Bug 284599: Use of REGEXP search is not consistent wrt case sensitivity

Bugzilla/DB.pm

@@ -1199,7 +1199,8 @@ formatted SQL command have prefix C<sql_>. All other methods have prefix C<bz_>.
 =item C<sql_regexp>
 
  Description: Outputs SQL regular expression operator for POSIX regex
-              searches in format suitable for a given database.
+              searches (case insensitive) in format suitable for a given
+              database.
               Abstract method, should be overriden by database specific code.
  Params:      none
  Returns:     formatted SQL for regular expression search (e.g. REGEXP)
@@ -1208,7 +1209,8 @@ formatted SQL command have prefix C<sql_>. All other methods have prefix C<bz_>.
 =item C<sql_not_regexp>
 
  Description: Outputs SQL regular expression operator for negative POSIX
-              regex searches in format suitable for a given database.
+              regex searches (case insensitive) in format suitable for a given
+              database.
               Abstract method, should be overriden by database specific code.
  Params:      none
  Returns:     formatted SQL for negative regular expression search

Bugzilla/DB/Pg.pm

@@ -87,11 +87,11 @@ sub bz_last_key {
 }
 
 sub sql_regexp {
-    return "~";
+    return "~*";
 }
 
 sub sql_not_regexp {
-    return "!~" 
+    return "!~*" 
 }
 
 sub sql_limit {

Bugzilla/Search.pm

@@ -1000,10 +1000,10 @@ sub init {
              $term = $dbh->sql_position(lc($q), "LOWER($ff)") . " = 0";
          },
          ",regexp" => sub {
-             $term = "LOWER($ff) " . $dbh->sql_regexp() . " $q";
+             $term = "$ff " . $dbh->sql_regexp() . " $q";
          },
          ",notregexp" => sub {
-             $term = "LOWER($ff) " . $dbh->sql_not_regexp() . " $q";
+             $term = "$ff " . $dbh->sql_not_regexp() . " $q";
          },
          ",lessthan" => sub {
              $term = "$ff < $q";
@@ -1506,7 +1506,7 @@ sub GetByWordList {
             $word =~ s/^'//;
             $word =~ s/'$//;
             $word = '(^|[^a-z0-9])' . $word . '($|[^a-z0-9])';
-            push(@list, "lower($field) " . $dbh->sql_regexp() . " '$word'");
+            push(@list, "$field " . $dbh->sql_regexp() . " '$word'");
         }
     }