Error parsing SQLite statement containing operators.

[relic-yuexi]

from sql_metadata import Parser

parser = Parser("select 老年人口占比 * 人口数量 from 城市 where 人口数量 = (select max(人口数量) from 城市)")

print(parser.columns)

print(parser.tables)

[MiuNice]

I submitted a PR on this issue, which can be used before the official release.
PR: #523 .

[macbre]

Resolved by #523.