Database

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Both the Android and iOS platforms use a SQLite database for storing data.

Minimum SQLite version:

• Android 24 - V3.9.2
• iOS 14.0 - V3.32.3

Schema

TestDescriptor

Stores installed test descriptors: Run V2 descriptors and NewsMediaScan default descriptors. It does not store OONI default descriptors, but it will in the future.

CREATE TABLE TestDescriptor (
    runId TEXT NOT NULL,
    revision INTEGER NOT NULL,
    name TEXT,
    short_description TEXT,
    description TEXT,
    author TEXT,
    nettests TEXT,
    name_intl TEXT,
    short_description_intl TEXT,
    description_intl TEXT,
    icon TEXT,
    color TEXT,
    animation TEXT,
    expiration_date INTEGER,
    date_created INTEGER,
    date_updated INTEGER,
    auto_update INTEGER,
    rejected_revision INTEGER,
    PRIMARY KEY(`runId`, `revision`)
);

Notes

• We store old revisions in the database, so old results can still show the old descriptor information. But we clear `nettests field of old revisions, to save space, since we no longer need them.

Result

A Result is an aggregation of measurements from a single TestDescriptor ran in a point in time.

CREATE TABLE Result(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    descriptor_name TEXT,
    descriptor_runId TEXT,
    descriptor_revision INTEGER,
    start_time INTEGER,
    is_viewed INTEGER,
    is_done INTEGER,
    data_usage_up INTEGER,
    data_usage_down INTEGER,
    failure_msg TEXT,
    network_id INTEGER,
    task_origin TEXT DEFAULT 'ooni-run',
    FOREIGN KEY(`network_id`) REFERENCES Network(`id`) ON UPDATE NO ACTION ON DELETE NO ACTION,
    FOREIGN KEY(`descriptor_runId`, `descriptor_revision`) REFERENCES TestDescriptor(`runId`, `revision`) ON UPDATE NO ACTION ON DELETE NO ACTION
);

CREATE INDEX idx_result_start_time ON Result (start_time);
CREATE INDEX idx_result_descriptor_name ON Result (descriptor_name);
CREATE INDEX idx_result_task_origin ON Result (task_origin);

Notes

• descriptor_runId and descriptor_revision are only present when the Result is related with an installed TestDescriptor. If its a Result from a default OONI descriptor, it’s linked using the descriptor_name instead.
• task_origin possible values are:
  • ooni-run for manually user-started tests;
  • autorun for automatically started background tests.

Network

Network details of one or more Results.

CREATE TABLE Network(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    network_name TEXT,
    asn TEXT,
    country_code TEXT,
    network_type TEXT
);

Measurement

Stores the outcome of a single net-test from a TestDescriptor. If the net-test has more than one input (web_connectivity tests usually), a Measurement is created for each input.

CREATE TABLE Measurement(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    test_name TEXT,
    start_time INTEGER,
    runtime REAL,
    is_done INTEGER,
    is_uploaded INTEGER,
    is_failed INTEGER,
    failure_msg TEXT,
    is_upload_failed INTEGER,
    upload_failure_msg TEXT,
    is_rerun INTEGER,
    report_id TEXT,
    is_anomaly INTEGER,
    test_keys TEXT,
    url_id INTEGER,
    result_id INTEGER,
    rerun_network TEXT,
    FOREIGN KEY(`url_id`) REFERENCES Url(`id`) ON UPDATE NO ACTION ON DELETE NO ACTION,
    FOREIGN KEY(`result_id`) REFERENCES Result(`id`) ON UPDATE NO ACTION ON DELETE NO ACTION
);

CREATE INDEX idx_measure_result_id ON Measurement (result_id);
CREATE INDEX idx_measure_start_time ON Measurement (start_time);

Notes

• We are no longer storing the full test_keys in the database. We only store the keys for Performance net-tests is they are present.

Url

Stores the Url details for a web_connectivity net-test Measurement.

CREATE TABLE Url(
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    url TEXT,
    category_code TEXT,
    country_code TEXT
);