alamb commented on issue #8051:
URL:
https://github.com/apache/arrow-datafusion/issues/8051#issuecomment-1855953090
I think the trick here will be to ensure we can still serialize such
"precompiled" functions
What I was thinking was maybe we can make a new `PhysicalExpr` that is like
```rust
/// A function that is "precompiled" in some way
/// for example, for a regular expression that has a constant argument
/// constant can be pre-compiled into a Regexpr match instance once per query
/// rather than once per batch
///
/// Somtimes precompiling make it hard/impossible to serialize the function
again (e.g. the prepared regular expressions)
/// so this structure contains the original PhysicalExpr that can be used to
serialize the function
struct PrecompiledExpr {
precompiled: Arc<dyn PhysicalExpr>,
original: Arc<dyn PhysicalExpr>
}
```
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