in get_key_value pass value by ref

src/backend/impl_lmdb/cursor.rs

@@ -19,7 +19,7 @@ pub struct RoCursorImpl<'c>(pub(crate) lmdb::RoCursor<'c>);
 impl<'c> BackendRoCursor<'c> for RoCursorImpl<'c> {
     type Iter = IterImpl<'c, lmdb::RoCursor<'c>>;
 
-    fn get_key_value<K>(self, key: K, value: crate::value::Value) -> bool
+    fn get_key_value<K>(self, key: K, value: &crate::value::Value) -> bool
     where
         K: AsRef<[u8]> + 'c,
     {
@@ -68,7 +68,7 @@ pub struct RwCursorImpl<'c>(pub(crate) lmdb::RoCursor<'c>);
 impl<'c> BackendRoCursor<'c> for RwCursorImpl<'c> {
     type Iter = IterImpl<'c, lmdb::RoCursor<'c>>;
 
-    fn get_key_value<K>(self, key: K, value: crate::value::Value) -> bool
+    fn get_key_value<K>(self, key: K, value: &crate::value::Value) -> bool
     where
         K: AsRef<[u8]> + 'c,
     {

src/backend/impl_safe/cursor.rs

@@ -18,7 +18,7 @@ pub struct RoCursorImpl<'c>(pub(crate) &'c Snapshot);
 impl<'c> BackendRoCursor<'c> for RoCursorImpl<'c> {
     type Iter = IterImpl<'c>;
 
-    fn get_key_value<K>(self, key: K, value: crate::value::Value) -> bool {
+    fn get_key_value<K>(self, key: K, value: &crate::value::Value) -> bool {
         unimplemented!();
     }
 
@@ -53,7 +53,7 @@ impl<'c> BackendRoCursor<'c> for RoCursorImpl<'c> {
 impl<'c> BackendRoCursor<'c> for RoCursorImpl<'c> {
     type Iter = IterImpl<'c>;
 
-    fn get_key_value<K>(self, key: K, value: crate::value::Value) -> bool
+    fn get_key_value<K>(self, key: K, value: &crate::value::Value) -> bool
     where
         K: AsRef<[u8]> + 'c,
     {
@@ -97,7 +97,7 @@ pub struct RwCursorImpl<'c>(&'c mut Snapshot);
 impl<'c> BackendRoCursor<'c> for RwCursorImpl<'c> {
     type Iter = IterImpl<'c>;
 
-    fn get_key_value<K>(self, key: K, value: crate::value::Value) -> bool
+    fn get_key_value<K>(self, key: K, value: &crate::value::Value) -> bool
     where
         K: AsRef<[u8]> + 'c,
     {

src/backend/traits.rs

@@ -212,7 +212,7 @@ pub trait BackendRwDupPrevCursorTransaction: BackendRwTransaction {
 pub trait BackendRoCursor<'c>: Debug {
     type Iter: BackendIter<'c>;
 
-    fn get_key_value<K>(self, key: K, value: crate::value::Value) -> bool
+    fn get_key_value<K>(self, key: K, value: &crate::value::Value) -> bool
     where
         K: AsRef<[u8]> + 'c;
 

src/store/multi.rs

@@ -91,7 +91,7 @@ where
         &self,
         reader: &'r R,
         k: K,
-        v: Value,
+        v: &Value,
     ) -> Result<bool, StoreError>
     where
         R: Readable<'r, Database = D, RoCursor = C>,

tests/env-lmdb.rs

@@ -1201,17 +1201,17 @@ fn test_multi_get_key_value() {
     let reader = k.read().unwrap();
 
     let yes = sk
-        .get_key_value(&reader, "foo", Value::Blob(b"1234"))
+        .get_key_value(&reader, "foo", &Value::Blob(b"1234"))
         .unwrap();
     assert!(yes);
 
     let yes = sk
-        .get_key_value(&reader, "foo", Value::Blob(b"12345"))
+        .get_key_value(&reader, "foo", &Value::Blob(b"12345"))
         .unwrap();
     assert!(!yes);
 
     let yes = sk
-        .get_key_value(&reader, "foo2", Value::Blob(b"1234"))
+        .get_key_value(&reader, "foo2", &Value::Blob(b"1234"))
         .unwrap();
     assert!(!yes);
 }