Exception thrown when using "filter" or "start" as alias names

[Todd102030]

Describe the bug
JSQLParser is throwing an unexpected token error with certain alias names, specifically "filter" and "start".

To Reproduce
Steps to reproduce the behavior:

1. Example SQL
   select viID as r,
   lower(concat(vName,'[]',viItem,'[]',viDesc)) as filter
   from tVendorItem vi
   inner join vendorinfo v on vi.cn=v.cn and viVendor=v.vId
   inner join tUnits u on vi.cn=u.cn and vi.viUsageUM=u.uRow
   left join tVendorItemFamily vf on vi.cn=vf.cn and vi.viId=vf.Item and vf.Family=?
   where vi.cn=@cn and (viId=? or (find_in_set(vi.Purpose,?)>0 and viInactive=0 and vf.Family>0))
   order by vName,viItem

2. Parsing this SQL using JSqlParser with this statements
   SimpleNode node = (SimpleNode) CCJSqlParserUtil.parseAST(sqlInput);

3. Exception
   Encountered unexpected token: "filter" "FILTER"
   at line 2, column 52.

Expected behavior
Expected to parse the same as all the other alias names that I've tested

System

• MySQL 8.0
• Java Version - JDK 8
• JSqlParser version - 4.1

[wumpz]

So there is a keyname conflict. I will try to make them useable. But there could be problems, when it overlaps with some other specific production.

[wumpz]

Filter keyword is now possible. Start keyword ist not possible due to clash with some other SQL variants.