Stop copying plans in LogicalPlan::with_param_values
#10016
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alamb
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Apr 9, 2024
| /// See [`Self::with_param_values`] for examples and usage | ||
| pub fn replace_params_with_values( | ||
| &self, | ||
| self, |
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Removing the & is the API change -- this allows avoiding a clone
alamb
commented
Apr 9, 2024
| expr: Expr, | ||
| param_values: &ParamValues, | ||
| ) -> Result<Expr> { | ||
| expr.transform(&|expr| { |
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rewrite_with_subqueries handles recursing into the subqueries so this is no longer necessary
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alamb
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Apr 10, 2024
| param_values: &ParamValues, | ||
| ) -> Result<LogicalPlan> { | ||
| let new_exprs = self | ||
| .expressions() |
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expressions clones Exprs
| .map(|inp| inp.replace_params_with_values(param_values)) | ||
| .collect::<Result<Vec<_>>>()?; | ||
|
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||
| self.with_new_exprs(new_exprs, new_inputs_with_values) |
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new_with_exprs also copies all the other fields of the plan, so removing it results in fewer copies too
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Thanks @andygrove and @jayzhan211 |
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Which issue does this PR close?
Part of #9637
Rationale for this change
Now that we have the nice TreeNode API that avoids copying, we can use it to
stop copying plan nodes in other places. Not only is this less code it is more
efficient.
Also helps with #8819
What changes are included in this PR?
Update
LogicalPlan::replace_params_with_valuesto take an owned LogicalPlan and rewrite it in place rather than create an entirely new planAre these changes tested?
By existing tests
Are there any user-facing changes?
LogicalPlan::replace_params_with_valuessignature now takes an owned LogicalPlan rather than internallycloneing