Isolate Antfly ANN benchmark from default full-text work

tests/test_antfly.py

@@ -20,9 +20,10 @@ def search_param(self):
 
 
 class _Response:
-    is_success = True
-    status_code = 200
-    text = ""
+    def __init__(self, status_code: int = 200):
+        self.status_code = status_code
+        self.is_success = 200 <= status_code < 300
+        self.text = ""
 
     def raise_for_status(self):
         return None
@@ -105,3 +106,36 @@ def test_write_readiness_probe_does_not_create_a_tombstone():
         "inserts": {"key:__circus_write_probe__": {"id": -1}},
         "sync_level": "write",
     }
+
+
+def test_vector_benchmark_removes_default_full_text_index(monkeypatch):
+    adapter = _adapter()
+
+    class Client:
+        def __init__(self):
+            self.present = True
+            self.deleted = []
+
+        def get(self, path: str):
+            return _Response(200 if self.present else 404)
+
+        def delete(self, path: str):
+            self.deleted.append(path)
+            self.present = False
+            return _Response(204)
+
+    client = Client()
+    monkeypatch.setattr("time.sleep", lambda _: None)
+
+    adapter._remove_default_full_text_index(client)
+
+    assert client.deleted == ["/tables/vdbbench/indexes/full_text_index_v0"]
+
+
+def test_vector_benchmark_can_keep_default_full_text_index(monkeypatch):
+    adapter = _adapter()
+
+    monkeypatch.delenv("ANTFLY_VDBBENCH_KEEP_DEFAULT_FULL_TEXT", raising=False)
+    assert adapter._keep_default_full_text_index() is False
+    monkeypatch.setenv("ANTFLY_VDBBENCH_KEEP_DEFAULT_FULL_TEXT", "yes")
+    assert adapter._keep_default_full_text_index() is True

vectordb_bench/backend/clients/antfly/antfly.py

@@ -22,6 +22,7 @@
 INDEX_READY_POLL_INTERVAL = 2
 INDEX_NAME = "vec"
 INDEX_TYPES = ("embeddings", "aknn_v0")
+DEFAULT_FULL_TEXT_INDEX_NAME = "full_text_index_v0"
 SOURCE_FIELD = "vec_data"
 
 
@@ -128,6 +129,13 @@ def __init__(
             # while the shard is still initializing.
             self._wait_for_write_ready(client)
 
+            # Antfly's table quickstart contract creates a default full-text
+            # index even when the caller supplies no indexes. VectorDBBench is
+            # an ANN benchmark, so remove that unrelated replay consumer before
+            # loading unless a diagnostic run explicitly asks to retain it.
+            if not self._keep_default_full_text_index():
+                self._remove_default_full_text_index(client)
+
             self._ensure_external_index(client, dim)
             # Do not wait for an empty external index to finish rebuilding here.
             # antfly-zig keeps an empty external dense index in backfill state
@@ -137,6 +145,31 @@ def __init__(
         finally:
             client.close()
 
+    def _remove_default_full_text_index(self, client: httpx.Client) -> None:
+        path = f"/tables/{self.collection_name}/indexes/{DEFAULT_FULL_TEXT_INDEX_NAME}"
+        existing = client.get(path)
+        if existing.status_code == 404:
+            return
+        existing.raise_for_status()
+
+        response = client.delete(path)
+        log.info("Remove default full-text index response: %s", response.status_code)
+        if response.status_code != 404:
+            response.raise_for_status()
+
+        deadline = time.monotonic() + TABLE_READY_TIMEOUT
+        while time.monotonic() < deadline:
+            probe = client.get(path)
+            if probe.status_code == 404:
+                return
+            probe.raise_for_status()
+            time.sleep(TABLE_READY_POLL_INTERVAL)
+        message = f"Antfly default full-text index removal did not become visible within {TABLE_READY_TIMEOUT}s"
+        raise TimeoutError(message)
+
+    def _keep_default_full_text_index(self) -> bool:
+        return os.environ.get("ANTFLY_VDBBENCH_KEEP_DEFAULT_FULL_TEXT", "").lower() in {"1", "true", "yes"}
+
     def _ensure_external_index(self, client: httpx.Client, dim: int) -> None:
         """Create the external embeddings index, verifying shard registration.