Add Query with UDF

Author: auxten

README-zh.md

@@ -106,7 +106,8 @@ sess.query(
 print("Select from view:\n")
 print(sess.query("SELECT * FROM db_xxx.view_xxx", "Pretty"))
 ```
-  
+
+参见: [test_stateful.py](tests/test_stateful.py)
 </details>
 
 <details>
@@ -126,6 +127,23 @@ conn1.close()
 ```
 </details>
 
+<details>
+    <summary><h4>🗂️ Query with UDF(User Defined Functions)</h4></summary>
+
+```python
+from chdb.udf import chdb_udf
+from chdb import query
+
+@chdb_udf()
+def sum_udf(lhs, rhs):
+    return int(lhs) + int(rhs)
+
+print(query("select sum_udf(12,22)"))
+```
+
+参见: [test_udf.py](tests/test_udf.py).
+</details>
+
 更多示例，请参见 [examples](examples) 和 [tests](tests)。
 
 ## 演示和示例

README.md

@@ -111,7 +111,8 @@ sess.query(
 print("Select from view:\n")
 print(sess.query("SELECT * FROM db_xxx.view_xxx", "Pretty"))
 ```
-  
+
+see also: [test_stateful.py](tests/test_stateful.py).
 </details>
 
 <details>
@@ -132,6 +133,23 @@ conn1.close()
 </details>
 
 
+<details>
+    <summary><h4>🗂️ Query with UDF(User Defined Functions)</h4></summary>
+
+```python
+from chdb.udf import chdb_udf
+from chdb import query
+
+@chdb_udf()
+def sum_udf(lhs, rhs):
+    return int(lhs) + int(rhs)
+
+print(query("select sum_udf(12,22)"))
+```
+
+see also: [test_udf.py](tests/test_udf.py).
+</details>
+
 For more examples, see [examples](examples) and [tests](tests).
 
 <br>