I have created strings like the below
&&searchtext
+sampletext
and when I try to search the following using *&&** or *+** it does not give
any result.
I am using QueryParser.escape(String s) method to handle the special
characters but does not look like it did anything.
Also, when I search some
Maybe you are not using the same analyzer at index and query time. Even
though you are correctly escaping the special query syntax characters,
either the query analyzer is removing them or your index analyzer removed
them. What analyzer are you using at index time? And, what analyzer are you
us
StandardAnalyzer both at index and search time. We use the default one and
don't have any custom analyzers.
Thanks,
Sai
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The standard analyzer should remove those ampersands and pluses, so the core
alpha terms should be matched. You would need to use the white space
analyzer or a custom analyzer to preserve such special characters.
Please give a specific indexed text string and a specific query that fails
agains
Thanks.
So, if I understand correctly, StandardAnalyzer wont work for the following
below as it strips out the special characters and does search only on
searchText ( in this case).
queryText = *&&searchText*
If we want to do a search like "*&&**" then we need to use
WhiteSpaceAnalyzer. Please l
It might be helpful if you would explain, at a higher level, what you
are trying to accomplish. Where do these things come from? What
higher-level problem are you trying to solve?
On Sun, Oct 20, 2013 at 7:12 PM, saisantoshi wrote:
> Thanks.
>
> So, if I understand correctly, StandardAnalyzer won
Right, the "Escaping Special Characters" is simply to escape query operators
like "&&" (means "AND") and "+" (which means "AND" or "MUST"). Yes, the
white space analyzer could be used, or a custom analyzer that uses the
white space tokenizer and then also uses a filter to strip out any
punctua
what about other characters like '&,'( quote) characters. We have a
requirement that a text can start with 'sampletext' and when I search with a
'* it does not return any results but instead when I search with sample*, it
does return the result.
Thanks,
Ranjith,
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Yes, other special (punctuation) characters will be preserved by the white
space analyzer, but must be escaped in query strings. You will have to
manually escape them with a backslash, since the QueryParser.escape method
will escape asterisk as well, which would disable wildcard query.
-- Jack
