feat: Support Null scalar type
#133
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ovr
approved these changes
Jan 22, 2024
… to `expr` crate (apache#2257)
…ll` (apache#2364) * introduce null * fix fmt
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This PR adds support for
Nullscalar type which can be casted from any type and can be casted to any type. It also fixes an issue withCASEexpressions always having the type of the first value, which might beUtf8(NULL): now the first non-Nullexpression is picked. Related tests are modified.