[PATCH 4/9] lei q: enable expensive Xapian flags

[Eric Wong]

FLAG_PURE_NOT is too expensive for public-facing WWW use, but
lei isn't public-facing.  We'll also unconditionally enable
phrase search on old "chert" DBs since lei doesn't need to
worry about fairness across 10K users.
---
 lib/PublicInbox/LeiSearch.pm | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/PublicInbox/LeiSearch.pm b/lib/PublicInbox/LeiSearch.pm
index 1fb38da1d7aa..d0ca13f0aa11 100644
--- a/lib/PublicInbox/LeiSearch.pm
+++ b/lib/PublicInbox/LeiSearch.pm
@@ -175,6 +175,8 @@ sub all_terms {
 sub qparse_new {
        my ($self) = @_;
        my $qp = $self->SUPER::qparse_new; # PublicInbox::Search
+       $self->{qp_flags} |= PublicInbox::Search::FLAG_PHRASE() |
+                               PublicInbox::Search::FLAG_PURE_NOT();
        $qp->add_boolean_prefix('kw', 'K');
        $qp->add_boolean_prefix('L', 'L');
        $qp
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