implement facade crate so macros can be used from same namespace

sqlx-core/src/executor.rs

@@ -0,0 +1,58 @@
+use crate::{backend::Backend, error::Error, query::IntoQueryParameters, row::FromSqlRow};
+use futures_core::{future::BoxFuture, stream::BoxStream};
+use futures_util::TryStreamExt;
+
+pub trait Executor: Send {
+    type Backend: Backend;
+
+    fn execute<'c, 'q: 'c, A: 'c>(
+        &'c mut self,
+        query: &'q str,
+        params: A,
+    ) -> BoxFuture<'c, Result<u64, Error>>
+    where
+        A: IntoQueryParameters<Self::Backend> + Send;
+
+    fn fetch<'c, 'q: 'c, T: 'c, A: 'c>(
+        &'c mut self,
+        query: &'q str,
+        params: A,
+    ) -> BoxStream<'c, Result<T, Error>>
+    where
+        A: IntoQueryParameters<Self::Backend> + Send,
+        T: FromSqlRow<Self::Backend> + Send + Unpin;
+
+    fn fetch_all<'c, 'q: 'c, T: 'c, A: 'c>(
+        &'c mut self,
+        query: &'q str,
+        params: A,
+    ) -> BoxFuture<'c, Result<Vec<T>, Error>>
+    where
+        A: IntoQueryParameters<Self::Backend> + Send,
+        T: FromSqlRow<Self::Backend> + Send + Unpin,
+    {
+        Box::pin(self.fetch(query, params).try_collect())
+    }
+
+    fn fetch_optional<'c, 'q: 'c, T: 'c, A: 'c>(
+        &'c mut self,
+        query: &'q str,
+        params: A,
+    ) -> BoxFuture<'c, Result<Option<T>, Error>>
+    where
+        A: IntoQueryParameters<Self::Backend> + Send,
+        T: FromSqlRow<Self::Backend> + Send;
+
+    fn fetch_one<'c, 'q: 'c, T: 'c, A: 'c>(
+        &'c mut self,
+        query: &'q str,
+        params: A,
+    ) -> BoxFuture<'c, Result<T, Error>>
+    where
+        A: IntoQueryParameters<Self::Backend> + Send,
+        T: FromSqlRow<Self::Backend> + Send,
+    {
+        let fut = self.fetch_optional(query, params);
+        Box::pin(async move { fut.await?.ok_or(Error::NotFound) })
+    }
+}