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From "Gus Heck (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SOLR-10894) Streaming expressions handling of escaped special characters bug
Date Mon, 22 Oct 2018 14:27:00 GMT

    [ https://issues.apache.org/jira/browse/SOLR-10894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16659039#comment-16659039
] 

Gus Heck commented on SOLR-10894:
---------------------------------

My testing seems to indicate that this is now working at the expression parser level, though
the annotate seems to say the relevant code came in in 2015, so maybe this crops up as a
url encoding issue when we distribute the query (note the '+' )? Attaching patch verifying
this works at the expression level in java (minus the illegal escape sequence) Also note that
the supplied slash escaped expression doesn't work in java since \+ isn't a legal escape
sequence

> Streaming expressions handling of escaped special characters bug
> ----------------------------------------------------------------
>
>                 Key: SOLR-10894
>                 URL: https://issues.apache.org/jira/browse/SOLR-10894
>             Project: Solr
>          Issue Type: Bug
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: streaming expressions
>            Reporter: Houston Putman
>            Priority: Major
>         Attachments: SOLR-10894.patch
>
>
> Streaming expressions expect all special characters in named parameter values to be singly
escaped. Since queries can contain strings surrounded by double quotes, double-escaping is
necessary.
> Given the following query: 
> {{summary:"\"This is a summary\"\+"}}
> A streaming expression would require surrounding the query with double quotes, therefore
every special character in the query should be escaped: 
> {{select(collection,q="\"\\\"This is a summary\\\"\\\+\"",....)}}
> Streaming expressions should unescape the strings contained within double quotes, however
currently they are only unescaping {{\" -> "}}. Therefore it is impossible to query for
text fields containing double quotes. Also other special characters are not unescaped; this
inconsistency causes confusion.



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