move the Log, Power functions to datafusion-functions #9983
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datafusion/functions/src/math/log.rs
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| Expr::ScalarFunction(ScalarFunction { | ||
| func_def: ScalarFunctionDefinition::UDF(fun), | ||
| args, | ||
| }) if base == &args[0] && fun.name() == "power" => { |
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[Need help]
I wasn't able to figure out how to match the exact PowerFunc type here. Same for a rule in power.rs.
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I think you can do something like
let is_power = fun.as_any().downcast_ref::<PowerUDF>().is_some();If that doesn't work I can try and look more into it on Monday
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This worked with a slight modification. Thank you!
fun.as_ref().inner().as_any().downcast_ref::<PowerFunc>().is_some()
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I took a look over the normal things that catch me (monotonicity, aliases, tests) and nothing stood out - LGTM
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I noticed a few things while reviewing the code for merge conflicts and force pushed the commit a couple of times. Sorry for the partial CI re-runs. |
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Thank you so much @tinfoil-knight and @Omega359 for the review. This is a really nice piece of work and your porting of the simplify logic is quite nice 👌 .
I have a suggestion on how to avoid clone'ing in the simplify logic for your consideration: tinfoil-knight#1 (targets this PR).
However, I think we can also merge this PR as is and then rework the cloning as a follow on.
| .downcast_ref::<PowerFunc>() | ||
| .is_some() => | ||
| { | ||
| Ok(ExprSimplifyResult::Simplified(args[1].clone())) |
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It would be really nice to avoid this clone (I am working to reduce the number of times we need to clone Exprs during planning). see tinfoil-knight#1 for a suggestion
No worries -- thanks for your efforts |
Which issue does this PR close?
Closes #9875.
Rationale for this change
As part of #9285,
log&powerfunctions should be migrated to the datafusion-functions crate.What changes are included in this PR?
Log&Powerfrom built-in functions & changes to scalar UDFs.log&powerwere inter-dependent & therefore were migrated together along with tests.Are these changes tested?
Tested by existing tests which were migrated (and slightly modified).
Are there any user-facing changes?
No.