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From	Atsushi Yoshida
Subject	Too many duplicated condition query return wrong value
Date	September 3, 2015 14:55:17
Msg-id	B6593F69-AB90-444A-935A-FB0EA6226E1E@gmail.com Whole thread Raw
Responses	Re: Too many duplicated condition query return wrong value
List	pgsql-hackers
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Hi.

I cought a strange result.
I execute such query.

> SELECT "attend"."lid", "attend"."status" FROM "attend" WHERE "attend"."sid" = 325 AND "attend"."lid" IN ('ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010',
'ABF0010','ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0010', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020', 'ABF0020',
'ABF0020','ABF0020', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030',
'ABF0030','ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0030', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0040',
'ABF0040','ABF0040', 'ABF0040', 'ABF0040', 'ABF0040', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050', 'ABF0050',
'ABF0050','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060',
'ABF0060','ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060', 'ABF0060'); 


it return

>    lid   | status
> ---------+--------
>  ABF0050 |      9
>  ABF0040 |      9
>  ABF0020 |      9
>  ABF0010 |      9
>  ABF0060 |      9
> (5 rows)

This IN condition to be unique and execute it like this.

> arcvideo=> SELECT "attend"."lid", "attend"."status" FROM "attend" WHERE "attend"."sid" = 325 AND "attend"."lid" IN
('ABF0010','ABF0020', 'ABF0030', 'ABF0040', 'ABF0050', 'ABF0060’); 

It return

>    lid   | status
> ---------+--------
>  ABF0010 |      9
>  ABF0020 |      9
>  ABF0030 |      9
>  ABF0040 |      9
>  ABF0050 |      9
>  ABF0060 |      9
> (6 rows)

First query and second query are same meaning I think, but the result is different.

Why did the result?
Which log or action do I analyze it?

> arcvideo=> SELECT VERSION();
>                                                version
> ------------------------------------------------------------------------------------------------------
>  PostgreSQL 9.3.6 on x86_64-unknown-linux-gnu, compiled by gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2, 64-bit
> (1 row)

Thanks.
---
http://github.com/yalab

Atsushi YOSHIDA <rudeboyjet@gmail.com>
http://twitter.com/yalab inject your heart.
pgsql-hackers by date:
From: Bruce Momjian
Date: 03 September 2015, 14:02:21
Subject: Re: Horizontal scalability/sharding
From: Robert Haas
Date: 03 September 2015, 14:56:48
Subject: Re: Proposal: Implement failover on libpq connect level.
Too many duplicated condition query return wrong value - Mailing list pgsql-hackers

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