Can I use any of Vertica's analytic functions to improve this query?

I'm trying to do a little bake off between our existing Exadata installation and Vertica. I was wondering if there are Vertica specific analytic functions that would improve this query?

select s.REGION, s.FUND_CODE, sum(s.transaction_amount)  from TRANSACTIONS s where s.TRANSACTION_TYPE = 'P'
and YEAR (s.TRANSACTION_DATE) = YEAR (current_date)
group by s.REGION, s.FUND_CODE
order by s.REGION, sum(s.transaction_amount) desc
limit 10;

It's runs fine in Oracle, but in Vertica this query takes close to a minute with the YEAR function. If I remove the YEAR function it only takes 8 seconds. 

I looked at windowing but I'm not sure I have the correct use case. I'm simply looking to run an aggregation query. I have passed this through the database designer. 

Here is the explain plan

Access Path:                                                                                                                                                                                                                                                                                                                                                                                                                                                        +-SELECT  LIMIT 10 [Cost: 409K, Rows: 10] (PATH ID: 0)                                                                
|  Output Only: 10 tuples                                                                                                          
|  Execute on: Query Initiator                                                               
| +---> SORT [TOPK] [Cost: 409K, Rows: 2] (PATH ID: 1)
| |      Order: s.REPID ASC, sum(s.transaction_amount) DESC
| |      Output Only: 10 tuples                                                                                                        
| |      Execute on: All Nodes 
| | +---> GROUPBY PIPELINED (GLOBAL RESEGMENT GROUPS) [Cost: 409K, Rows: 2] (PATH ID: 2)
| | |      Aggregates: sum(s.transaction_amount)
| | |      Group By: s.REPID                                                                                                         
| | |      Execute on: All Nodes                           
| | | +---> STORAGE ACCESS for s [Cost: 369K, Rows: 1M] (PATH ID: 3)                                     
| | | |      Projection: transaction_schema.transactions_DBD_1_seg_trans_proj_b0
| | | |      Materialize: s.REPID, s.transaction_amount 
| | | |      Filter: (s.TRANSACTION_TYPE = 'P') 
| | | |      Filter: (s.REPID = '000049')
| | | |      Execute on: All Nodes