Unexpected side effects may possibly be generated by a modification in your T-SQL Code.
They could appear any time in the cycle, even after they are in production, and are costly to resolve.
To avoid side effect issues, each modification should go through an Impact Analysis.
It is not always conducted as time often lacks. When the Impact analysis is led on T-SQL Stored Procedure, it is usually a time consuming process done manually and only partially reliable.
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