Module materialize.zippy.peek_actions

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# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file at the root of this repository.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.

from textwrap import dedent

from materialize.mzcompose.composition import Composition
from materialize.zippy.balancerd_capabilities import BalancerdIsRunning
from materialize.zippy.framework import Action, Capability
from materialize.zippy.mz_capabilities import MzIsRunning


class PeekCancellation(Action):
    """Perfoms a peek cancellation."""

    @classmethod
    def requires(cls) -> set[type[Capability]]:
        return {BalancerdIsRunning, MzIsRunning}

    def run(self, c: Composition) -> None:
        c.testdrive(
            dedent(
                """
                    > DROP TABLE IF EXISTS peek_cancellation;
                    > CREATE TABLE IF NOT EXISTS peek_cancellation (f1 INTEGER);
                    > INSERT INTO peek_cancellation SELECT generate_series(1, 1000);

                    > SET statement_timeout = '10ms';

                    ! INSERT INTO peek_cancellation
                      SELECT 1 FROM peek_cancellation AS a1, peek_cancellation AS a2, peek_cancellation AS a3;
                    contains: timeout
                    """
            )
        )

Classes

class PeekCancellation (capabilities: Capabilities)

Perfoms a peek cancellation.

Construct a new action, possibly conditioning on the available capabilities.

Expand source code Browse git 
class PeekCancellation(Action):
    """Perfoms a peek cancellation."""

    @classmethod
    def requires(cls) -> set[type[Capability]]:
        return {BalancerdIsRunning, MzIsRunning}

    def run(self, c: Composition) -> None:
        c.testdrive(
            dedent(
                """
                    > DROP TABLE IF EXISTS peek_cancellation;
                    > CREATE TABLE IF NOT EXISTS peek_cancellation (f1 INTEGER);
                    > INSERT INTO peek_cancellation SELECT generate_series(1, 1000);

                    > SET statement_timeout = '10ms';

                    ! INSERT INTO peek_cancellation
                      SELECT 1 FROM peek_cancellation AS a1, peek_cancellation AS a2, peek_cancellation AS a3;
                    contains: timeout
                    """
            )
        )

Ancestors

Inherited members