#131: Correct parentheses support in in search parsing
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Reporter: jblayloc | Owner: jblayloc
Type: defect | Status: assigned
Priority: critical | Milestone:
Component: WebSearch | Version:
Resolution: | Keywords: INSPIRE Invenio Syntax News Oct
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Comment (by simko):
Replying to [comment:15 jblayloc]:
> 2a is gibberish syntax and the query parser actually should be breaking
on it.
It is not fully gibberish: `(|kaon)` should be interpreted as a Boolean
expression inside parens, due to the presence of `|`. `|kaon` is a legal
search unit, meaning "find me <empty string> OR kaon", resulting in
everything(*). The whole query then means "find me records containing word
ellis AND NOT those containing word muon AND those containing anything".
Yes, the third term does not really matter, but it is "legal", because
`|kaon` is legal.
(*) Since we start from the record universe, as it were. Kind of like
`-kaon` returns every record not having word `kaon`. Though we could muse
whether it would not be better to treat `|kaon` as `kaon`, returning
records containing the word kaon, not everything. As Google seems to be
doing.
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Ticket URL: <http://invenio-software.org/ticket/131#comment:18>
Invenio <http://invenio-software.org>
