Update CHANGELOG.md and a fix last-minute review nit

Author: nickolay

CHANGELOG.md

@@ -13,6 +13,7 @@ Check https://github.com/andygrove/sqlparser-rs/commits/master for undocumented
 - Support Snowflake's `FROM (table_name)` (#155) - thanks @eyalleshem!
 
 ### Added
+- Support basic forms of `CREATE INDEX` and `DROP INDEX` (#167) - thanks @mashuai!
 - Support MSSQL `TOP (<N>) [ PERCENT ] [ WITH TIES ]` (#150) - thanks @alexkyllo!
 - Support MySQL `LIMIT row_count OFFSET offset` (not followed by `ROW` or `ROWS`) and remember which variant was parsed (#158) - thanks @mjibson!
 - Support PostgreSQL `CREATE TABLE IF NOT EXISTS table_name` (#163) - thanks @alex-dukhno!

src/dialect/keywords.rs

@@ -200,6 +200,7 @@ define_keywords!(
     IDENTITY,
     IF,
     IN,
+    INDEX,
     INDICATOR,
     INNER,
     INOUT,
@@ -420,8 +421,7 @@ define_keywords!(
     WORK,
     YEAR,
     ZONE,
-    END_EXEC = "END-EXEC",
-    INDEX
+    END_EXEC = "END-EXEC"
 );
 
 /// These keywords can't be used as a table alias, so that `FROM table_name alias`

src/parser.rs

@@ -943,9 +943,7 @@ impl Parser {
         let index_name = self.parse_object_name()?;
         self.expect_keyword("ON")?;
         let table_name = self.parse_object_name()?;
-        self.expect_token(&Token::LParen)?;
-        let columns = self.parse_comma_separated(Parser::parse_identifier)?;
-        self.expect_token(&Token::RParen)?;
+        let columns = self.parse_parenthesized_column_list(Mandatory)?;
         Ok(Statement::CreateIndex {
             name: index_name,
             table_name,