jcsherin commented on code in PR #13059:
URL: https://github.com/apache/datafusion/pull/13059#discussion_r1812524550
##########
datafusion/expr/src/window_frame.rs:
##########
@@ -479,8 +498,123 @@ mod tests {
ast::Expr::Value(ast::Value::Number("1".to_string(), false)),
)))),
};
- let result = WindowFrame::try_from(window_frame);
- assert!(result.is_ok());
+
+ let window_frame = WindowFrame::try_from(window_frame)?;
+ assert_eq!(window_frame.units, WindowFrameUnits::Rows);
+ assert_eq!(
+ window_frame.start_bound,
+ WindowFrameBound::Preceding(ScalarValue::UInt64(Some(2)))
+ );
+ assert_eq!(
+ window_frame.end_bound,
+ WindowFrameBound::Preceding(ScalarValue::UInt64(Some(1)))
+ );
+
+ Ok(())
+ }
+
+ macro_rules! test_bound {
+ ($unit:ident, $value:expr, $expected:expr) => {
+ let preceding = WindowFrameBound::try_parse(
+ ast::WindowFrameBound::Preceding($value),
+ &ast::WindowFrameUnits::$unit,
+ )?;
+ assert_eq!(preceding, WindowFrameBound::Preceding($expected));
+ let following = WindowFrameBound::try_parse(
+ ast::WindowFrameBound::Following($value),
+ &ast::WindowFrameUnits::$unit,
+ )?;
+ assert_eq!(following, WindowFrameBound::Following($expected));
+ };
+ }
+
+ macro_rules! test_bound_err {
+ ($unit:ident, $value:expr, $expected:expr) => {
+ let err = WindowFrameBound::try_parse(
+ ast::WindowFrameBound::Preceding($value),
+ &ast::WindowFrameUnits::$unit,
+ )
+ .unwrap_err();
+ assert_eq!(err.strip_backtrace(), $expected);
+ let err = WindowFrameBound::try_parse(
+ ast::WindowFrameBound::Following($value),
+ &ast::WindowFrameUnits::$unit,
+ )
+ .unwrap_err();
+ assert_eq!(err.strip_backtrace(), $expected);
+ };
+ }
+
+ #[test]
+ fn test_window_frame_bound_creation() -> Result<()> {
+ // Unbounded
+ test_bound!(Rows, None, ScalarValue::Null);
+ test_bound!(Groups, None, ScalarValue::Null);
+ test_bound!(Range, None, ScalarValue::Null);
+
+ // Numeric (Number)
+ let number = Some(Box::new(ast::Expr::Value(ast::Value::Number(
+ "42".to_string(),
+ false,
+ ))));
+ test_bound!(Rows, number.clone(), ScalarValue::UInt64(Some(42)));
+ test_bound!(Groups, number.clone(), ScalarValue::UInt64(Some(42)));
+ test_bound!(
+ Range,
+ number.clone(),
+ ScalarValue::Utf8(Some("42".to_string()))
+ );
+
+ // Numeric (SingleQuotedString)
+ let number =
Some(Box::new(ast::Expr::Value(ast::Value::SingleQuotedString(
+ "42".to_string(),
+ ))));
+ test_bound!(Rows, number.clone(), ScalarValue::UInt64(Some(42)));
+ test_bound!(Groups, number.clone(), ScalarValue::UInt64(Some(42)));
+ test_bound!(
+ Range,
+ number.clone(),
+ ScalarValue::Utf8(Some("42".to_string()))
+ );
+
+ // Non-numeric (SingleQuotedString)
+ let non_numeric = Some(Box::new(ast::Expr::Value(
+ ast::Value::SingleQuotedString("false".to_string()),
+ )));
+ test_bound_err!(
+ Rows,
+ non_numeric.clone(),
+ "Arrow error: Cast error: Cannot cast string 'false' to value of
UInt64 type"
+ );
+ test_bound_err!(
+ Groups,
+ non_numeric.clone(),
+ "Arrow error: Cast error: Cannot cast string 'false' to value of
UInt64 type"
+ );
+ test_bound!(
+ Range,
+ non_numeric.clone(),
+ ScalarValue::Utf8(Some("false".to_string()))
+ );
Review Comment:
I guess this is alright as it is existing behaviour.
When I tried a query with `RANGE INTERVAL 'false' PRECEDING` in
`datafusion-cli` (main branch) it failed like this:
```sh
type_coercion
caused by
Arrow error: Parser error: Invalid input syntax for type interval: "false"
```
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