[BugFix][Postgres][#1463] The cast is bad, only when 'rowConverter' instance of the 'JdbcColumnConverter' should cast.

[FlechazoW]

Purpose of this pull request

The cast is bad, only when 'rowConverter' instance of the 'JdbcColumnConverter' should cast.

Which issue you fix

Fixes # (1463).

Checklist:

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