Module options 

Ursa’s session settings, set with SET ursa.<name> = … and shown with SHOW ursa.<name>: a DataFusion config extension with the prefix ursa.

Settings last for the session, with one exception: in a writable .ursa database, SET ursa.index_storage_limit (and RESET) is stored in the catalog file and applied again when the database is opened, because it governs what the database keeps on disk (#327). The database’s stored indexes obey the stored limit (or the default), never a session’s own: a read-only or in-memory session’s SET changes only what SHOW says.

Structs

ByteSize

A number of bytes, written as plain bytes (1048576) or with a binary unit (512KiB, 64MiB, 8GiB, 1TiB; B for bytes).

UrsaOptions

Ursa’s settings (SET ursa.<name> = …).

Enums

NoticeLevel

Which notices a session prints (ursa.notices): one line each, to the sink the host installed (crate::notices; the CLI’s is stderr).

Constants

DEFAULT_INDEX_STORAGE_LIMIT

The default ursa.index_storage_limit: 4 GiB.

Functions

index_storage_limit

The session’s ursa.index_storage_limit, in bytes: what SHOW says. The database’s stored indexes obey the database’s limit (Database::index_storage_limit), which the SQL layer keeps in step with this in a writable database.

notice_level

The session’s ursa.notices.