semantic-conventions/docs/database/README.md

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# Semantic conventions for database calls and systems
**Status**: [Mixed][DocumentStatus]
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](https://github.com/open-telemetry/semantic-conventions/blob/v1.24.0/docs/database/database-spans.md)
> (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.
Semantic conventions for database operations are defined for the following signals:
* [DB Spans](database-spans.md): Semantic Conventions for database client *spans*.
* [DB Metrics](database-metrics.md): Semantic Conventions for database operation *metrics*.
Technology specific semantic conventions are defined for the following databases:
* [AWS DynamoDB](dynamodb.md): Semantic Conventions for *AWS DynamoDB*.
* [Cassandra](cassandra.md): Semantic Conventions for *Cassandra*.
* [Azure Cosmos DB](cosmosdb.md): Semantic Conventions for *Azure Cosmos DB*.
* [CouchDB](couchdb.md): Semantic Conventions for *CouchDB*.
* [Elasticsearch](elasticsearch.md): Semantic Conventions for *Elasticsearch*.
* [HBase](hbase.md): Semantic Conventions for *HBase*.
* [MongoDB](mongodb.md): Semantic Conventions for *MongoDB*.
* [Microsoft SQL Server](sql-server.md): Semantic Conventions for *Microsoft SQL Server*.
* [Oracle Database](oracledb.md): Semantic Conventions for *Oracle Database*.
* [Redis](redis.md): Semantic Conventions for *Redis*.
* [SQL](sql.md): Semantic Conventions for *SQL* databases.
[DocumentStatus]: https://opentelemetry.io/docs/specs/otel/document-status