Ignore indexes named PRIMARY within the schema_unused_indexes view, Primary Keys Are Good

Author: MarkLeith

README.md

@@ -589,6 +589,8 @@ Finds indexes that have had no events against them (and hence, no usage).
 
 To trust whether the data from this view is representative of your workload, you should ensure that the server has been up for a representative amount of time before using it.
 
+PRIMARY (key) indexes are ignored.
+
 ##### Example
 
 ```SQL

views/p_s/schema_unused_indexes.sql

@@ -22,6 +22,8 @@
  * you should ensure that the server has been up for a representative amount of
  * time before using it.
  *
+ * PRIMARY (key) indexes are ignored.
+ *
  * mysql> select * from schema_unused_indexes limit 5;
  * +-------------------------+----------------------------------------+------------+
  * | object_schema           | object_name                            | index_name |
@@ -51,4 +53,5 @@ SELECT object_schema,
  WHERE index_name IS NOT NULL
    AND count_star = 0
    AND object_schema != 'mysql'
+   AND index_name != 'PRIMARY'
  ORDER BY object_schema, object_name;