Module attrs 

The parts of the star schema that every signal has in common.

OTLP’s three signals disagree about almost everything, but they all hang off the same Resource-Scope preamble and they all carry attributes in the same key/type/value shape. schema::ATTRS is already one schema for all five attribute tables; this is the matching builder, plus ResourceScope, which owns the resources / resource_attrs / scope_attrs triple that is byte-identical whether it is fronting logs, spans or data points.

Extracted from logs.rs rather than designed up front: it is shared because it turned out to be the same code three times, which is the only good reason.

Structs

AttrsBuilder

Builder for one attribute table — log, span, event, link, data point, exemplar, resource or scope. They are all the same nine columns.

DictColumn

A Dictionary<UInt16, Utf8> column that knows how full it is.

ResourceScope

The resources + resource_attrs + scope_attrs arms of the star, shared by every signal.

StrColumn

The str column of an attribute table, read through its dictionary.

Functions

index

Build a block’s crate::bloom::ATTR_IDX over every attribute table in it.

index_table 🔒

resource_kv

scope_kv

Count the attributes a request will contribute, for a headroom check.

str_column

Read column 3 of any table with the ATTRS shape.

str_values

The same, for the one caller that reaches the column by name because the table it holds may be missing it — see frame::resource_names.