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atoti_directquery_bigquery.ConnectionConfig(
    *,
    time_travel: bool = True,
    cache: bool = True,
    auto_multi_column_array_conversion: AutoMultiColumnArrayConversion | None = None,
    column_clustered_queries: ‘all’ | ‘feeding’ = 'feeding',
    feeding_query_timeout: Duration = datetime.timedelta(seconds=3600),
    lookup_mode: ‘allow’ | ‘warn’ | ‘deny’ = 'warn',
    max_sub_queries: Annotated[int, Field(gt=0)] = 500,
    query_timeout: Duration = datetime.timedelta(seconds=300),
    credentials: Path | None = None,
)
Config to connect to a BigQuery database.

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Attributes

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credentials

The path to a service account key file. If None, the application default credentials will be used. That is how an identity holding no key of its own reaches BigQuery, such as one federated through workload identity federation or an impersonated service account. Google recommends federating an existing identity rather than downloading a key.

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auto_multi_column_array_conversion

When not None, multi-column array conversion will be performed automatically.

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cache

Whether to look for query results in the external database query cache.

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column_clustered_queries

Control which queries will use clustering columns.

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feeding_query_timeout

Timeout for queries performed on the external database during feeding phases. The feeding phases are:

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lookup_mode

Whether lookup queries on the external database are allowed. Lookup can be very slow and expensive as the database may not enforce primary keys.

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max_sub_queries

Maximum number of sub queries performed when splitting a query into multi-step queries.

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query_timeout

Timeout for queries performed on the external database outside feeding phases.

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time_travel

Whether to use time travel in queries.