Searching with odd chars

[Robert Pohl <ro...@f-i.com>]

Hi List!

Another question regarding the standard analyzer:

If I search for "adidas - dream big" which is the exact title of a indexed
item, it does not show up in the hits. It does if I remove the "-". Should
it not trigger on the other words it the analyzer removes the "-" ?

Thanks

//rob

ROBERT POHL
Senior Application Developer • Fi Stockholm
 
T: +46 8 402 17 40
robert.pohl@f-i.com  /  www.f-i.com
 
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-----Original Message-----
From: Sudhanya Chatterjee [mailto:sudhanya_chatterjee@persistent.co.in] 
Sent: den 30 maj 2008 10:28
To: lucene-net-user@incubator.apache.org
Subject: Query with wildcard characters

Hi,

How to create queries of the following type using query parser (for
tokenized as well as untokenized fields) - 

 

Sudhanya Chat*

 

In the result I want all fields which start with "Sudhanya Chat".

But if I create a query - Query qry = queryParse.Parse("productName:
Sudhanya Chat*");

I get fields which are just starting with "Chat".

I have tried both - keyword and standard Analyzer.

How do I achieve the above mentioned kind of behaviour?

 

Thanks,

Sudhanya

 


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7:53 PM

Re: Searching with odd chars

[Karl Geppert <ka...@chemwatch.net>]

You should also be able to query.escape that phrase to escape all the 
command characters shouldn't you?

We use a custom escape function so that you can still pass wildcards through

private static string replaceAll(string In, string pcFrom)
{
string outstring = "";
int i;

for (i = 0; i < In.Length; i++)
{
if (pcFrom.IndexOf(In[i]) > -1)
outstring = outstring + "\\" + In[i];
else
outstring = outstring + In[i];
}

return (outstring);
} //replaceAll

public static string escape(string userInput)
{
//Note * is not on this as it is still active as a wildcard and we 
therefore do not want to escape it.
return (replaceAll(userInput, "+-!:^{}~?"));

/*// Some constants.
String LUCENE_ESCAPE_CHARS = "[\\\\+\\-\\!\\(\\)\\:\\^\\]\\{\\}\\~\\*\\?]";
Pattern LUCENE_PATTERN = Pattern.compile(LUCENE_ESCAPE_CHARS);
String REPLACEMENT_STRING = "\\\\$0";
// ... Then, in your code somewhere...
String escaped = 
LUCENE_PATTERN.matcher(userInput).replaceAll(REPLACEMENT_STRING);
Query query = QueryParser.parse(escaped);
*/
}

Robert Pohl wrote:
> Hi List!
>
> Another question regarding the standard analyzer:
>
> If I search for "adidas - dream big" which is the exact title of a indexed
> item, it does not show up in the hits. It does if I remove the "-". Should
> it not trigger on the other words it the analyzer removes the "-" ?
>
> Thanks
>
> //rob
>
> ROBERT POHL
> Senior Application Developer • Fi Stockholm
>  
> T: +46 8 402 17 40
> robert.pohl@f-i.com  /  www.f-i.com
>  
> This communication is confidential and is only intended for
> the use of the individual or entity to which it is directed.
> It may contain information that is privileged and exempt from
> disclosure under applicable law. If you are not the Intended
> recipient, please notify us immediately. You should not copy
> it or disclose its content to any other person.
>
>
> -----Original Message-----
> From: Sudhanya Chatterjee [mailto:sudhanya_chatterjee@persistent.co.in] 
> Sent: den 30 maj 2008 10:28
> To: lucene-net-user@incubator.apache.org
> Subject: Query with wildcard characters
>
> Hi,
>
> How to create queries of the following type using query parser (for
> tokenized as well as untokenized fields) - 
>
>  
>
> Sudhanya Chat*
>
>  
>
> In the result I want all fields which start with "Sudhanya Chat".
>
> But if I create a query - Query qry = queryParse.Parse("productName:
> Sudhanya Chat*");
>
> I get fields which are just starting with "Chat".
>
> I have tried both - keyword and standard Analyzer.
>
> How do I achieve the above mentioned kind of behaviour?
>
>  
>
> Thanks,
>
> Sudhanya
>
>  
>
>
> DISCLAIMER
> ==========
> This e-mail may contain privileged and confidential information which is the
> property of Persistent Systems Ltd. It is intended only for the use of the
> individual or entity to which it is addressed. If you are not the intended
> recipient, you are not authorized to read, retain, copy, print, distribute
> or use this message. If you have received this communication in error,
> please notify the sender and delete all copies of this message. Persistent
> Systems Ltd. does not accept any liability for virus infected mails.
>
> No virus found in this incoming message.
> Checked by AVG. 
> Version: 8.0.100 / Virus Database: 269.24.4/1473 - Release Date: 5/29/2008
> 7:53 PM
>
>
> _____________________________________________________________________
>
> This message has been checked for all known viruses by the 
> MessageLabs Virus Scanning Service. For further information visit
> http://www.messagelabs.com
> ________________________________________________________________________
>   


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