liukun4515 commented on a change in pull request #1223:
URL: https://github.com/apache/arrow-rs/pull/1223#discussion_r790373634
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File path: arrow/src/datatypes/datatype.rs
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@@ -189,6 +194,12 @@ impl fmt::Display for DataType {
}
}
+/// The maximum precision for [DataType::Decimal] values
+pub const DECIMAL_MAX_PRECISION: usize = 38;
Review comment:
In the datafusion, we use
https://github.com/apache/arrow-datafusion/blob/e92225d6f4660363eec3b1e767a188fccebb7ed9/datafusion/src/scalar.rs#L39
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