Semantic conventions for database calls and systems

Status: Mixed

This document defines semantic conventions for database client spans as well as database metrics and logs.

Warning
Existing database instrumentations that are using v1.24.0 of this document (or prior):
SHOULD NOT change the version of the database conventions that they emit by default in their existing major version. Conventions include (but are not limited to) attributes, metric and span names, and unit of measure.
SHOULD introduce an environment variable OTEL_SEMCONV_STABILITY_OPT_IN in their existing major version as a comma-separated list of category-specific values (e.g., http, databases, messaging). The list of values includes:
database - emit the stable database conventions, and stop emitting the experimental database conventions that the instrumentation emitted previously.
database/dup - emit both the experimental and stable database conventions, allowing for a phased rollout of the stable semantic conventions.
The default behavior (in the absence of one of these values) is to continue emitting whatever version of the old experimental database conventions the instrumentation was emitting previously.
Note: database/dup has higher precedence than database in case both values are present
SHOULD maintain (security patching at a minimum) their existing major version for at least six months after it starts emitting both sets of conventions.
MAY drop the environment variable in their next major version and emit only the stable database conventions.