tmp1

Signed-off-by: junxiang Mu <[email protected]>

s3select/api/src/query/function.rs

@@ -0,0 +1,23 @@
+use std::collections::HashSet;
+use std::sync::Arc;
+
+use datafusion::logical_expr::{AggregateUDF, ScalarUDF, WindowUDF};
+
+use crate::QueryResult;
+
+pub type FuncMetaManagerRef = Arc<dyn FunctionMetadataManager + Send + Sync>;
+pub trait FunctionMetadataManager {
+    fn register_udf(&mut self, udf: ScalarUDF) -> QueryResult<()>;
+
+    fn register_udaf(&mut self, udaf: AggregateUDF) -> QueryResult<()>;
+
+    fn register_udwf(&mut self, udwf: WindowUDF) -> QueryResult<()>;
+
+    fn udf(&self, name: &str) -> QueryResult<Arc<ScalarUDF>>;
+
+    fn udaf(&self, name: &str) -> QueryResult<Arc<AggregateUDF>>;
+
+    fn udwf(&self, name: &str) -> QueryResult<Arc<WindowUDF>>;
+
+    fn udfs(&self) -> HashSet<String>;
+}