Support uint64 literals (#6146)

* Support uint64 literals

It should be possible to compare numeric types to uint64 literals. Currently for anything above the int64 max, it will become a float or a decimal128 depending on config. The float conversion is lossy, and the decimal type is currently not comparable with uint64, so both of these are problematic.

* fix: fmt

---------

Co-authored-by: Andrew Lamb <[email protected]>

Author: jackkleeman

datafusion/sql/src/expr/value.rs

@@ -49,6 +49,8 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
     fn parse_sql_number(&self, n: &str) -> Result<Expr> {
         if let Ok(n) = n.parse::<i64>() {
             Ok(lit(n))
+        } else if let Ok(n) = n.parse::<u64>() {
+            Ok(lit(n))
         } else if self.options.parse_float_as_decimal {
             // remove leading zeroes
             let str = n.trim_start_matches('0');

datafusion/sql/tests/integration_test.rs

@@ -56,6 +56,11 @@ fn parse_decimals() {
             "10000000000000000000.00",
             "Decimal128(Some(1000000000000000000000),22,2)",
         ),
+        ("18446744073709551615", "UInt64(18446744073709551615)"),
+        (
+            "18446744073709551616",
+            "Decimal128(Some(18446744073709551616),38,0)",
+        ),
     ];
     for (a, b) in test_data {
         let sql = format!("SELECT {a}");