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final class atoti_directquery_clickhouse.ConnectionConfig

Config to connect to a ClickHouse database.

column_clustered_queries : ‘all’ | ‘feeding’ = ‘feeding’

Control which queries will use clustering columns.

feeding_query_timeout : Duration = datetime.timedelta(seconds=3600)

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

lookup_mode : ‘allow’ | ‘warn’ | ‘deny’ = ‘warn’

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

max_sub_queries : Annotated[int, Field(gt=0)] = 500

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

password : str | None = None

The password to connect to the database. Passing it in this separate attribute prevents it from being logged alongside the connection string. If None, a password is expected to be present in url.

query_timeout : Duration = datetime.timedelta(seconds=300)

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

url : str

The connection string. The pattern is: (clickhouse|ch):(https|http|...)://login:password@host:port/database?prop=value. For example: "clickhouse:https://user:password@localhost:8123/mydb". When a part is missing, its default value will be used.