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- Patch #146466 by douggreen, Steven et al: Remove temporary table usage from search module

6.x
Dries Buytaert 2007-11-13 14:04:08 +00:00
parent f68f525401
commit 17d1527e3d
6 changed files with 291 additions and 122 deletions
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81
modules/node/node.module
View File

@ -1017,15 +1017,12 @@ function node_search($op = 'search', $keys = NULL) {
return t('Content');
case 'reset':
variable_del('node_cron_last');
variable_del('node_cron_last_nid');
db_query("UPDATE {search_dataset} SET reindex = %d AND type = 'node'", time());
return;
case 'status':
$last = variable_get('node_cron_last', 0);
$last_nid = variable_get('node_cron_last_nid', 0);
$total = db_result(db_query('SELECT COUNT(*) FROM {node} WHERE status = 1'));
$remaining = db_result(db_query('SELECT COUNT(*) FROM {node} n LEFT JOIN {node_comment_statistics} c ON n.nid = c.nid WHERE n.status = 1 AND ((GREATEST(n.created, n.changed, c.last_comment_timestamp) = %d AND n.nid > %d ) OR (n.created > %d OR n.changed > %d OR c.last_comment_timestamp > %d))', $last, $last_nid, $last, $last, $last));
$remaining = db_result(db_query("SELECT COUNT(*) FROM {node} n LEFT JOIN {search_dataset} d ON d.type = 'node' AND d.sid = n.nid WHERE d.sid IS NULL OR d.reindex <> 0"));
return array('remaining' => $remaining, 'total' => $total);
case 'admin':
@ -1097,7 +1094,7 @@ function node_search($op = 'search', $keys = NULL) {
$ranking[] = '%d * POW(2, (GREATEST(n.created, n.changed, c.last_comment_timestamp) - %d) * 6.43e-8)';
$arguments2[] = $weight;
$arguments2[] = (int)variable_get('node_cron_last', 0);
$join2 .= ' INNER JOIN {node} n ON n.nid = i.sid LEFT JOIN {node_comment_statistics} c ON c.nid = i.sid';
$join2 .= ' LEFT JOIN {node_comment_statistics} c ON c.nid = i.sid';
$stats_join = TRUE;
$total += $weight;
}
@ -1546,62 +1543,52 @@ function node_page_view($node, $cid = NULL) {
return node_show($node, $cid);
}
/**
* shutdown function to make sure we always mark the last node processed.
*/
function node_update_shutdown() {
global $last_change, $last_nid;
if ($last_change && $last_nid) {
variable_set('node_cron_last', $last_change);
variable_set('node_cron_last_nid', $last_nid);
}
}
/**
* Implementation of hook_update_index().
*/
function node_update_index() {
global $last_change, $last_nid;
register_shutdown_function('node_update_shutdown');
$last = variable_get('node_cron_last', 0);
$last_nid = variable_get('node_cron_last_nid', 0);
$limit = (int)variable_get('search_cron_limit', 100);
// Store the maximum possible comments per thread (used for ranking by reply count)
variable_set('node_cron_comments_scale', 1.0 / max(1, db_result(db_query('SELECT MAX(comment_count) FROM {node_comment_statistics}'))));
variable_set('node_cron_views_scale', 1.0 / max(1, db_result(db_query('SELECT MAX(totalcount) FROM {node_counter}'))));
$result = db_query_range('SELECT GREATEST(IF(c.last_comment_timestamp IS NULL, 0, c.last_comment_timestamp), n.changed) as last_change, n.nid FROM {node} n LEFT JOIN {node_comment_statistics} c ON n.nid = c.nid WHERE n.status = 1 AND ((GREATEST(n.changed, c.last_comment_timestamp) = %d AND n.nid > %d) OR (n.changed > %d OR c.last_comment_timestamp > %d)) ORDER BY GREATEST(n.changed, c.last_comment_timestamp) ASC, n.nid ASC', $last, $last_nid, $last, $last, 0, $limit);
$result = db_query_range("SELECT n.nid FROM {node} n LEFT JOIN {search_dataset} d ON d.type = 'node' AND d.sid = n.nid WHERE d.sid IS NULL OR d.reindex <> 0 ORDER BY d.reindex ASC, n.nid ASC", 0, $limit);
while ($node = db_fetch_object($result)) {
$last_change = $node->last_change;
$last_nid = $node->nid;
$node = node_load($node->nid);
// Build the node body.
$node->build_mode = NODE_BUILD_SEARCH_INDEX;
$node = node_build_content($node, FALSE, FALSE);
$node->body = drupal_render($node->content);
// Allow modules to modify the fully-built node.
node_invoke_nodeapi($node, 'alter');
$text = '<h1>'. check_plain($node->title) .'</h1>'. $node->body;
// Fetch extra data normally not visible
$extra = node_invoke_nodeapi($node, 'update index');
foreach ($extra as $t) {
$text .= $t;
}
// Update index
search_index($node->nid, 'node', $text);
_node_index_node($node);
}
}
/**
* Index a single node.
*
* @param $node
* The node to index.
*/
function _node_index_node($node) {
$node = node_load($node->nid);
// save the changed time of the most recent indexed node, for the search results half-life calculation
variable_set('node_cron_last', $node->changed);
// Build the node body.
$node->build_mode = NODE_BUILD_SEARCH_INDEX;
$node = node_build_content($node, FALSE, FALSE);
$node->body = drupal_render($node->content);
$text = '<h1>'. check_plain($node->title) .'</h1>'. $node->body;
// Fetch extra data normally not visible
$extra = node_invoke_nodeapi($node, 'update index');
foreach ($extra as $t) {
$text .= $t;
}
// Update index
search_index($node->nid, 'node', $text);
}
/**
* Implementation of hook_form_alter().
*/

56
modules/search/search.install
View File

@ -47,6 +47,13 @@ function search_schema() {
'size' => 'big',
'description' => t('List of space-separated words from the item.'),
),
'reindex' => array(
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
'default' => 0,
'description' => t('Set to force node reindexing.'),
),
),
'indexes' => array('sid_type' => array('sid', 'type')),
);
@ -74,19 +81,6 @@ function search_schema() {
'not null' => FALSE,
'description' => t('The {search_dataset}.type of the searchable item to which the word belongs.'),
),
'fromsid' => array(
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
'default' => 0,
'description' => t('The {search_dataset}.sid of the referring link to this item.'),
),
'fromtype' => array(
'type' => 'varchar',
'length' => 16,
'not null' => FALSE,
'description' => t('The {search_dataset}.type of the referring link to this item.'),
),
'score' => array(
'type' => 'float',
'not null' => FALSE,
@ -94,10 +88,10 @@ function search_schema() {
),
),
'indexes' => array(
'from_sid_type' => array('fromsid', 'fromtype'),
'sid_type' => array('sid', 'type'),
'word' => array('word')
),
'unique keys' => array('word_sid_type' => array('word', 'sid', 'type')),
);
$schema['search_total'] = array(
@ -119,6 +113,40 @@ function search_schema() {
'primary key' => array('word'),
);
$schema['search_node_links'] = array(
'fields' => array(
'sid' => array(
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
'default' => 0,
'description' => t('The {search_dataset}.sid of the searchable item to which the word belongs.'),
),
'type' => array(
'type' => 'varchar',
'length' => 16,
'not null' => TRUE,
'default' => '',
'description' => t('The {search_dataset}.sid of the searchable item to which the word belongs.'),
),
'nid' => array(
'type' => 'int',
'unsigned' => TRUE,
'not null' => TRUE,
'default' => 0,
'description' => t('The {node}.nid that this item links to.'),
),
'caption' => array(
'type' => 'text',
'size' => 'big',
'not null' => FALSE,
'description' => t('The text used to link to the {node}.nid.'),
),
),
'primary key' => array('sid', 'type', 'nid'),
'indexes' => array('nid' => array('nid')),
);
return $schema;
}

212
modules/search/search.module
View File

@ -233,9 +233,11 @@ function search_wipe($sid = NULL, $type = NULL, $reindex = FALSE) {
}
else {
db_query("DELETE FROM {search_dataset} WHERE sid = %d AND type = '%s'", $sid, $type);
db_query("DELETE FROM {search_index} WHERE fromsid = %d AND fromtype = '%s'", $sid, $type);
// When re-indexing, keep link references
db_query("DELETE FROM {search_index} WHERE sid = %d AND type = '%s'". ($reindex ? " AND fromsid = 0" : ''), $sid, $type);
db_query("DELETE FROM {search_index} WHERE sid = %d AND type = '%s'", $sid, $type);
// Don't remove links if re-indexing.
if (!$reindex) {
db_query("DELETE FROM {search_node_links} WHERE sid = %d AND type = '%s'", $sid, $type);
}
}
}
@ -531,21 +533,24 @@ function search_index($sid, $type, $text) {
$word = (int)ltrim($word, '-0');
}
// Links score mainly for the target.
if ($link) {
if (!isset($results[$linknid])) {
$results[$linknid] = array();
}
$results[$linknid][$word] += $score * $focus;
$results[$linknid][] = $word;
// Reduce score of the link caption in the source.
$focus *= 0.2;
}
else {
if (!isset($results[0][$word])) {
$results[0][$word] = 0;
}
$results[0][$word] += $score * $focus;
// Focus is a decaying value in terms of the amount of unique words up to this point.
// From 100 words and more, it decays, to e.g. 0.5 at 500 words and 0.3 at 1000 words.
$focus = min(1, .01 + 3.5 / (2 + count($results[0]) * .015));
// Fall-through
if (!isset($results[0][$word])) {
$results[0][$word] = 0;
}
$results[0][$word] += $score * $focus;
// Focus is a decaying value in terms of the amount of unique words up to this point.
// From 100 words and more, it decays, to e.g. 0.5 at 500 words and 0.3 at 1000 words.
$focus = min(1, .01 + 3.5 / (2 + count($results[0]) * .015));
}
$tagwords++;
// Too many words inside a single tag probably mean a tag was accidentally left open.
@ -562,7 +567,7 @@ function search_index($sid, $type, $text) {
search_wipe($sid, $type, TRUE);
// Insert cleaned up data into dataset
db_query("INSERT INTO {search_dataset} (sid, type, data) VALUES (%d, '%s', '%s')", $sid, $type, $accum);
db_query("INSERT INTO {search_dataset} (sid, type, data, reindex) VALUES (%d, '%s', '%s', %d)", $sid, $type, $accum, 0);
// Insert results into search index
foreach ($results[0] as $word => $score) {
@ -571,12 +576,82 @@ function search_index($sid, $type, $text) {
}
unset($results[0]);
// Now insert links to nodes
// Get all previous links from this item.
$result = db_query("SELECT nid, caption FROM {search_node_links} WHERE sid = %d AND type = '%s'", $sid, $type);
$links = array();
while ($link = db_fetch_object($result)) {
$links[$link->nid] = $link->caption;
}
// Now store links to nodes.
foreach ($results as $nid => $words) {
foreach ($words as $word => $score) {
db_query("INSERT INTO {search_index} (word, sid, type, fromsid, fromtype, score) VALUES ('%s', %d, '%s', %d, '%s', %f)", $word, $nid, 'node', $sid, $type, $score);
search_dirty($word);
$caption = implode(' ', $words);
if (isset($links[$nid])) {
if ($links[$nid] != $caption) {
// Update the existing link and mark the node for reindexing.
db_query("UPDATE {search_node_links} SET caption = '%s' WHERE sid = %d AND type = '%s' AND nid = %d", $caption, $sid, $type, $nid);
search_touch_node($nid);
}
// Unset the link to mark it as processed.
unset($links[$nid]);
}
else {
// Insert the existing link and mark the node for reindexing.
db_query("INSERT INTO {search_node_links} (caption, sid, type, nid) VALUES ('%s', %d, '%s', %d)", $caption, $sid, $type, $nid);
search_touch_node($nid);
}
}
// Any left-over links in $links no longer exist. Delete them and mark the nodes for reindexing.
foreach ($links as $nid) {
db_query("DELETE FROM {search_node_links} WHERE sid = %d AND type = '%s' AND nid = %d", $sid, $type, $nid);
search_touch_node($nid);
}
}
/**
* Change a node's changed timestamp to 'now' to force reindexing.
*
* @param $nid
* The nid of the node that needs reindexing.
*/
function search_touch_node($nid) {
db_query("UPDATE {search_dataset} SET reindex = %d WHERE sid = %d AND type = 'node'", time(), $nid);
}
/**
* Implementation of hook_nodeapi().
*/
function search_nodeapi(&$node, $op, $teaser = NULL, $page = NULL) {
switch ($op) {
// Transplant links to a node into the target node.
case 'update index':
$result = db_query("SELECT caption FROM {search_node_links} WHERE nid = %d", $node->nid);
$output = array();
while ($link = db_fetch_object($result)) {
$output[] = $link->caption;
}
return '<a>('. implode(', ', $output) .')</a>';
// Reindex the node when it is updated. The node is automatically indexed
// when it is added, simply by being added to the node table.
case 'update':
search_touch_node($node->nid);
break;
}
}
/**
* Implementation of hook_comment().
*/
function search_comment($a1, $op) {
switch ($op) {
// Reindex the node when comments are added or changed
case 'insert':
case 'update':
case 'delete':
case 'publish':
case 'unpublish':
search_touch_node(is_array($a1) ? $a1['nid'] : $a1->nid);
break;
}
}
@ -606,7 +681,22 @@ function search_query_insert($keys, $option, $value = '') {
/**
* Parse a search query into SQL conditions.
*
* We build a query that matches the dataset bodies.
* We build two queries that matches the dataset bodies. @See do_search for
* more about these.
*
* @param $text
* The search keys.
* @return
* A list of six elements.
* * A series of statements AND'd together which will be used to provide all
* possible matches.
* * Arguments for this query part.
* * A series of exact word matches OR'd together.
* * Arguments for this query part.
* * A bool indicating whether this is a simple query or not. Negative
* terms, presence of both AND / OR make this FALSE.
* * A bool indicating the presence of a lowercase or. Maybe the user
* wanted to use OR.
*/
function search_parse_query($text) {
$keys = array('positive' => array(), 'negative' => array());
@ -620,12 +710,15 @@ function search_parse_query($text) {
// Classify tokens
$or = FALSE;
$or_warning = FALSE;
$simple = TRUE;
foreach ($matches as $match) {
$phrase = FALSE;
// Strip off phrase quotes
if ($match[2]{0} == '"') {
$match[2] = substr($match[2], 1, -1);
$phrase = TRUE;
$simple = FALSE;
}
// Simplify keyword according to indexing rules and external preprocessors
$words = search_simplify($match[2]);
@ -649,6 +742,9 @@ function search_parse_query($text) {
}
// Plain keyword
else {
if ($match[2] == 'or') {
$or_warning = TRUE;
}
if ($or) {
// Add to last element (which is an array)
$keys['positive'][count($keys['positive']) - 1] = array_merge($keys['positive'][count($keys['positive']) - 1], $words);
@ -666,10 +762,13 @@ function search_parse_query($text) {
$arguments = array();
$arguments2 = array();
$matches = 0;
$simple_and = FALSE;
$simple_or = FALSE;
// Positive matches
foreach ($keys['positive'] as $key) {
// Group of ORed terms
if (is_array($key) && count($key)) {
$simple_or = TRUE;
$queryor = array();
$any = FALSE;
foreach ($key as $or) {
@ -688,6 +787,7 @@ function search_parse_query($text) {
}
// Single ANDed term
else {
$simple_and = TRUE;
list($q, $count) = _search_parse_query($key, $arguments2);
if ($q) {
$query[] = $q;
@ -697,12 +797,16 @@ function search_parse_query($text) {
}
}
}
if ($simple_and && $simple_or) {
$simple = FALSE;
}
// Negative matches
foreach ($keys['negative'] as $key) {
list($q) = _search_parse_query($key, $arguments2, TRUE);
if ($q) {
$query[] = $q;
$arguments[] = $key;
$simple = FALSE;
}
}
$query = implode(' AND ', $query);
@ -710,7 +814,7 @@ function search_parse_query($text) {
// Build word-index conditions for the first pass
$query2 = substr(str_repeat("i.word = '%s' OR ", count($arguments2)), 0, -4);
return array($query, $arguments, $query2, $arguments2, $matches);
return array($query, $arguments, $query2, $arguments2, $matches, $simple, $or_warning);
}
/**
@ -742,28 +846,15 @@ function _search_parse_query(&$word, &$scores, $not = FALSE) {
* This function is normally only called by each module that support the
* indexed search (and thus, implements hook_update_index()).
*
* Two queries are performed which can be extended by the caller.
* Results are retrieved in two logical passes. However, the two passes are
* joined together into a single query. And in the case of most simple
* queries the second pass is not even used.
*
* The first query selects a set of possible matches based on the search index
* and any extra given restrictions. This is the classic "OR" search.
* The first pass selects a set of all possible matches, which has the benefit
* of also providing the exact result set for simple "AND" or "OR" searches.
*
* SELECT i.type, i.sid, SUM(i.score*t.count) AS relevance
* FROM {search_index} i
* INNER JOIN {search_total} t ON i.word = t.word
* $join1
* WHERE $where1 AND (...)
* GROUP BY i.type, i.sid
*
* The second query further refines this set by verifying advanced text
* conditions (such as AND, negative or phrase matches), and orders the results
* on a the column or expression 'score':
*
* SELECT i.type, i.sid, $select2
* FROM temp_search_sids i
* INNER JOIN {search_dataset} d ON i.sid = d.sid AND i.type = d.type
* $join2
* WHERE (...)
* ORDER BY score DESC
* The second portion of the query further refines this set by verifying
* advanced text conditions (such negative or phrase matches)
*
* @param $keywords
* A search string as entered by the user.
@ -782,7 +873,7 @@ function _search_parse_query(&$word, &$scores, $not = FALSE) {
* @param $arguments1
* (optional) Extra SQL arguments belonging to the first query.
*
* @param $select2
* @param $columns2
* (optional) Inserted into the SELECT pat of the second query. Must contain
* a column selected as 'score'.
* defaults to 'i.relevance AS score'
@ -803,40 +894,45 @@ function _search_parse_query(&$word, &$scores, $not = FALSE) {
*
* @ingroup search
*/
function do_search($keywords, $type, $join1 = '', $where1 = '1', $arguments1 = array(), $select2 = 'i.relevance AS score', $join2 = '', $arguments2 = array(), $sort_parameters = 'ORDER BY score DESC') {
function do_search($keywords, $type, $join1 = '', $where1 = '1', $arguments1 = array(), $columns2 = 'i.relevance AS score', $join2 = '', $arguments2 = array(), $sort_parameters = 'ORDER BY score DESC') {
$query = search_parse_query($keywords);
if ($query[2] == '') {
form_set_error('keys', t('You must include at least one positive keyword with @count characters or more.', array('@count' => variable_get('minimum_word_size', 3))));
}
if ($query[6]) {
form_set_error('keys', t('Try uppercase "OR" to search for either of two terms.'));
}
if ($query === NULL || $query[0] == '' || $query[2] == '') {
return array();
}
// First pass: select all possible matching sids, doing a simple index-based OR matching on the keywords.
// 'matches' is used to reject those items that cannot possibly match the query.
$conditions = $where1 .' AND ('. $query[2] .") AND i.type = '%s'";
$arguments = array_merge($arguments1, $query[3], array($type, $query[4]));
$result = db_query_temporary("SELECT i.type, i.sid, SUM(i.score * t.count) AS relevance, COUNT(*) AS matches FROM {search_index} i INNER JOIN {search_total} t ON i.word = t.word $join1 WHERE $conditions GROUP BY i.type, i.sid HAVING COUNT(*) >= %d", $arguments, 'temp_search_sids');
// Build query for keyword normalization.
$conditions = "$where1 AND ($query[2]) AND i.type = '%s'";
$arguments1 = array_merge($arguments1, $query[3], array($type));
$join = "INNER JOIN {search_total} t ON i.word = t.word $join1";
if (!$query[5]) {
$conditions .= " AND ($query[0])";
$arguments1 = array_merge($arguments1, $query[1]);
$join .= " INNER JOIN {search_dataset} d ON i.sid = d.sid AND i.type = d.type";
}
// Calculate maximum relevance, to normalize it
$normalize = db_result(db_query('SELECT MAX(relevance) FROM temp_search_sids'));
// Calculate maximum keyword relevance, to normalize it.
$select = "SELECT MAX(i.score * t.count) FROM {search_index} i $join WHERE $conditions GROUP BY i.type, i.sid HAVING COUNT(*) >= %d";
$arguments = array_merge($arguments1, array($query[4]));
$normalize = db_result(db_query($select, $arguments));
if (!$normalize) {
return array();
}
$select2 = str_replace('i.relevance', '('. (1.0 / $normalize) .' * i.relevance)', $select2);
$columns2 = str_replace('i.relevance', '('. (1.0 / $normalize) .' * SUM(i.score * t.count))', $columns2);
// Second pass: only keep items that match the complicated keywords conditions (phrase search, negative keywords, ...)
$conditions = '('. $query[0] .')';
$arguments = array_merge($arguments2, $query[1]);
$result = db_query_temporary("SELECT i.type, i.sid, $select2 FROM temp_search_sids i INNER JOIN {search_dataset} d ON i.sid = d.sid AND i.type = d.type $join2 WHERE $conditions $sort_parameters", $arguments, 'temp_search_results');
if (($count = db_result(db_query('SELECT COUNT(*) FROM temp_search_results'))) == 0) {
return array();
}
$count_query = "SELECT $count";
// Build query to retrieve results.
$select = "SELECT i.type, i.sid, $columns2 FROM {search_index} i $join $join2 WHERE $conditions GROUP BY i.type, i.sid HAVING COUNT(*) >= %d";
$count_select = "SELECT COUNT(*) FROM ($select) n1";
$arguments = array_merge($arguments2, $arguments1, array($query[4]));
// Do actual search query
$result = pager_query("SELECT * FROM temp_search_results", 10, 0, $count_query);
$result = pager_query("$select $sort_parameters", 10, 0, $count_select, $arguments);
$results = array();
while ($item = db_fetch_object($result)) {
$results[] = $item;

58
modules/system/system.install
View File

@ -4466,6 +4466,64 @@ function system_update_6035() {
return $ret;
}
/**
* Change the search index and for reindexing.
*/
function system_update_6036() {
$ret = array();
if (db_table_exists('search_index')) {
if ($GLOBALS['db_type'] == 'mysql') {
// Create the search_dataset.reindex column.
db_add_field($ret, 'search_dataset', 'reindex', array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0));
// Drop the search_index.from fields which are no longer used.
db_drop_index($ret, 'search_index', 'from_sid_type');
db_drop_field($ret, 'search_index', 'fromsid');
db_drop_field($ret, 'search_index', 'fromtype');
// Drop the search_dataset.sid_type index, so that it can be made unique.
db_drop_index($ret, 'search_dataset', 'sid_type');
// Create the search_node_links Table.
$search_node_links_schema = array(
'fields' => array(
'sid' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
'type' => array('type' => 'varchar', 'length' => 16, 'not null' => TRUE, 'default' => ''),
'nid' => array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0),
'caption' => array('type' => 'text', 'size' => 'big', 'not null' => FALSE),
),
'primary key' => array('sid', 'type', 'nid'),
'indexes' => array('nid' => array('nid')),
);
db_create_table($ret, 'search_node_links', $search_node_links_schema);
// with the change to search_dataset.reindex, the search queue is handled differently,
// and this is no longer needed
variable_del('node_cron_last');
// Everything needs to be reindexed.
$ret[] = update_sql("UPDATE {search_dataset} SET reindex = 1");
// Add a unique index for the search_index.
// Since it's possible that some existing sites have duplicates,
// create the index using the IGNORE keyword, which ignores duplicate errors.
// However, pgsql doesn't support it
$ret[] = update_sql("ALTER IGNORE TABLE {search_index} ADD UNIQUE KEY sid_word_type (sid, word, type)");
$ret[] = update_sql("ALTER IGNORE TABLE {search_dataset} ADD UNIQUE KEY sid_type (sid, type)");
}
else {
// Drop the existing tables
db_query('DROP TABLE {search_dataset}');
db_query('DROP TABLE {search_index}');
db_query('DROP TABLE {search_total}');
// Create the new tables and do a full re-index
search_install();
}
}
return $ret;
}
/**
* @} End of "defgroup updates-5.x-to-6.x"
* The next series of updates should start at 7000.