corasaurus-hex commented on code in PR #18557:
URL: https://github.com/apache/datafusion/pull/18557#discussion_r2507366558


##########
datafusion/physical-expr/src/expressions/literal.rs:
##########
@@ -137,6 +137,7 @@ impl PhysicalExpr for Literal {
 }
 
 /// Create a literal expression
+#[allow(clippy::needless_pass_by_value)]

Review Comment:
   I wasn't sure about this one. Changing this to be `&T` produced 284 errors 
spread across the following files:
   
   ```
   1 error(s)    datafusion/physical-expr/src/planner.rs
   2 error(s)    datafusion/physical-expr/src/expressions/literal.rs
   3 error(s)    datafusion/physical-expr/src/simplifier/mod.rs
   4 error(s)    datafusion/physical-expr/src/utils/mod.rs
   5 error(s)    datafusion/physical-expr/src/equivalence/class.rs
   6 error(s)    datafusion/physical-expr/src/expressions/dynamic_filters.rs
   18 error(s)   datafusion/physical-expr/src/simplifier/unwrap_cast.rs
   22 error(s)   datafusion/physical-expr/src/expressions/binary.rs
   62 error(s)   datafusion/physical-expr/src/expressions/in_list.rs
   79 error(s)   datafusion/physical-expr/src/expressions/case.rs
   82 error(s)   datafusion/physical-expr/src/expressions/in_list.rs
   ```



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