Fuzzer issue #5984 no 25

[LindsayWray]

Addresses fuzzer issue #5984 no 25. It seemed the C/C++ API query verification round trip failed when building back to string

[Mytherin]

Thanks for the PR! Looks good - one minor comment:

[PedroTadim]

The query:
con.SendQuery("SELECT 1 WHERE 1 BETWEEN (decode('a'::BLOB) COLLATE ur) AND 0;");

Still gives me an error:

ABORT THROWN BY INTERNAL EXCEPTION: Parsed statement verification failed. Query:
SELECT 1 WHERE (1 BETWEEN decode('a'::BLOB) COLLATE ur AND 0)

Error: Parser Error: syntax error at or near "COLLATE"
LINE 1: ...T 1 WHERE (1 BETWEEN decode('a'::BLOB) COLLATE ur AND 0)
                                                  ^