Snowflake: Numeric prefix for stage name part (apache#1966)

Author: yoavcloud

src/dialect/snowflake.rs

@@ -841,6 +841,7 @@ pub fn parse_stage_name_identifier(parser: &mut Parser) -> Result<Ident, ParserE
             Token::Mod => ident.push('%'),
             Token::Div => ident.push('/'),
             Token::Plus => ident.push('+'),
+            Token::Number(n, _) => ident.push_str(n),
             Token::Word(w) => ident.push_str(&w.to_string()),
             _ => return parser.expected("stage name identifier", parser.peek_token()),
         }

tests/sqlparser_snowflake.rs

@@ -2640,7 +2640,7 @@ fn test_snowflake_copy_into() {
     }
 
     // Test for non-ident characters in stage names
-    let sql = "COPY INTO a.b FROM @namespace.stage_name/x@x~x%x+";
+    let sql = "COPY INTO a.b FROM @namespace.stage_name/x@x~x%x+/20250723_data";
     assert_eq!(snowflake().verified_stmt(sql).to_string(), sql);
     match snowflake().verified_stmt(sql) {
         Statement::CopyIntoSnowflake { into, from_obj, .. } => {
@@ -2652,7 +2652,7 @@ fn test_snowflake_copy_into() {
                 from_obj,
                 Some(ObjectName::from(vec![
                     Ident::new("@namespace"),
-                    Ident::new("stage_name/x@x~x%x+")
+                    Ident::new("stage_name/x@x~x%x+/20250723_data")
                 ]))
             )
         }