How could I rewrite the following query so it runs faster:

select distinct location from blockunit where blockid in (
  select bu.blockid from blockunit bu inner join interactionparts ip on
(bu.blockid = ip.part) 
  where ip.blockid in 
 
(110936,110937,111641,111642,113140,113141,114925,114926,121161,121162,124087,
  124088,124562,124563,133358,133359,133409,133410,135304,135305,136096)
  union 
  select bu.blockid from blockunit bu 
  where bu.blockid in 
 
(110936,110937,111641,111642,113140,113141,114925,114926,121161,121162,124087,
  124088,124562,124563,133358,133359,133409,133410,135304,135305,136096)
)

Thanks in advance,

Yves



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