD COLUMNS ( col_spec [ , ...
] )
Specifies the columns to be added.
+### DROP COLUMNS
+
+`ALTER TABLE DROP COLUMNS` statement drops mentioned columns from an existing
table.
+Note that this statement is only supported with v2 tables.
+
+
+#### Syntax
+
+```sql
+ALTER TABLE table_identifier DROP COLUMNS ( col_name1, ... )
+```
Review comment:
I just realized that previously we used `col_spec` for add column. I
think `col_name` is more accurate, because `col_spec` makes me think it is
column name + data type. Could you please check if other doc use `col_spec`
too? If yes, we probably want to use `col_spec` to be consistent.
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