Remove redis database index from redis span name (#1565)

Co-authored-by: Liudmila Molkova <limolkova@microsoft.com>

.chloggen/1565.yaml

@@ -0,0 +1,22 @@
+# Use this changelog template to create an entry for release notes.
+#
+# If your change doesn't affect end users you should instead start
+# your pull request title with [chore] or use the "Skip Changelog" label.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: breaking
+
+# The name of the area of concern in the attributes-registry, (e.g. http, cloud, db)
+component: db
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Remove redis database index from the redis span name.
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+# The values here must be integers.
+issues: [ 1449 ]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:

docs/database/redis.md

@@ -10,6 +10,12 @@ The Semantic Conventions for [Redis](https://redis.com/) extend and override the
 
 `db.system` MUST be set to `"redis"` and SHOULD be provided **at span creation time**.
 
+## Span name
+
+Redis spans SHOULD follow the general [database span name convention](./database-spans.md#name),
+except that `db.namespace` SHOULD NOT be used in the span name since it is a numeric value that ends up
+looking confusing.
+
 ## Attributes
 
 <!-- semconv span.db.redis.client -->