sunjincheng121 commented on a change in pull request #8087:
[FLINK-12029][table] Add column operations for TableApi
URL: https://github.com/apache/flink/pull/8087#discussion_r276875059
##########
File path: docs/dev/table/functions.md
##########
@@ -5800,3 +5800,284 @@ For Table API, please use `_` for spaces (e.g.,
`DAY_TO_HOUR`).
| | `SQL_TSI_SECOND ` _(SQL-only)_ |
{% top %}
+
+Column Functions
+---------------------------------------
+
+The column functions are used to select or deselect table columns.
+
+| SYNTAX | DESC |
+| :--------------------- | :-------------------------- |
+| columns(...) | select the specified columns |
+| -columns(...) | deselect the columns specified |
Review comment:
`columns` -> `withColumns` and `-columns`->`withoutColumns`
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