skoppu22 opened a new pull request #1421:
URL: https://github.com/apache/cassandra/pull/1421


   Exposing CQL metrics to a virtual table. 
   
   Below are CQL metrics from 
https://cassandra.apache.org/doc/latest/cassandra/operating/metrics.html#:~:text=org.apache.cassandra.metrics%3Atype%3DCQL,that%20are%20prepared%20vs%20unprepared.
   
   Name | Type | Description
   -- | -- | --
   PreparedStatementsCount | Gauge<Integer> | Number of cached prepared 
statements.
   PreparedStatementsEvicted | Counter | Number of prepared statements evicted 
from the prepared statement cache
   PreparedStatementsExecuted | Counter | Number of prepared statements 
executed.
   RegularStatementsExecuted | Counter | Number of non prepared statements 
executed.
   PreparedStatementsRatio | Gauge<Double> | Percentage of statements that are 
prepared vs unprepared.
   
   
   Here is the virtual table created with this diff, output from cqlsh:
   
   cqlsh> select * from system_views.cql_metrics ;
   
    name  | prepared_statements_count | prepared_statements_evicted | 
prepared_statements_executed | prepared_statements_ratio | 
regular_statements_executed
   
-------+---------------------------+-----------------------------+------------------------------+---------------------------+-----------------------------
    value |                         0 |                           0 |           
                 0 |                         0 |                          17
   


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