ruanwenjun commented on code in PR #1958:
URL:
https://github.com/apache/incubator-seatunnel/pull/1958#discussion_r896331830
##########
docs/en/transform/nulltf.md:
##########
@@ -0,0 +1,67 @@
+# Nulltf
+
+## Description
+
+set default value for null field
+
+:::tip
+
+This transform only supported by engine Spark.
+
+:::
+
+## Options
+
+| name | type | required | default value |
+| ------------------- | ------- | -------- | ------------- |
+| fields | array | no | - |
+
+### fields [list]
+
+A list of fields whose default value will be set.
+The default value of the field can be set in the form of "=value" after the
field name.
+If there is no "=value" after the field name, the default value will be set
according to the field type.
+
+## Examples
+
+the configuration
+
+```bash
+ nulltf {
+ fields = ["name","price=0","num=100","flag","dt_timestamp=2022-05-18
13:51:40.603","dt_date=2022-05-19"]
+ }
Review Comment:
```suggestion
fields : {
price:0
}
}
```
Can you use the conf style here, then you don't need to parse "=".
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