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why this condition fail (IF 1 <> 1)


why this condition fail (IF 1 <> 1)

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Celestial
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Hi,
I am confused about belwo statment.
Although, Recovery model of TempDB can’t be changed but Why this simple IF condition fails?

IF 1 <> 1
BEGIN
ALTER DATABASE TempDB SET RECOVERY SIMPLE WITH NO_WAIT
END

please help me
GilaMonster
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Because the validity of the statement is checked before it's actually run.


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

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Eugene Elutin
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If you really want, you can code it like that:


IF 1 <> 1
BEGIN
EXEC ('ALTER DATABASE TempDB SET RECOVERY SIMPLE WITH NO_WAIT')
END



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lionofdezert
lionofdezert
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@Gila
Then why this code be executed successfully.

IF 1 <> 1
BEGIN
BACKUP DATABASE tempdb TO DISK ='D:\tempdb.bak'
END
GilaMonster
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I would guess because backup statements are checked for validity when they run. Two very different statements, you shouldn't be surprised they act differently (one's DDL the other maintenance)


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


Celestial
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Thanks Gila
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