Fix system name for MySQL (#2276)

Co-authored-by: Trask Stalnaker <trask.stalnaker@gmail.com>

.chloggen/2276.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: bug_fix
+
+# 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: Fix the `db.system.name` attribute value for MySQL which was incorrectly pointing to `microsoft.sql_server`.
+
+# 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: [ 2276 ]
+
+# (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/mysql.md

@@ -28,7 +28,7 @@ The Semantic Conventions for *MySQL* extend and override the [Database Semantic
 
 Spans representing calls to a MySQL Server adhere to the general [Semantic Conventions for Database Client Spans](database-spans.md).
 
-`db.system.name` MUST be set to `"microsoft.sql_server"` and SHOULD be provided **at span creation time**.
+`db.system.name` MUST be set to `"mysql"` and SHOULD be provided **at span creation time**.
 
 **Span kind** SHOULD be `CLIENT`.
 

model/database/spans.yaml

@@ -229,7 +229,7 @@ groups:
     brief: >
       Spans representing calls to a MySQL Server adhere to the general [Semantic Conventions for Database Client Spans](database-spans.md).
     note: |
-      `db.system.name` MUST be set to `"microsoft.sql_server"` and SHOULD be provided **at span creation time**.
+      `db.system.name` MUST be set to `"mysql"` and SHOULD be provided **at span creation time**.
     attributes:
       - ref: db.namespace
         sampling_relevant: true