feat(optimizer): support strong util (#15373)

Co-authored-by: Zihao Xu <[email protected]>
risingwavelabs · Mar 1, 2024 · 3b0c177 · 3b0c177
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diff --git a/src/frontend/src/optimizer/plan_expr_visitor/mod.rs b/src/frontend/src/optimizer/plan_expr_visitor/mod.rs
@@ -14,6 +14,7 @@
 
 mod expr_counter;
 mod input_ref_counter;
+mod strong;
 
 pub(crate) use expr_counter::CseExprCounter;
 pub(crate) use input_ref_counter::InputRefCounter;