1 files changed, 25 insertions, 0 deletions
diff --git a/src/tools/rust-analyzer/crates/query-group-macro/tests/multiple_dbs.rs b/src/tools/rust-analyzer/crates/query-group-macro/tests/multiple_dbs.rs
new file mode 100644
index 00000000000..f36e7fdbebf
--- /dev/null
+++ b/src/tools/rust-analyzer/crates/query-group-macro/tests/multiple_dbs.rs
@@ -0,0 +1,25 @@
+use query_group_macro::query_group;
+
+#[query_group]
+pub trait DatabaseOne: salsa::Database {
+    #[salsa::input]
+    fn input_string(&self) -> String;
+
+    // unadorned query
+    #[salsa::invoke_interned(length)]
+    fn length(&self, key: ()) -> usize;
+}
+
+#[query_group]
+pub trait DatabaseTwo: DatabaseOne {
+    #[salsa::invoke_interned(second_length)]
+    fn second_length(&self, key: ()) -> usize;
+}
+
+fn length(db: &dyn DatabaseOne, _key: ()) -> usize {
+    db.input_string().len()
+}
+
+fn second_length(db: &dyn DatabaseTwo, _key: ()) -> usize {
+    db.input_string().len()
+}