ClickHouse/tests/integration/test_grant_and_revoke/test.py

import pytest
from helpers.cluster import ClickHouseCluster
from helpers.test_tools import TSV

cluster = ClickHouseCluster(__file__)
instance = cluster.add_instance(
    "instance",
    user_configs=[
        "configs/users.d/users.xml",
    ],
)


@pytest.fixture(scope="module", autouse=True)
def start_cluster():
    try:
        cluster.start()

        instance.query("CREATE DATABASE test")
        instance.query(
            "CREATE TABLE test.table(x UInt32, y UInt32) ENGINE = MergeTree ORDER BY tuple()"
        )
        instance.query(
            "CREATE TABLE test.table2(x UInt32, y UInt32) ENGINE = MergeTree ORDER BY tuple()"
        )
        instance.query("INSERT INTO test.table VALUES (1,5), (2,10)")

        yield cluster

    finally:
        cluster.shutdown()


@pytest.fixture(autouse=True)
def cleanup_after_test():
    try:
        yield
    finally:
        instance.query("DROP USER IF EXISTS A, B, C")
        instance.query("DROP TABLE IF EXISTS test.view_1")


def test_smoke():
    instance.query("CREATE USER A")
    assert "Not enough privileges" in instance.query_and_get_error(
        "SELECT * FROM test.table", user="A"
    )

    instance.query("GRANT SELECT ON test.table TO A")
    assert instance.query("SELECT * FROM test.table", user="A") == "1\t5\n2\t10\n"

    instance.query("REVOKE SELECT ON test.table FROM A")
    assert "Not enough privileges" in instance.query_and_get_error(
        "SELECT * FROM test.table", user="A"
    )


def test_grant_option():
    instance.query("CREATE USER A")
    instance.query("CREATE USER B")

    instance.query("GRANT SELECT ON test.table TO A")
    assert instance.query("SELECT * FROM test.table", user="A") == "1\t5\n2\t10\n"
    assert "Not enough privileges" in instance.query_and_get_error(
        "GRANT SELECT ON test.table TO B", user="A"
    )

    instance.query("GRANT SELECT ON test.table TO A WITH GRANT OPTION")
    instance.query("GRANT SELECT ON test.table TO B", user="A")
    assert instance.query("SELECT * FROM test.table", user="B") == "1\t5\n2\t10\n"

    instance.query("REVOKE SELECT ON test.table FROM A, B")


def test_revoke_requires_grant_option():
    instance.query("CREATE USER A")
    instance.query("CREATE USER B")

    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"

    expected_error = "Not enough privileges"
    assert expected_error in instance.query_and_get_error(
        "REVOKE SELECT ON test.table FROM B", user="A"
    )
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"

    instance.query("GRANT SELECT ON test.table TO A")
    expected_error = "privileges have been granted, but without grant option"
    assert expected_error in instance.query_and_get_error(
        "REVOKE SELECT ON test.table FROM B", user="A"
    )
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"

    instance.query("GRANT SELECT ON test.table TO A WITH GRANT OPTION")
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"
    instance.query("REVOKE SELECT ON test.table FROM B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == ""

    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"
    instance.query("REVOKE SELECT ON test.* FROM B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == ""

    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"
    instance.query("REVOKE ALL ON test.* FROM B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == ""

    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"
    instance.query("REVOKE ALL ON *.* FROM B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == ""

    instance.query("REVOKE GRANT OPTION FOR ALL ON *.* FROM A")
    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"
    expected_error = "privileges have been granted, but without grant option"
    assert expected_error in instance.query_and_get_error(
        "REVOKE SELECT ON test.table FROM B", user="A"
    )
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"

    instance.query("GRANT SELECT ON test.* TO A WITH GRANT OPTION")
    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR B") == "GRANT SELECT ON test.table TO B\n"
    instance.query("REVOKE SELECT ON test.table FROM B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == ""


def test_allowed_grantees():
    instance.query("CREATE USER A")
    instance.query("CREATE USER B")

    instance.query("GRANT SELECT ON test.table TO A WITH GRANT OPTION")
    instance.query("GRANT SELECT ON test.table TO B", user="A")
    assert instance.query("SELECT * FROM test.table", user="B") == "1\t5\n2\t10\n"
    instance.query("REVOKE SELECT ON test.table FROM B", user="A")

    instance.query("ALTER USER A GRANTEES NONE")
    expected_error = "user `B` is not allowed as grantee"
    assert expected_error in instance.query_and_get_error(
        "GRANT SELECT ON test.table TO B", user="A"
    )

    instance.query("ALTER USER A GRANTEES ANY EXCEPT B")
    assert (
        instance.query("SHOW CREATE USER A") == "CREATE USER A GRANTEES ANY EXCEPT B\n"
    )
    expected_error = "user `B` is not allowed as grantee"
    assert expected_error in instance.query_and_get_error(
        "GRANT SELECT ON test.table TO B", user="A"
    )

    instance.query("ALTER USER A GRANTEES B")
    instance.query("GRANT SELECT ON test.table TO B", user="A")
    assert instance.query("SELECT * FROM test.table", user="B") == "1\t5\n2\t10\n"
    instance.query("REVOKE SELECT ON test.table FROM B", user="A")

    instance.query("ALTER USER A GRANTEES ANY")
    assert instance.query("SHOW CREATE USER A") == "CREATE USER A\n"
    instance.query("GRANT SELECT ON test.table TO B", user="A")
    assert instance.query("SELECT * FROM test.table", user="B") == "1\t5\n2\t10\n"

    instance.query("ALTER USER A GRANTEES NONE")
    expected_error = "user `B` is not allowed as grantee"
    assert expected_error in instance.query_and_get_error(
        "REVOKE SELECT ON test.table FROM B", user="A"
    )

    instance.query("CREATE USER C GRANTEES ANY EXCEPT C")
    assert (
        instance.query("SHOW CREATE USER C") == "CREATE USER C GRANTEES ANY EXCEPT C\n"
    )
    instance.query("GRANT SELECT ON test.table TO C WITH GRANT OPTION")
    assert instance.query("SELECT * FROM test.table", user="C") == "1\t5\n2\t10\n"
    expected_error = "user `C` is not allowed as grantee"
    assert expected_error in instance.query_and_get_error(
        "REVOKE SELECT ON test.table FROM C", user="C"
    )


def test_grant_all_on_table():
    instance.query("CREATE USER A, B")
    instance.query("GRANT ALL ON test.table TO A WITH GRANT OPTION")
    instance.query("GRANT ALL ON test.table TO B", user="A")
    assert (
        instance.query("SHOW GRANTS FOR B")
        == "GRANT SHOW TABLES, SHOW COLUMNS, SHOW DICTIONARIES, SELECT, INSERT, ALTER TABLE, ALTER VIEW, CREATE TABLE, CREATE VIEW, CREATE DICTIONARY, "
        "DROP TABLE, DROP VIEW, DROP DICTIONARY, UNDROP TABLE, TRUNCATE, OPTIMIZE, BACKUP, CREATE ROW POLICY, ALTER ROW POLICY, DROP ROW POLICY, SHOW ROW POLICIES, "
        "SYSTEM MERGES, SYSTEM TTL MERGES, SYSTEM FETCHES, SYSTEM MOVES, SYSTEM PULLING REPLICATION LOG, SYSTEM CLEANUP, SYSTEM VIEWS, SYSTEM SENDS, SYSTEM REPLICATION QUEUES, SYSTEM DROP REPLICA, SYSTEM SYNC REPLICA, "
        "SYSTEM RESTART REPLICA, SYSTEM RESTORE REPLICA, SYSTEM WAIT LOADING PARTS, SYSTEM FLUSH DISTRIBUTED, dictGet ON test.table TO B\n"
    )
    instance.query("REVOKE ALL ON test.table FROM B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == ""


def test_implicit_show_grants():
    instance.query("CREATE USER A")
    assert (
        instance.query(
            "select count() FROM system.databases WHERE name='test'", user="A"
        )
        == "0\n"
    )
    assert (
        instance.query(
            "select count() FROM system.tables WHERE database='test' AND name='table'",
            user="A",
        )
        == "0\n"
    )
    assert (
        instance.query(
            "select count() FROM system.columns WHERE database='test' AND table='table'",
            user="A",
        )
        == "0\n"
    )

    instance.query("GRANT SELECT(x) ON test.table TO A")
    assert instance.query("SHOW GRANTS FOR A") == "GRANT SELECT(x) ON test.table TO A\n"
    assert (
        instance.query(
            "select count() FROM system.databases WHERE name='test'", user="A"
        )
        == "1\n"
    )
    assert (
        instance.query(
            "select count() FROM system.tables WHERE database='test' AND name='table'",
            user="A",
        )
        == "1\n"
    )
    assert (
        instance.query(
            "select count() FROM system.columns WHERE database='test' AND table='table'",
            user="A",
        )
        == "1\n"
    )

    instance.query("GRANT SELECT ON test.table TO A")
    assert instance.query("SHOW GRANTS FOR A") == "GRANT SELECT ON test.table TO A\n"
    assert (
        instance.query(
            "select count() FROM system.databases WHERE name='test'", user="A"
        )
        == "1\n"
    )
    assert (
        instance.query(
            "select count() FROM system.tables WHERE database='test' AND name='table'",
            user="A",
        )
        == "1\n"
    )
    assert (
        instance.query(
            "select count() FROM system.columns WHERE database='test' AND table='table'",
            user="A",
        )
        == "2\n"
    )

    instance.query("GRANT SELECT ON test.* TO A")
    assert instance.query("SHOW GRANTS FOR A") == "GRANT SELECT ON test.* TO A\n"
    assert (
        instance.query(
            "select count() FROM system.databases WHERE name='test'", user="A"
        )
        == "1\n"
    )
    assert (
        instance.query(
            "select count() FROM system.tables WHERE database='test' AND name='table'",
            user="A",
        )
        == "1\n"
    )
    assert (
        instance.query(
            "select count() FROM system.columns WHERE database='test' AND table='table'",
            user="A",
        )
        == "2\n"
    )

    instance.query("GRANT SELECT ON *.* TO A")
    assert instance.query("SHOW GRANTS FOR A") == "GRANT SELECT ON *.* TO A\n"
    assert (
        instance.query(
            "select count() FROM system.databases WHERE name='test'", user="A"
        )
        == "1\n"
    )
    assert (
        instance.query(
            "select count() FROM system.tables WHERE database='test' AND name='table'",
            user="A",
        )
        == "1\n"
    )
    assert (
        instance.query(
            "select count() FROM system.columns WHERE database='test' AND table='table'",
            user="A",
        )
        == "2\n"
    )

    instance.query("REVOKE ALL ON *.* FROM A")
    assert (
        instance.query(
            "select count() FROM system.databases WHERE name='test'", user="A"
        )
        == "0\n"
    )
    assert (
        instance.query(
            "select count() FROM system.tables WHERE database='test' AND name='table'",
            user="A",
        )
        == "0\n"
    )
    assert (
        instance.query(
            "select count() FROM system.columns WHERE database='test' AND table='table'",
            user="A",
        )
        == "0\n"
    )


def test_implicit_create_view_grant():
    instance.query("CREATE USER A")
    expected_error = "Not enough privileges"
    assert expected_error in instance.query_and_get_error(
        "CREATE VIEW test.view_1 AS SELECT 1", user="A"
    )

    instance.query("GRANT CREATE TABLE ON test.* TO A")
    instance.query("CREATE VIEW test.view_1 AS SELECT 1", user="A")
    assert instance.query("SELECT * FROM test.view_1") == "1\n"

    instance.query("REVOKE CREATE TABLE ON test.* FROM A")
    instance.query("DROP TABLE test.view_1")
    assert expected_error in instance.query_and_get_error(
        "CREATE VIEW test.view_1 AS SELECT 1", user="A"
    )

    # check grant option
    instance.query("CREATE USER B")
    expected_error = "Not enough privileges"
    assert expected_error in instance.query_and_get_error(
        "GRANT CREATE VIEW ON test.* TO B", user="A"
    )

    instance.query("GRANT CREATE TABLE ON test.* TO A WITH GRANT OPTION")
    instance.query("GRANT CREATE VIEW ON test.* TO B", user="A")
    instance.query("CREATE VIEW test.view_2 AS SELECT 1", user="B")
    assert instance.query("SELECT * FROM test.view_2") == "1\n"


def test_implicit_create_temporary_table_grant():
    instance.query("CREATE USER A")
    expected_error = "Not enough privileges"
    assert expected_error in instance.query_and_get_error(
        "CREATE TEMPORARY TABLE tmp(name String)", user="A"
    )

    instance.query("GRANT CREATE TABLE ON test.* TO A")
    instance.query("CREATE TEMPORARY TABLE tmp(name String)", user="A")

    instance.query("REVOKE CREATE TABLE ON *.* FROM A")
    assert expected_error in instance.query_and_get_error(
        "CREATE TEMPORARY TABLE tmp(name String)", user="A"
    )


def test_introspection():
    instance.query("CREATE USER A")
    instance.query("CREATE USER B")
    instance.query("GRANT SELECT ON test.table TO A")
    instance.query("GRANT CREATE ON *.* TO B WITH GRANT OPTION")

    assert instance.query("SHOW USERS") == TSV(["A", "B", "default"])
    assert instance.query("SHOW CREATE USERS A") == TSV(["CREATE USER A"])
    assert instance.query("SHOW CREATE USERS B") == TSV(["CREATE USER B"])
    assert instance.query("SHOW CREATE USERS A,B") == TSV(
        ["CREATE USER A", "CREATE USER B"]
    )
    assert instance.query("SHOW CREATE USERS") == TSV(
        [
            "CREATE USER A",
            "CREATE USER B",
            "CREATE USER default IDENTIFIED WITH plaintext_password SETTINGS PROFILE default",
        ]
    )

    assert instance.query("SHOW GRANTS FOR A") == TSV(
        ["GRANT SELECT ON test.table TO A"]
    )
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        ["GRANT CREATE ON *.* TO B WITH GRANT OPTION"]
    )
    assert instance.query("SHOW GRANTS FOR default") == TSV(
        ["GRANT ALL ON *.* TO default WITH GRANT OPTION"]
    )
    assert instance.query("SHOW GRANTS FOR A,B") == TSV(
        [
            "GRANT SELECT ON test.table TO A",
            "GRANT CREATE ON *.* TO B WITH GRANT OPTION",
        ]
    )
    assert instance.query("SHOW GRANTS FOR B,A") == TSV(
        [
            "GRANT SELECT ON test.table TO A",
            "GRANT CREATE ON *.* TO B WITH GRANT OPTION",
        ]
    )
    assert instance.query("SHOW GRANTS FOR ALL") == TSV(
        [
            "GRANT SELECT ON test.table TO A",
            "GRANT CREATE ON *.* TO B WITH GRANT OPTION",
            "GRANT ALL ON *.* TO default WITH GRANT OPTION",
        ]
    )

    assert instance.query("SHOW GRANTS", user="A") == TSV(
        ["GRANT SELECT ON test.table TO A"]
    )
    assert instance.query("SHOW GRANTS", user="B") == TSV(
        ["GRANT CREATE ON *.* TO B WITH GRANT OPTION"]
    )

    assert instance.query("SHOW GRANTS FOR ALL", user="A") == TSV(
        ["GRANT SELECT ON test.table TO A"]
    )
    assert instance.query("SHOW GRANTS FOR ALL", user="B") == TSV(
        ["GRANT CREATE ON *.* TO B WITH GRANT OPTION"]
    )
    assert instance.query("SHOW GRANTS FOR ALL") == TSV(
        [
            "GRANT SELECT ON test.table TO A",
            "GRANT CREATE ON *.* TO B WITH GRANT OPTION",
            "GRANT ALL ON *.* TO default WITH GRANT OPTION",
        ]
    )

    expected_error = "necessary to have the grant SHOW USERS"
    assert expected_error in instance.query_and_get_error("SHOW GRANTS FOR B", user="A")

    expected_access1 = (
        "CREATE USER A\n"
        "CREATE USER B\n"
        "CREATE USER default IDENTIFIED WITH plaintext_password SETTINGS PROFILE default"
    )
    expected_access2 = (
        "GRANT SELECT ON test.table TO A\n"
        "GRANT CREATE ON *.* TO B WITH GRANT OPTION\n"
        "GRANT ALL ON *.* TO default WITH GRANT OPTION\n"
    )
    assert expected_access1 in instance.query("SHOW ACCESS")
    assert expected_access2 in instance.query("SHOW ACCESS")

    assert instance.query(
        "SELECT name, storage, auth_type, auth_params, host_ip, host_names, host_names_regexp, host_names_like, default_roles_all, default_roles_list, default_roles_except from system.users WHERE name IN ('A', 'B') ORDER BY name"
    ) == TSV(
        [
            [
                "A",
                "local_directory",
                "no_password",
                "{}",
                "['::/0']",
                "[]",
                "[]",
                "[]",
                1,
                "[]",
                "[]",
            ],
            [
                "B",
                "local_directory",
                "no_password",
                "{}",
                "['::/0']",
                "[]",
                "[]",
                "[]",
                1,
                "[]",
                "[]",
            ],
        ]
    )

    assert instance.query(
        "SELECT * from system.grants WHERE user_name IN ('A', 'B') ORDER BY user_name, access_type, grant_option"
    ) == TSV(
        [
            ["A", "\\N", "SELECT", "test", "table", "\\N", 0, 0],
            ["B", "\\N", "CREATE", "\\N", "\\N", "\\N", 0, 1],
        ]
    )


def test_current_database():
    instance.query("CREATE USER A")
    instance.query("GRANT SELECT ON table TO A", database="test")

    assert instance.query("SHOW GRANTS FOR A") == TSV(
        ["GRANT SELECT ON test.table TO A"]
    )
    assert instance.query("SHOW GRANTS FOR A", database="test") == TSV(
        ["GRANT SELECT ON test.table TO A"]
    )

    assert instance.query("SELECT * FROM test.table", user="A") == "1\t5\n2\t10\n"
    assert (
        instance.query("SELECT * FROM table", user="A", database="test")
        == "1\t5\n2\t10\n"
    )

    instance.query(
        "CREATE TABLE default.table(x UInt32, y UInt32) ENGINE = MergeTree ORDER BY tuple()"
    )
    assert "Not enough privileges" in instance.query_and_get_error(
        "SELECT * FROM table", user="A"
    )


def test_grant_with_replace_option():
    instance.query("CREATE USER A")
    instance.query("GRANT SELECT ON test.table TO A")
    assert instance.query("SHOW GRANTS FOR A") == TSV(
        ["GRANT SELECT ON test.table TO A"]
    )

    instance.query("GRANT INSERT ON test.table TO A WITH REPLACE OPTION")
    assert instance.query("SHOW GRANTS FOR A") == TSV(
        ["GRANT INSERT ON test.table TO A"]
    )

    instance.query("GRANT NONE ON *.* TO A WITH REPLACE OPTION")
    assert instance.query("SHOW GRANTS FOR A") == TSV([])

    instance.query("CREATE USER B")
    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR A") == TSV([])
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        ["GRANT SELECT ON test.table TO B"]
    )

    expected_error = (
        "it's necessary to have the grant INSERT ON test.table WITH GRANT OPTION"
    )
    assert expected_error in instance.query_and_get_error(
        "GRANT INSERT ON test.table TO B WITH REPLACE OPTION", user="A"
    )
    assert instance.query("SHOW GRANTS FOR A") == TSV([])
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        ["GRANT SELECT ON test.table TO B"]
    )

    instance.query("GRANT INSERT ON test.table TO A WITH GRANT OPTION")
    expected_error = (
        "it's necessary to have the grant SELECT ON test.table WITH GRANT OPTION"
    )
    assert expected_error in instance.query_and_get_error(
        "GRANT INSERT ON test.table TO B WITH REPLACE OPTION", user="A"
    )
    assert instance.query("SHOW GRANTS FOR A") == TSV(
        ["GRANT INSERT ON test.table TO A WITH GRANT OPTION"]
    )
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        ["GRANT SELECT ON test.table TO B"]
    )

    instance.query("GRANT SELECT ON test.table TO A WITH GRANT OPTION")
    instance.query("GRANT INSERT ON test.table TO B WITH REPLACE OPTION", user="A")
    assert instance.query("SHOW GRANTS FOR A") == TSV(
        ["GRANT SELECT, INSERT ON test.table TO A WITH GRANT OPTION"]
    )
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        ["GRANT INSERT ON test.table TO B"]
    )


def test_grant_current_grants():
    instance.query("CREATE USER A")
    instance.query(
        "GRANT SELECT, CREATE TABLE, CREATE VIEW ON test.* TO A WITH GRANT OPTION"
    )
    assert instance.query("SHOW GRANTS FOR A") == TSV(
        ["GRANT SELECT, CREATE TABLE, CREATE VIEW ON test.* TO A WITH GRANT OPTION"]
    )

    instance.query("CREATE USER B")
    instance.query("GRANT CURRENT GRANTS ON *.* TO B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        ["GRANT SELECT, CREATE TABLE, CREATE VIEW ON test.* TO B"]
    )

    instance.query("CREATE USER C")
    instance.query("GRANT CURRENT GRANTS(CREATE ON test.*) TO C", user="A")
    assert instance.query("SHOW GRANTS FOR C") == TSV(
        ["GRANT CREATE TABLE, CREATE VIEW ON test.* TO C"]
    )

    instance.query("DROP USER IF EXISTS C")
    instance.query("CREATE USER C")
    instance.query("GRANT CURRENT GRANTS(NONE ON *.*) TO C", user="A")
    assert instance.query("SHOW GRANTS FOR C") == TSV([])


def test_grant_current_grants_with_partial_revoke():
    instance.query("CREATE USER A")
    instance.query("GRANT CREATE TABLE ON *.* TO A")
    instance.query("REVOKE CREATE TABLE ON test.* FROM A")
    instance.query("GRANT CREATE TABLE ON test.table TO A WITH GRANT OPTION")
    instance.query("GRANT SELECT ON *.* TO A WITH GRANT OPTION")
    instance.query("REVOKE SELECT ON test.* FROM A")
    instance.query("GRANT SELECT ON test.table TO A WITH GRANT OPTION")
    instance.query("GRANT SELECT ON test.table2 TO A")

    assert instance.query("SHOW GRANTS FOR A") == TSV(
        [
            "GRANT CREATE TABLE ON *.* TO A",
            "GRANT SELECT ON *.* TO A WITH GRANT OPTION",
            "REVOKE SELECT, CREATE TABLE ON test.* FROM A",
            "GRANT SELECT, CREATE TABLE ON test.table TO A WITH GRANT OPTION",
            "GRANT SELECT ON test.table2 TO A",
        ]
    )

    instance.query("CREATE USER B")
    instance.query("GRANT CURRENT GRANTS ON *.* TO B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        [
            "GRANT SELECT ON *.* TO B",
            "REVOKE SELECT ON test.* FROM B",
            "GRANT SELECT, CREATE TABLE ON test.table TO B",
        ]
    )

    instance.query("DROP USER IF EXISTS B")
    instance.query("CREATE USER B")
    instance.query("GRANT CURRENT GRANTS ON *.* TO B WITH GRANT OPTION", user="A")
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        [
            "GRANT SELECT ON *.* TO B WITH GRANT OPTION",
            "REVOKE SELECT ON test.* FROM B",
            "GRANT SELECT, CREATE TABLE ON test.table TO B WITH GRANT OPTION",
        ]
    )

    instance.query("DROP USER IF EXISTS C")
    instance.query("CREATE USER C")
    instance.query("GRANT SELECT ON test.* TO B")
    instance.query("GRANT CURRENT GRANTS ON *.* TO C", user="B")
    assert instance.query("SHOW GRANTS FOR C") == TSV(
        [
            "GRANT SELECT ON *.* TO C",
            "GRANT CREATE TABLE ON test.table TO C",
        ]
    )

    instance.query("DROP USER IF EXISTS B")
    instance.query("CREATE USER B")
    instance.query("GRANT CURRENT GRANTS ON test.* TO B WITH GRANT OPTION", user="A")
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        [
            "GRANT SELECT, CREATE TABLE ON test.table TO B WITH GRANT OPTION",
        ]
    )


def test_current_grants_override():
    instance.query("CREATE USER A")
    instance.query("GRANT SELECT ON *.* TO A WITH GRANT OPTION")
    instance.query("REVOKE SELECT ON test.* FROM A")
    assert instance.query("SHOW GRANTS FOR A") == TSV(
        [
            "GRANT SELECT ON *.* TO A WITH GRANT OPTION",
            "REVOKE SELECT ON test.* FROM A",
        ]
    )

    instance.query("CREATE USER B")
    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        ["GRANT SELECT ON test.table TO B"]
    )

    instance.query("GRANT CURRENT GRANTS ON *.* TO B", user="A")
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        [
            "GRANT SELECT ON *.* TO B",
            "REVOKE SELECT ON test.* FROM B",
            "GRANT SELECT ON test.table TO B",
        ]
    )

    instance.query("DROP USER IF EXISTS B")
    instance.query("CREATE USER B")
    instance.query("GRANT SELECT ON test.table TO B")
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        ["GRANT SELECT ON test.table TO B"]
    )

    instance.query("GRANT CURRENT GRANTS ON *.* TO B WITH REPLACE OPTION", user="A")
    assert instance.query("SHOW GRANTS FOR B") == TSV(
        [
            "GRANT SELECT ON *.* TO B",
            "REVOKE SELECT ON test.* FROM B",
        ]
    )