Range(mapping=None, *, ignore_unknown_fields=False, **kwargs)A Range represents a range of keys in a database. The keys
themselves are encoded in "sortable string format", also known as
ssformat. Consult Spanner's open source client libraries for details
on the encoding.
Each range represents a contiguous range of rows, possibly from
multiple tables/indexes. Each range is associated with a single
paxos group (known as a "group" throughout this API), a split (which
names the exact range within the group), and a generation that can
be used to determine whether a given Range represents a newer or
older location for the key range.
Attributes |
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|---|---|
| Name | Description |
start_key |
bytes
The start key of the range, inclusive. Encoded in "sortable string format" (ssformat). |
limit_key |
bytes
The limit key of the range, exclusive. Encoded in "sortable string format" (ssformat). |
group_uid |
int
The UID of the paxos group where this range is stored. UIDs are unique within the database. References Group.group_uid.
|
split_id |
int
A group can store multiple ranges of keys. Each key range is named by an ID (the split ID). Within a group, split IDs are unique. The split_id names the exact split in
group_uid where this range is stored.
|
generation |
bytes
generation indicates the freshness of the range
information contained in this proto. Generations can be
compared lexicographically; if generation A is greater than
generation B, then the Range corresponding to A is newer
than the Range corresponding to B, and should be used
preferentially.
|