From d728dd9d3f24b1a0cec7c5215e6506c2ea1d00da Mon Sep 17 00:00:00 2001
From: Marcin Antas <antas.marcin@gmail.com>
Date: Mon, 23 Mar 2026 14:47:43 +0100
Subject: [PATCH] feat: add support for alter schema drop vector index

---
 weaviate/collections/config/async_.pyi  |  1 +
 weaviate/collections/config/executor.py | 38 +++++++++++++++++++++++++
 weaviate/collections/config/sync.pyi    |  1 +
 3 files changed, 40 insertions(+)

diff --git a/weaviate/collections/config/async_.pyi b/weaviate/collections/config/async_.pyi
index 015b70dab..91139dd83 100644
--- a/weaviate/collections/config/async_.pyi
+++ b/weaviate/collections/config/async_.pyi
@@ -90,3 +90,4 @@ class _ConfigCollectionAsync(_ConfigCollectionExecutor[ConnectionAsync]):
         self, *, vector_config: Union[_VectorConfigCreate, List[_VectorConfigCreate]]
     ) -> None: ...
     async def delete_property_index(self, property_name: str, index_name: IndexName) -> bool: ...
+    async def delete_vector_index(self, vector_name: str) -> bool: ...
diff --git a/weaviate/collections/config/executor.py b/weaviate/collections/config/executor.py
index c95cba5a3..148174171 100644
--- a/weaviate/collections/config/executor.py
+++ b/weaviate/collections/config/executor.py
@@ -631,3 +631,41 @@ def resp(res: Response) -> bool:
             error_msg="Property may not exist",
             status_codes=_ExpectedStatusCodes(ok_in=[200], error="property exists"),
         )
+
+    def delete_vector_index(
+        self,
+        vector_name: str,
+    ) -> executor.Result[bool]:
+        """Delete a vector index from the collection in Weaviate.
+
+            This is a destructive operation. The index will
+            need to be regenerated if you wish to use it again.
+
+        Args:
+            vector_name: The name of the vector whose index to delete.
+
+        Raises:
+            weaviate.exceptions.WeaviateConnectionError: If the network connection to Weaviate fails.
+            weaviate.exceptions.UnexpectedStatusCodeError: If Weaviate reports a non-OK status.
+            weaviate.exceptions.WeaviateInvalidInputError: If the vector does not exist.
+        """
+        _validate_input(
+            [_ValidateArgument(expected=[str], name="vector_name", value=vector_name)]
+        )
+
+        path = (
+            f"/schema/{_capitalize_first_letter(self._name)}"
+            + f"/vectors/{vector_name}"
+            + "/index"
+        )
+
+        def resp(res: Response) -> bool:
+            return res.status_code == 200
+
+        return executor.execute(
+            response_callback=resp,
+            method=self._connection.delete,
+            path=path,
+            error_msg="Vector may not exist",
+            status_codes=_ExpectedStatusCodes(ok_in=[200], error="vector exists"),
+        )
diff --git a/weaviate/collections/config/sync.pyi b/weaviate/collections/config/sync.pyi
index e54d8c8fc..7bd450819 100644
--- a/weaviate/collections/config/sync.pyi
+++ b/weaviate/collections/config/sync.pyi
@@ -88,3 +88,4 @@ class _ConfigCollection(_ConfigCollectionExecutor[ConnectionSync]):
         self, *, vector_config: Union[_VectorConfigCreate, List[_VectorConfigCreate]]
     ) -> None: ...
     def delete_property_index(self, property_name: str, index_name: IndexName) -> bool: ...
+    def delete_vector_index(self, vector_name: str) -> bool: ...