databricks · vikrantpuppala · Jun 5, 2026 · Jun 5, 2026
diff --git a/tests/e2e/test_transactions.py b/tests/e2e/test_transactions.py
@@ -565,17 +565,19 @@ class TestMstBlockedSql:
    "Only SELECT / INSERT / MERGE / UPDATE / DELETE / DESCRIBE TABLE are supported."

    The server has since broadened the allowlist to include SHOW COLUMNS
-    (ShowDeltaTableColumnsCommand), observed on current DBSQL warehouses.
+    (ShowDeltaTableColumnsCommand) and DESCRIBE QUERY (DescribeQueryCommand),
+    observed on current DBSQL warehouses.

    Blocked (throw + abort txn):
    - SHOW TABLES, SHOW SCHEMAS, SHOW CATALOGS, SHOW FUNCTIONS
-    - DESCRIBE QUERY, DESCRIBE TABLE EXTENDED
+    - DESCRIBE TABLE EXTENDED
    - SELECT FROM information_schema
    - Thrift Get{Catalogs,Schemas,Tables,Columns} RPCs (see TestMstMetadata)

    Allowed:
    - DESCRIBE TABLE (basic form)
    - SHOW COLUMNS
+    - DESCRIBE QUERY
    """

    def _assert_blocked_and_txn_aborted(self, mst_conn_params, fq_table, blocked_sql):
@@ -652,10 +654,14 @@ def test_show_columns_not_blocked(self, mst_conn_params, mst_table):
            mst_conn_params, fq_table, f"SHOW COLUMNS IN {fq_table}"
        )

-    def test_describe_query_blocked(self, mst_conn_params, mst_table):
-        """DESCRIBE QUERY is blocked in MST (DescribeQueryCommand)."""
+    def test_describe_query_not_blocked(self, mst_conn_params, mst_table):
+        """DESCRIBE QUERY succeeds in MST — now allowed by the server's MSTCheckRule allowlist.
+
+        Previously blocked (DescribeQueryCommand), the server has since broadened
+        the allowlist to include it, mirroring the earlier SHOW COLUMNS change.
+        """
        fq_table, _ = mst_table
-        self._assert_blocked_and_txn_aborted(
+        self._assert_not_blocked(
            mst_conn_params,
            fq_table,
            f"DESCRIBE QUERY SELECT * FROM {fq_table}",