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posulliv/gist:91095

Created April 7, 2009 04:10
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A query plan in PostgreSQL with a hash join
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gistfile1.txt
padraig=# explain select t2.text from t1, t2 where t1.id = t2.id;
QUERY PLAN
--------------------------------------------------------------
Hash Join (cost=1.07..2.16 rows=4 width=21)
Hash Cond: (t2.id = t1.id)
-> Seq Scan on t2 (cost=0.00..1.04 rows=4 width=25)
-> Hash (cost=1.03..1.03 rows=3 width=4)
-> Seq Scan on t1 (cost=0.00..1.03 rows=3 width=4)
(5 rows)
padraig=#
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