[optimize] init join hash table size by rows before hash table building #9732
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Proposed changes
Initialize hash table size by the tuple number instead of fixed number 1024 to reduce BuildTableExpanseTime.
test result:
After initialize table size, the total build time decreased by 8.9% on tpch 10G,
test sql:
select count(*) from lineitem join orders on l_orderkey = o_orderkey
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