From 0582dbe472d9d4e26391fb7bb2d1d42e5eba4615 Mon Sep 17 00:00:00 2001
From: Janne Koschinski <janne@kuschku.de>
Date: Fri, 2 Mar 2018 00:00:14 +0100
Subject: [PATCH] Better search ranking
---
database/Database.php | 4 ++--
database/backends/PostgresSmartBackend.php | 20 ++++++++++----------
2 files changed, 12 insertions(+), 12 deletions(-)
diff --git a/database/Database.php b/database/Database.php
index 4305f4c..c067a12 100644
--- a/database/Database.php
+++ b/database/Database.php
@@ -67,7 +67,7 @@ class Database
private function apply_config(\PDOStatement $stmt)
{
- $stmt->bindValue(':config_normalization', 32, PDO::PARAM_INT);
+ $stmt->bindValue(':config_normalization', 4, PDO::PARAM_INT);
$stmt->bindValue(':weight_content', 14, PDO::PARAM_INT);
$stmt->bindValue(':weight_type', 16, PDO::PARAM_INT);
@@ -262,4 +262,4 @@ class Database
$stmt->execute();
return $stmt->fetchAll(\PDO::FETCH_ASSOC);
}
-}
\ No newline at end of file
+}
diff --git a/database/backends/PostgresSmartBackend.php b/database/backends/PostgresSmartBackend.php
index 5e2ce1f..b47376e 100644
--- a/database/backends/PostgresSmartBackend.php
+++ b/database/backends/PostgresSmartBackend.php
@@ -68,13 +68,13 @@ class PostgresSmartBackend implements Backend
backlog.message,
query,
(
- (ts_rank(tsv, query, :config_normalization) ^ :weight_content) *
+ (ts_rank_cd(tsv, query, :config_normalization) ^ :weight_content) *
((CASE
WHEN TYPE IN (1, 4) THEN 1.0
- WHEN TYPE IN (2, 1024, 2048, 4096, 16384) THEN 0.75
- WHEN TYPE IN (32, 64, 128, 256, 512, 32768, 65536) THEN 0.5
- WHEN TYPE IN (8, 16, 8192, 131072) THEN 0.25
- ELSE 0.1 END) ^ :weight_type) *
+ WHEN TYPE IN (2, 1024, 2048, 4096, 16384) THEN 0.8
+ WHEN TYPE IN (32, 64, 128, 256, 512, 32768, 65536) THEN 0.6
+ WHEN TYPE IN (8, 16, 8192, 131072) THEN 0.4
+ ELSE 0.2 END) ^ :weight_type) *
((1 / (EXTRACT(EPOCH FROM CURRENT_TIMESTAMP) - EXTRACT(EPOCH FROM TIME))) ^ :weight_time)
) AS rank_value
FROM
@@ -142,13 +142,13 @@ class PostgresSmartBackend implements Backend
backlog.message,
query,
(
- (ts_rank(tsv, query, :config_normalization) ^ :weight_content) *
+ (ts_rank_cd(tsv, query, :config_normalization) ^ :weight_content) *
((CASE
WHEN TYPE IN (1, 4) THEN 1.0
- WHEN TYPE IN (2, 1024, 2048, 4096, 16384) THEN 0.75
- WHEN TYPE IN (32, 64, 128, 256, 512, 32768, 65536) THEN 0.5
- WHEN TYPE IN (8, 16, 8192, 131072) THEN 0.25
- ELSE 0.1 END) ^ :weight_type) *
+ WHEN TYPE IN (2, 1024, 2048, 4096, 16384) THEN 0.8
+ WHEN TYPE IN (32, 64, 128, 256, 512, 32768, 65536) THEN 0.6
+ WHEN TYPE IN (8, 16, 8192, 131072) THEN 0.4
+ ELSE 0.2 END) ^ :weight_type) *
((1 / (EXTRACT(EPOCH FROM CURRENT_TIMESTAMP) - EXTRACT(EPOCH FROM TIME))) ^ :weight_time)
) AS rank_value
FROM
--
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