From def46f9c135b79cbf3f10cb140e5a64c4fef54a5 Mon Sep 17 00:00:00 2001
From: liangming <liangming@liangmingdeMac-mini.local>
Date: Sun, 23 Aug 2026 14:37:12 +0800
Subject: [PATCH] Render PostgreSQL filter clauses as SQL

---
 python/semantic_kernel/connectors/postgres.py |  6 ++++--
 .../connectors/memory/test_postgres_store.py  | 20 ++++++++++++++++++-
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/python/semantic_kernel/connectors/postgres.py b/python/semantic_kernel/connectors/postgres.py
index 5a7e66c15880..24ee3b40f320 100644
--- a/python/semantic_kernel/connectors/postgres.py
+++ b/python/semantic_kernel/connectors/postgres.py
@@ -795,9 +795,11 @@ def _construct_vector_query(
 
         if where_clauses := self._build_filter(options.filter):  # type: ignore
             query += (
-                sql.SQL("WHERE {clause}").format(clause=sql.SQL(" AND ").join(where_clauses))
+                sql.SQL("WHERE {clause}").format(
+                    clause=sql.SQL(" AND ").join(sql.SQL(clause) for clause in where_clauses)
+                )
                 if isinstance(where_clauses, list)
-                else sql.SQL("WHERE {clause}").format(clause=where_clauses)
+                else sql.SQL("WHERE {clause}").format(clause=sql.SQL(where_clauses))
             )
 
         query += sql.SQL(" ORDER BY {dist_col} LIMIT {limit}").format(
diff --git a/python/tests/unit/connectors/memory/test_postgres_store.py b/python/tests/unit/connectors/memory/test_postgres_store.py
index 8f417cf7036b..68dbc87fa959 100644
--- a/python/tests/unit/connectors/memory/test_postgres_store.py
+++ b/python/tests/unit/connectors/memory/test_postgres_store.py
@@ -17,7 +17,13 @@
     PostgresSettings,
     PostgresStore,
 )
-from semantic_kernel.data.vector import DistanceFunction, IndexKind, VectorStoreField, vectorstoremodel
+from semantic_kernel.data.vector import (
+    DistanceFunction,
+    IndexKind,
+    VectorSearchOptions,
+    VectorStoreField,
+    vectorstoremodel,
+)
 
 
 @fixture(scope="function")
@@ -322,6 +328,18 @@ def model_post_init(self, context: Any) -> None:
     assert statement_str == expected_statement
 
 
+async def test_vector_search_filter_is_rendered_as_sql(vector_store: PostgresStore) -> None:
+    collection = vector_store.get_collection(collection_name="test_collection", record_type=SimpleDataModel)
+    assert isinstance(collection, PostgresCollection)
+
+    query, _, _ = collection._construct_vector_query(
+        [1.0, 2.0, 3.0],
+        VectorSearchOptions(filter="lambda x: x.id == 1"),
+    )
+
+    assert 'WHERE "id" = 1' in query.as_string()
+
+
 async def test_model_post_init_conflicting_distance_column_name(vector_store: PostgresStore) -> None:
     @vectorstoremodel
     @dataclass