refactor

src/main/java/com/alibaba/druid/sql/dialect/mysql/ast/statement/MySqlAlterTableStatement.java

@@ -0,0 +1,8 @@
+package com.alibaba.druid.sql.dialect.mysql.ast.statement;
+
+
+public class MySqlAlterTableStatement extends MySqlStatementImpl {
+
+    private static final long serialVersionUID = 1L;
+
+}

src/main/java/com/alibaba/druid/sql/dialect/mysql/parser/MySqlStatementParser.java

@@ -1785,4 +1785,9 @@ public class MySqlStatementParser extends SQLStatementParser {
 
         return null;
     }
+    
+    public SQLSetStatement parseAlter() {
+        accept(Token.ALTER);
+        throw new ParserException("TODO " + lexer.token() + " " + lexer.stringVal());
+    }
 }