Fixed parse query with escaped email value

[chapsuk]

Hi there 👋

We catch an error on exec query like that

sql> delete from table where email = 'foo''[email protected]' and created_at = '2020-12-21 ....'

Error: [42601] Syntax error at or near "2020"

The PR changes fixed this problem

[CLAassistant]

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[sitingren]

@chapsuk Thank you for your contribution!