port: [#6354] isMatch adaptive expression returns error when value is null or empty string (#6426) #4343
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Fixes #4310
Description
This PR ports the changes in PR#6426 to fix the error in the isMatch built-in function when the value is null or an empty string.
Specific Changes
IsMatch
built-in function to handle empty strings and null values by the evaluator.Testing
Here we can see the new unit tests passing after the changes.