date_part should be immutable.

Omega359 · Omega359 · commit bf9da4179af1 · 2026-02-19T09:58:42.000-05:00
diff --git a/datafusion/functions/src/datetime/date_part.rs b/datafusion/functions/src/datetime/date_part.rs
@@ -135,7 +135,7 @@ impl DatePartFunc {
                         Coercion::new_exact(TypeSignatureClass::Duration),
                     ]),
                 ],
-                Volatility::Stable
+                Volatility::Immutable
             ),
             aliases: vec![String::from("datepart"), String::from("extract")],
         }

Original file line number	Diff line number	Diff line change
`@@ -135,7 +135,7 @@ impl DatePartFunc {`
`135`	`135`	`Coercion::new_exact(TypeSignatureClass::Duration),`
`136`	`136`	`]),`
`137`	`137`	`],`
`138`		`- Volatility::Stable`
	`138`	`+ Volatility::Immutable`
`139`	`139`	`),`
`140`	`140`	`aliases: vec![String::from("datepart"), String::from("extract")],`
`141`	`141`	`}`