fix: union coercion coerces to string instead of number#23046
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…oercion instead of string_numeric_coercion
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Which issue does this PR close?
Rationale for this change
Aligns the behavior of coercion with
type_union_coercion.In an union of types containing both Int and String, String is a better type as all Int can be cast to String, but not all String can be cast to Int.
What changes are included in this PR?
When coercing an union that contains both strings and ints, coerce to string instead of int.
Are these changes tested?
Covered by existing tests I assume
Are there any user-facing changes?