Keyword can be used to ensure that ablock of code runs to completion without by other threads.

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SQL Error: select id,body,options from ***_enewstiku where sourceid='28916' and id < 2355603 and id<>'2355603' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28916' and id > 2355603 and id<>'2355603' order by id asc limit 5