Fix should regard double quote string as an ident

[git-hulk]

This closes #53

ClickHouse should always regard the double quote string as an ident, which behaves differently with MySQL or other widely used databases.

also refer: https://clickhouse.com/docs/en/sql-reference/syntax#keywords

[coveralls]

Pull Request Test Coverage Report for Build 8074568443

Details

• -2 of 41 (95.12%) changed or added relevant lines in 5 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.009%) to 56.908%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
parser/parser_table.go	10	12	83.33%

Totals
Change from base Build 8062675458:	0.009%
Covered Lines:	5478
Relevant Lines:	9626

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💛 - Coveralls