Reset requirements planner for every iteration.

Author: michaelstaib

src/HotChocolate/Fusion/src/Core/Planning/Pipeline/RequirementsPlannerMiddleware.cs

@@ -32,6 +32,7 @@ private static void Plan(QueryPlanContext context)
                 currentStep.ParentSelection is { } parent &&
                 currentStep.Resolver is not null)
             {
+                schemas.Clear();
                 siblingsToRemove.Clear();
                 roots.Clear();
 
@@ -65,7 +66,7 @@ currentStep.ParentSelection is { } parent &&
                     }
 
                     // Tracks the most recent execution step (by query plan step order) targeting a given subgraph
-                    // Replacing a previous execution step if necessary. 
+                    // Replacing a previous execution step if necessary.
                     schemas[siblingExecutionStep.SubgraphName] = siblingExecutionStep;
                 }
 

src/HotChocolate/Fusion/test/Core.Tests/__snapshots__/RequestPlannerTests.Query_Plan_27_Multiple_Require_Steps_From_Same_Subgraph.snap

@@ -33,7 +33,29 @@ QueryPlan
         "provides": [
           {
             "variable": "__fusion_exports__1"
-          },
+          }
+        ]
+      },
+      {
+        "type": "Compose",
+        "selectionSetIds": [
+          0
+        ]
+      },
+      {
+        "type": "Resolve",
+        "subgraph": "Books",
+        "document": "query Query_2($__fusion_exports__1: String!) { authorById(id: $__fusion_exports__1) { books { id __fusion_exports__2: authorId } } }",
+        "selectionSetId": 1,
+        "path": [
+          "authorById"
+        ],
+        "requires": [
+          {
+            "variable": "__fusion_exports__1"
+          }
+        ],
+        "provides": [
           {
             "variable": "__fusion_exports__2"
           }
@@ -42,51 +64,31 @@ QueryPlan
       {
         "type": "Compose",
         "selectionSetIds": [
-          0
+          1
         ]
       },
       {
-        "type": "Parallel",
-        "nodes": [
+        "type": "Resolve",
+        "subgraph": "Authors",
+        "document": "query Query_3($__fusion_exports__2: String!) { bookByAuthorId(authorId: $__fusion_exports__2) { author { __fusion_exports__3: id } } }",
+        "selectionSetId": 2,
+        "path": [
+          "bookByAuthorId"
+        ],
+        "requires": [
           {
-            "type": "Resolve",
-            "subgraph": "Books",
-            "document": "query Query_2($__fusion_exports__1: String!) { authorById(id: $__fusion_exports__1) { books { id } } }",
-            "selectionSetId": 1,
-            "path": [
-              "authorById"
-            ],
-            "requires": [
-              {
-                "variable": "__fusion_exports__1"
-              }
-            ]
-          },
+            "variable": "__fusion_exports__2"
+          }
+        ],
+        "provides": [
           {
-            "type": "Resolve",
-            "subgraph": "Authors",
-            "document": "query Query_3($__fusion_exports__2: String!) { bookByAuthorId(authorId: $__fusion_exports__2) { author { __fusion_exports__3: id } } }",
-            "selectionSetId": 2,
-            "path": [
-              "bookByAuthorId"
-            ],
-            "requires": [
-              {
-                "variable": "__fusion_exports__2"
-              }
-            ],
-            "provides": [
-              {
-                "variable": "__fusion_exports__3"
-              }
-            ]
+            "variable": "__fusion_exports__3"
           }
         ]
       },
       {
         "type": "Compose",
         "selectionSetIds": [
-          1,
           2
         ]
       },