Function test_named_table_empty_names

python/pyarrow/tests/test_substrait.py:284–323

()

def test_named_table_empty_names():
    test_table_1 = pa.Table.from_pydict({"x": [1, 2, 3]})

    def table_provider(names, _):
        if not names:
            raise Exception("No names provided")
        elif names[0] == "t1":
            return test_table_1
        else:
            raise Exception("Unrecognized table name")

    substrait_query = """
    {
        "version": { "major": 9999 },
        "relations": [
        {"rel": {
            "read": {
            "base_schema": {
                "struct": {
                "types": [
                            {"i64": {}}
                        ]
                },
                "names": [
                        "x"
                        ]
            },
            "namedTable": {
                    "names": []
            }
            }
        }}
        ]
    }
    """
    query = tobytes(substrait_query)
    buf = pa._substrait._parse_json_plan(tobytes(query))
    exec_message = "names for NamedTable not provided"
    with pytest.raises(ArrowInvalid, match=exec_message):
        substrait.run_query(buf, table_provider=table_provider)


@pytest.mark.parametrize("use_threads", [True, False])