variables - EvaluateAsExpression.

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hi,

 

a few q's if may:

  1. when configuring variable have set value, if evaluateasexpression = true , expression specified. presumably value compile-time default holds until runtime? 
  2. i have 2 execute sql tasks preceeding data flow task. precedence constraints require both exec sql tasks to have completed successfully, before data flow task can entered. each exec sql task sets variable, , 3rd variable, evaluated expression, function of 1st 2. expression re-evaluated automatically+immediately, every time 1 or both of its dependent variables' values changes? can guaranteed 3rd variable has indeed been re-evaluated before data flow entered? 
  3. per 1000 runs dozen or of following errors: 'expression variable ... failed evaluation. there error in expression.' ideas..?

1. not have set variables value, however, if relies on value of variable have set that component can validate.

2. true.

3. check setting variables , make sure there no way can populating variable wrong type of data (i.e. returning char int, etc)

 



SQL Server  >  SQL Server Integration Services



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