EricJoy2048 commented on code in PR #6960:
URL: https://github.com/apache/seatunnel/pull/6960#discussion_r1634219198
##########
docs/en/transform-v2/filter.md:
##########
@@ -43,6 +48,21 @@ transform {
}
```
+Or we can delete the field named `age` by adding a `Filter` Transform with the
mode field set to `DELETE` like below:
+
+```
+transform {
+ Filter {
+ source_table_name = "fake"
+ result_table_name = "fake1"
+ fields = [age]
+ mode = "DELETE"
+ }
Review Comment:
> If we rename the original field named `fields` to `include_fields`, this
PR will cause Seatunnel to lose backward compatibility. All users will be
required to update the already existing config files; otherwise, the original
config file won't work properly. I guess it's not acceptable? @hailin0
If we update the config option name and want to be compatible with old
option names, we can use `withFallbackKeys` . Here is a example in class
`MongodbConfig`:
```
public static final Option<String> MATCH_QUERY =
Options.key("match.query")
.stringType()
.noDefaultValue()
.withDescription("Mongodb's query syntax.")
.withFallbackKeys("matchQuery");
```
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