Fix SQL search_path for Trino query engine (#10248)

This PR replaces the generic `SET search_path TO` statement by `USE` for
the Trino dialect since Trino does not support `SET search_path`.
Official Trino documentation can be found
[here](https://trino.io/docs/current/sql/use.html).

With this fix, the `SQLdatabase` will now be able to set the current
schema and execute queries using the Trino engine. It will use the
catalog set as default by the connection uri.

libs/langchain/langchain/utilities/sql_database.py

@@ -384,6 +384,8 @@ def _execute(self, command: str, fetch: Optional[str] = "all") -> Sequence:
                     connection.exec_driver_sql(f"SET @@dataset_id='{self._schema}'")
                 elif self.dialect == "mssql":
                     pass
+                elif self.dialect == "trino":
+                    connection.exec_driver_sql(f"USE {self._schema}")
                 else:  # postgresql and compatible dialects
                     connection.exec_driver_sql(f"SET search_path TO {self._schema}")
             cursor = connection.execute(text(command))