liukun4515 commented on a change in pull request #1483:
URL: https://github.com/apache/arrow-datafusion/pull/1483#discussion_r775367644
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File path: datafusion/src/physical_plan/expressions/binary.rs
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@@ -501,58 +706,6 @@ macro_rules! compute_utf8_flag_op_scalar {
}};
}
-/// Coercion rules for all binary operators. Returns the output type
-/// of applying `op` to an argument of `lhs_type` and `rhs_type`.
-fn common_binary_type(
Review comment:
move the main code to the file of `binary_rule.rs`.
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