Add support for USE SECONDARY ROLE (vs. ROLES) (apache#1637)

Author: yoavcloud

src/parser/mod.rs

@@ -10529,7 +10529,7 @@ impl<'a> Parser<'a> {
     }
 
     fn parse_secondary_roles(&mut self) -> Result<Use, ParserError> {
-        self.expect_keyword_is(Keyword::ROLES)?;
+        self.expect_one_of_keywords(&[Keyword::ROLES, Keyword::ROLE])?;
         if self.parse_keyword(Keyword::NONE) {
             Ok(Use::SecondaryRoles(SecondaryRoles::None))
         } else if self.parse_keyword(Keyword::ALL) {

tests/sqlparser_snowflake.rs

@@ -2782,6 +2782,14 @@ fn parse_use() {
     snowflake().verified_stmt("USE SECONDARY ROLES ALL");
     snowflake().verified_stmt("USE SECONDARY ROLES NONE");
     snowflake().verified_stmt("USE SECONDARY ROLES r1, r2, r3");
+
+    // The following is not documented by Snowflake but still works:
+    snowflake().one_statement_parses_to("USE SECONDARY ROLE ALL", "USE SECONDARY ROLES ALL");
+    snowflake().one_statement_parses_to("USE SECONDARY ROLE NONE", "USE SECONDARY ROLES NONE");
+    snowflake().one_statement_parses_to(
+        "USE SECONDARY ROLE r1, r2, r3",
+        "USE SECONDARY ROLES r1, r2, r3",
+    );
 }
 
 #[test]