fix: groupby path expression with overlapping identifier

hana/lib/HANAService.js

@@ -548,7 +548,7 @@ class HANAService extends SQLService {
                     // if (col.ref?.length === 1) { col.ref.unshift(parent.as) }
                     if (col.ref?.length > 1) {
                       const colName = this.column_name(col)
-                      if (!parent.SELECT.columns.some(c => this.column_name(c) === colName)) {
+                      if (!parent.SELECT.columns.some(c => !c.elements && this.column_name(c) === colName)) {
                         const isSource = from => {
                           if (from.as === col.ref[0]) return true
                           return from.args?.some(a => {

test/compliance/SELECT.test.js

@@ -635,6 +635,20 @@ describe('SELECT', () => {
       const res = await cds.run(cqn)
       assert.strictEqual(res.length, 3, 'Ensure that all rows are coming back')
     })
+
+    test('navigation with duplicate identifier in path', async () => {
+      const { Books } = cds.entities('complex.associations')
+      const cqn = CQL`SELECT name { name } FROM ${Books} GROUP BY name.name`
+      const res = await cds.run(cqn)
+      assert.strictEqual(res.length, 1, 'Ensure that all rows are coming back')
+    })
+
+    test('navigation with duplicate identifier in path and aggregation', async () => {
+      const { Books } = cds.entities('complex.associations')
+      const cqn = CQL`SELECT name { name }, count(1) as total FROM ${Books} GROUP BY name.name`
+      const res = await cds.run(cqn)
+      assert.strictEqual(res.length, 1, 'Ensure that all rows are coming back')
+    })
   })
 
   describe('having', () => {

test/compliance/resources/db/complex/associations.cds

@@ -4,6 +4,7 @@ entity Books {
   key ID : Integer;
   title  : String(111);
   author : Association to Authors;
+  name   : Association to Authors on $self.author.ID = ID;
 }
 
 entity Authors {