From 5a7981bbfcf51569e5f59fd75d89ea838f681e75 Mon Sep 17 00:00:00 2001
From: "myk%mozilla.org" <>
Date: Fri, 15 Jul 2005 09:05:08 +0000
Subject: Fix for bug 232612: enables boolean mode fulltext searches for better
 searching capabilities in the "Find a Specific Bug" page; r=lpsolit

---
 Bugzilla/DB.pm       | 25 +++++++++++++------------
 Bugzilla/DB/Mysql.pm | 13 ++++++++++++-
 Bugzilla/Search.pm   |  6 ++----
 3 files changed, 27 insertions(+), 17 deletions(-)

diff --git a/Bugzilla/DB.pm b/Bugzilla/DB.pm
index 76e090d6c..f3b9e4ed9 100644
--- a/Bugzilla/DB.pm
+++ b/Bugzilla/DB.pm
@@ -257,22 +257,23 @@ sub sql_fulltext_search {
 
     # This is as close as we can get to doing full text search using
     # standard ANSI SQL, without real full text search support. DB specific
-    # modules shoud override this, as this will be always much slower.
-
-    # the text is already sql-quoted, so we need to remove the quotes first
-    my $quote = substr($self->quote(''), 0, 1);
-    $text = $1 if ($text =~ /^$quote(.*)$quote$/);
+    # modules should override this, as this will be always much slower.
 
     # make the string lowercase to do case insensitive search
     my $lower_text = lc($text);
 
-    # split the text we search for to separate words
+    # split the text we search for into separate words
     my @words = split(/\s+/, $lower_text);
 
-    # search for occurence of all specified words in the column
-    return "CASE WHEN (LOWER($column) LIKE ${quote}%" .
-           join("%${quote} AND LOWER($column) LIKE ${quote}%", @words) .
-           "%${quote}) THEN 1 ELSE 0 END";
+    # surround the words with wildcards and SQL quotes so we can use them
+    # in LIKE search clauses
+    @words = map($self->quote("%$_%"), @words);
+
+    # turn the words into a set of LIKE search clauses
+    @words = map("LOWER($column) LIKE $_", @words);
+
+    # search for occurrences of all specified words in the column
+    return "CASE WHEN (" . join(" AND ", @words) . ") THEN 1 ELSE 0 END";
 }
 
 #####################################################################
@@ -1159,12 +1160,12 @@ formatted SQL command have prefix C<sql_>. All other methods have prefix C<bz_>.
               specified text on a given column.
               There is a ANSI SQL version of this method implemented using
               LIKE operator, but it's not a real full text search. DB specific
-              modules shoud override this, as this generic implementation will
+              modules should override this, as this generic implementation will
               be always much slower. This generic implementation returns
               'relevance' as 0 for no match, or 1 for a match.
  Params:      $column = name of column to search (scalar)
               $text = text to search for (scalar)
- Returns:     formatted SQL for for full text search
+ Returns:     formatted SQL for full text search
 
 =item C<sql_istrcmp>
 
diff --git a/Bugzilla/DB/Mysql.pm b/Bugzilla/DB/Mysql.pm
index 77127630c..25c3d5f3d 100644
--- a/Bugzilla/DB/Mysql.pm
+++ b/Bugzilla/DB/Mysql.pm
@@ -42,6 +42,7 @@ package Bugzilla::DB::Mysql;
 
 use strict;
 
+use Bugzilla::Util;
 use Bugzilla::Error;
 
 # This module extends the DB interface via inheritance
@@ -108,7 +109,17 @@ sub sql_string_concat {
 sub sql_fulltext_search {
     my ($self, $column, $text) = @_;
 
-    return "MATCH($column) AGAINST($text)";
+    # Add the boolean mode modifier if the search string contains
+    # boolean operators.
+    my $mode = ($text =~ /[+-<>()~*"]/ ? "IN BOOLEAN MODE" : "");
+
+    # quote the text for use in the MATCH AGAINST expression
+    $text = $self->quote($text);
+
+    # untaint the text, since it's safe to use now that we've quoted it
+    trick_taint($text);
+
+    return "MATCH($column) AGAINST($text $mode)";
 }
 
 sub sql_istring {
diff --git a/Bugzilla/Search.pm b/Bugzilla/Search.pm
index 710334049..96f38fc06 100644
--- a/Bugzilla/Search.pm
+++ b/Bugzilla/Search.pm
@@ -582,10 +582,8 @@ sub init {
              # $term1 searches comments.
              # $term2 searches summaries, which contributes to the relevance
              # ranking in SELECT but doesn't limit which bugs get retrieved.
-             my $term1 = $dbh->sql_fulltext_search("${table}.thetext",
-                                                   ::SqlQuote($v));
-             my $term2 = $dbh->sql_fulltext_search("bugs.short_desc",
-                                                   ::SqlQuote($v));
+             my $term1 = $dbh->sql_fulltext_search("${table}.thetext", $v);
+             my $term2 = $dbh->sql_fulltext_search("bugs.short_desc", $v);
 
              # The term to use in the WHERE clause.
              $term = "$term1 > 0";
-- 
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