Snowflake - support table function in table factor (regression) (apache#1996)

Author: tomershaniii

src/dialect/snowflake.rs

@@ -515,6 +515,8 @@ impl Dialect for SnowflakeDialect {
     fn is_table_factor(&self, kw: &Keyword, parser: &mut Parser) -> bool {
         match kw {
             Keyword::LIMIT if peek_for_limit_options(parser) => false,
+            // Table function
+            Keyword::TABLE if matches!(parser.peek_token_ref().token, Token::LParen) => true,
             _ => !RESERVED_KEYWORDS_FOR_TABLE_FACTOR.contains(kw),
         }
     }

tests/sqlparser_snowflake.rs

@@ -3609,9 +3609,13 @@ fn test_sql_keywords_as_table_aliases() {
 #[test]
 fn test_sql_keywords_as_table_factor() {
     // LIMIT is a table factor, Snowflake does not reserve it
-    snowflake().one_statement_parses_to("SELECT * FROM tbl, LIMIT", "SELECT * FROM tbl, LIMIT");
+    snowflake().verified_stmt("SELECT * FROM tbl, LIMIT");
     // LIMIT is not a table factor
     snowflake().one_statement_parses_to("SELECT * FROM tbl, LIMIT 1", "SELECT * FROM tbl LIMIT 1");
+
+    // Table functions are table factors
+    snowflake().verified_stmt("SELECT 1 FROM TABLE(GENERATOR(ROWCOUNT => 10)) AS a, TABLE(GENERATOR(ROWCOUNT => 10)) AS b");
+
     // ORDER is reserved
     assert!(snowflake()
         .parse_sql_statements("SELECT * FROM tbl, order")