How do I SET DATEFIRST 1 with PetaPoco in a Query or manage pooled connections -

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i have query groups results week. in order ensure consistent week start trying add first line peta poco db.query(sql) method.

set datefirst 1 select     count(logdate) value,     dateadd(week, datediff(week,0, logdate),0) [date]     ... etc ...

without set datefirst 1 petapoco generates like... 

exec sp_executesql n'                    select                           count(logdate) value,                     dateadd(week, datediff(week,0, logdate),0) [date]                                 ... etc ...

with set datefirst 1 petapoco generates like...

exec sp_executesql n'select [datapoint].[date], [datapoint].[value] [datapoint]                     set datefirst 1                 select                     count(logdate) value,                     dateadd(week, datediff(week,0, logdate),0) [date]                                 ... etc ...

how around generating incorrect sql? docs looks can use db.execute("set datefirst 1"); long executes on same connection, since connections managed me, need ensure it's same connection query?

put semicolon first char tell petapoco execute query is

  db.execute(";set datefirst 1 ....

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