TPCH Benchmark query result invalid

When running the following query against a TPCH db I get 0 results
returned

selecto_orderpriority,count(*) as order_count
fromorders
whereo_orderdate >= date '1993-07-01'and o_orderdate < date '1993-07-01' + interval '3' monthand exists (    select
  *    from        lineitem    where        l_orderkey = o_orderkey        and l_commitdate < l_receiptdate)
 
group byo_orderpriority
order byo_orderpriority;

The same query runs correctly under mysql. Has anyone expierenced this
before?

Cronje


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