Support PostgreSQL's RESET SESSION AUTHORIZATION

src/ast/mod.rs

@@ -12179,13 +12179,16 @@ pub enum Reset {
     /// Resets all session parameters to their default values.
     ALL,
 
+    /// Resets session authorization to the session user.
+    SessionAuthorization,
+
     /// Resets a specific session parameter to its default value.
     ConfigurationParameter(ObjectName),
 }
 
 /// Resets a session parameter to its default value.
 /// ```sql
-/// RESET { ALL | <configuration_parameter> }
+/// RESET { ALL | SESSION AUTHORIZATION | <configuration_parameter> }
 /// ```
 #[derive(Debug, Clone, PartialEq, PartialOrd, Eq, Ord, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
@@ -12261,6 +12264,7 @@ impl fmt::Display for ResetStatement {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match &self.reset {
             Reset::ALL => write!(f, "RESET ALL"),
+            Reset::SessionAuthorization => write!(f, "RESET SESSION AUTHORIZATION"),
             Reset::ConfigurationParameter(param) => write!(f, "RESET {}", param),
         }
     }

src/parser/mod.rs

@@ -21138,6 +21138,12 @@ impl<'a> Parser<'a> {
             return Ok(ResetStatement { reset: Reset::ALL });
         }
 
+        if self.parse_keywords(&[Keyword::SESSION, Keyword::AUTHORIZATION]) {
+            return Ok(ResetStatement {
+                reset: Reset::SessionAuthorization,
+            });
+        }
+
         let obj = self.parse_object_name(false)?;
         Ok(ResetStatement {
             reset: Reset::ConfigurationParameter(obj),

tests/sqlparser_common.rs

@@ -19210,6 +19210,12 @@ fn parse_reset_statement() {
         Statement::Reset(ResetStatement { reset }) => assert_eq!(reset, Reset::ALL),
         _ => unreachable!(),
     }
+    match verified_stmt("RESET SESSION AUTHORIZATION") {
+        Statement::Reset(ResetStatement { reset }) => {
+            assert_eq!(reset, Reset::SessionAuthorization)
+        }
+        _ => unreachable!(),
+    }
 }
 
 #[test]