godfreyhe commented on a change in pull request #12502:
URL: https://github.com/apache/flink/pull/12502#discussion_r436439900
##########
File path: docs/dev/table/sql/queries.zh.md
##########
@@ -313,9 +313,29 @@ SHOW DATABASES;
<p>显示当前数据库、Catalog中的所有表</p>
{% highlight sql %}
SHOW TABLES;
+{% endhighlight %}
+ <p>显示当前数据库、Catalog中的所有视图</p>
+{% highlight sql %}
+SHOW VIEWS;
{% endhighlight %}
</td>
</tr>
+ <tr>
+ <td>
+ <strong>Describe</strong><br>
+ <span class="label label-primary">批处理</span> <span class="label
label-primary">流处理</span>
+ </td>
+ <td>
+ <p>描述给定表的元数据.</p>
Review comment:
currently, only support describing table schema
##########
File path: docs/dev/table/sql/drop.md
##########
@@ -143,6 +144,22 @@ Dropping a non-empty database triggers an exception.
Enabled by default.
Dropping a non-empty database also drops all associated tables and functions.
+## DROP VIEW
+
+{% highlight sql %}
+DROP [TEMPORARY] VIEW [ IF EXISTS ] view_name
+{% endhighlight %}
+
+Drop a view that has catalog and database namespaces. If the view to drop does
not exist, an exception is thrown.
+
+**IF EXISTS**
+
+If the view does not exist, nothing happens.
+
+**TEMPORARY**
Review comment:
move this section to the front of **IF EXISTS**
##########
File path: docs/dev/table/sql/drop.zh.md
##########
@@ -143,6 +144,22 @@ DROP DATABASE [IF EXISTS] [catalog_name.]db_name [
(RESTRICT | CASCADE) ]
删除一个非空数据库时，把相关联的表与函数一并删除。
+## DROP VIEW
+
+{% highlight sql %}
+DROP [TEMPORARY] VIEW [ IF EXISTS ] view_name
+{% endhighlight %}
+
+删除一个有 catalog 和数据库命名空间的视图。若需要删除的视图不存在，则会产生异常。
+
+**IF EXISTS**
+
+若视图不存在，则不会进行任何操作。
+
+**TEMPORARY**
Review comment:
ditto
##########
File path: docs/dev/table/sql/queries.md
##########
@@ -313,9 +313,29 @@ SHOW DATABASES;
<p>Show all tables in the current database in the current
catalog</p>
{% highlight sql %}
SHOW TABLES;
+{% endhighlight %}
+ <p>Show all views in the current database in the current catalog</p>
+{% highlight sql %}
+SHOW VIEWS;
{% endhighlight %}
</td>
</tr>
+ <tr>
+ <td>
+ <strong>Describe</strong><br>
+ <span class="label label-primary">Batch</span> <span class="label
label-primary">Streaming</span>
+ </td>
+ <td>
+ <p>Describe the given table.</p>
Review comment:
explain more about `Describe` operation ? such as `Describe the schema
of the given table.`
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