update readMe.md

add udf demo
4kingssea · Aug 28, 2018 · b623c03 · b623c03
1 parent 52eb94e
commit b623c03
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diff --git a/README.md b/README.md
@@ -45,6 +45,13 @@ with tb2 as (
     group by key,TUMBLE(rowtime,INTERVAL '5' SECOND)
 ) select * from tb2
 ```
+
+## UDF UDAF UDTF
+The registration of the custom function is consistent with the hive
+```sql
+create function json_parser as 'ideal.sylph.runner.flink.udf.JsonParser';
+```
+
 ## Building
 sylph builds use Gradle and requires Java 8.
 ```