[Qgis-user] How evaluate a string as an expression in expression builder

[Alexandre Neto]

Hello all,

Does any one know how if it's possible to evaluate an all string as an
expression in expression builder.

What I'm aiming to be able to do is to dynamicly create expression based on
other fields. So Imagine I have attribute with a string like this:

'"field_1" = 20'

Is there a way to evaluate this as an conditional expression?

Thanks,

Alexandre Neto
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