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aqueduct/arc/store/ARC2_StoreTableManager.php
stuckman a6471aa0d3 Aqueduct 1.2 release for repo upload
2011-06-13 19:42:11 -04:00

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8.5 KiB
PHP
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<?php
/**
* ARC2 RDF Store Table Manager
*
* @license http://arc.semsol.org/license
* @author Benjamin Nowack
* @version 2009-09-07 Tweak: store_engine_type is a config option
*
*/
ARC2::inc('Store');
class ARC2_StoreTableManager extends ARC2_Store {
function __construct($a = '', &$caller) {
parent::__construct($a, $caller);
}
function ARC2_StoreTableManager($a = '', &$caller) {
$this->__construct($a, $caller);
}
function __init() {/* db_con */
parent::__init();
$this->engine_type = $this->v('store_engine_type', 'MyISAM', $this->a);
}
/* */
function getTableOptionsCode() {
$v = $this->getDBVersion();
$r = "";
$r .= (($v < '04-01-00') && ($v >= '04-00-18')) ? 'ENGINE' : (($v >= '04-01-02') ? 'ENGINE' : 'TYPE');
$r .= "=" . $this->engine_type;
$r .= ($v >= '04-00-00') ? " CHARACTER SET utf8" : "";
$r .= ($v >= '04-01-00') ? " COLLATE utf8_unicode_ci" : "";
$r .= " DELAY_KEY_WRITE = 1";
return $r;
}
/* */
function createTables() {
$con = $this->getDBCon();
if(!$this->createTripleTable()) {
return $this->addError('Could not create "triple" table (' . mysql_error($con) . ').');
}
if(!$this->createG2TTable()) {
return $this->addError('Could not create "g2t" table (' . mysql_error($con) . ').');
}
if(!$this->createID2ValTable()) {
return $this->addError('Could not create "id2val" table (' . mysql_error($con) . ').');
}
if(!$this->createS2ValTable()) {
return $this->addError('Could not create "s2val" table (' . mysql_error($con) . ').');
}
if(!$this->createO2ValTable()) {
return $this->addError('Could not create "o2val" table (' . mysql_error($con) . ').');
}
if(!$this->createSettingTable()) {
return $this->addError('Could not create "setting" table (' . mysql_error($con) . ').');
}
return 1;
}
/* */
function createTripleTable($suffix = 'triple') {
/* keep in sync with merge def in StoreQueryHandler ! */
$indexes = $this->v('store_indexes', array('sp (s,p)', 'os (o,s)', 'po (p,o)'), $this->a);
$index_code = $indexes ? 'KEY ' . join(', KEY ', $indexes) . ', ' : '';
$sql = "
CREATE TABLE IF NOT EXISTS " . $this->getTablePrefix() . $suffix . " (
t mediumint UNSIGNED NOT NULL,
s mediumint UNSIGNED NOT NULL,
p mediumint UNSIGNED NOT NULL,
o mediumint UNSIGNED NOT NULL,
o_lang_dt mediumint UNSIGNED NOT NULL,
o_comp char(35) NOT NULL, /* normalized value for ORDER BY operations */
s_type tinyint(1) NOT NULL default 0, /* uri/bnode => 0/1 */
o_type tinyint(1) NOT NULL default 0, /* uri/bnode/literal => 0/1/2 */
misc tinyint(1) NOT NULL default 0, /* temporary flags */
UNIQUE KEY (t), " . $index_code . " KEY (misc)
) ". $this->getTableOptionsCode() . "
";
return mysql_query($sql, $this->getDBCon());
}
function extendTripleTableColumns($suffix = 'triple') {
$sql = "
ALTER TABLE " . $this->getTablePrefix() . $suffix . "
MODIFY t int(10) UNSIGNED NOT NULL,
MODIFY s int(10) UNSIGNED NOT NULL,
MODIFY p int(10) UNSIGNED NOT NULL,
MODIFY o int(10) UNSIGNED NOT NULL,
MODIFY o_lang_dt int(10) UNSIGNED NOT NULL
";
return mysql_query($sql, $this->getDBCon());
}
/* */
function createG2TTable() {
$sql = "
CREATE TABLE IF NOT EXISTS " . $this->getTablePrefix() . "g2t (
g mediumint UNSIGNED NOT NULL,
t mediumint UNSIGNED NOT NULL,
UNIQUE KEY gt (g,t), KEY tg (t,g)
) ". $this->getTableOptionsCode() . "
";
return mysql_query($sql, $this->getDBCon());
}
function extendG2tTableColumns($suffix = 'g2t') {
$sql = "
ALTER TABLE " . $this->getTablePrefix() . $suffix . "
MODIFY g int(10) UNSIGNED NOT NULL,
MODIFY t int(10) UNSIGNED NOT NULL
";
return mysql_query($sql, $this->getDBCon());
}
/* */
function createID2ValTable() {
$sql = "
CREATE TABLE IF NOT EXISTS " . $this->getTablePrefix() . "id2val (
id mediumint UNSIGNED NOT NULL,
misc tinyint(1) NOT NULL default 0,
val text NOT NULL,
val_type tinyint(1) NOT NULL default 0, /* uri/bnode/literal => 0/1/2 */
UNIQUE KEY (id,val_type), KEY v (val(64))
) ". $this->getTableOptionsCode() . "
";
return mysql_query($sql, $this->getDBCon());
}
function extendId2valTableColumns($suffix = 'id2val') {
$sql = "
ALTER TABLE " . $this->getTablePrefix() . $suffix . "
MODIFY id int(10) UNSIGNED NOT NULL
";
return mysql_query($sql, $this->getDBCon());
}
/* */
function createS2ValTable() {
$sql = "
CREATE TABLE IF NOT EXISTS " . $this->getTablePrefix() . "s2val (
id mediumint UNSIGNED NOT NULL,
misc tinyint(1) NOT NULL default 0,
val text NOT NULL,
UNIQUE KEY (id), KEY v (val(64))
) ". $this->getTableOptionsCode() . "
";
return mysql_query($sql, $this->getDBCon());
}
function extendS2valTableColumns($suffix = 's2val') {
$sql = "
ALTER TABLE " . $this->getTablePrefix() . $suffix . "
MODIFY id int(10) UNSIGNED NOT NULL
";
return mysql_query($sql, $this->getDBCon());
}
/* */
function createO2ValTable() {
$sql = "
CREATE TABLE IF NOT EXISTS " . $this->getTablePrefix() . "o2val (
id mediumint UNSIGNED NOT NULL,
misc tinyint(1) NOT NULL default 0,
val text NOT NULL,
UNIQUE KEY (id), KEY v (val(64))
) ". $this->getTableOptionsCode() . "
";
return mysql_query($sql, $this->getDBCon());
}
function extendO2valTableColumns($suffix = 'o2val') {
$sql = "
ALTER TABLE " . $this->getTablePrefix() . $suffix . "
MODIFY id int(10) UNSIGNED NOT NULL
";
return mysql_query($sql, $this->getDBCon());
}
/* */
function createSettingTable() {
$sql = "
CREATE TABLE IF NOT EXISTS " . $this->getTablePrefix() . "setting (
k char(32) NOT NULL,
val text NOT NULL,
UNIQUE KEY (k)
) ". $this->getTableOptionsCode() . "
";
return mysql_query($sql, $this->getDBCon());
}
/* */
function extendColumns() {
$con = $this->getDBCon();
$tbl_prefix = $this->getTablePrefix();
$tbls = $this->getTables();
foreach ($tbls as $suffix) {
if (preg_match('/^(triple|g2t|id2val|s2val|o2val)/', $suffix, $m)) {
$mthd = 'extend' . ucfirst($m[1]) . 'TableColumns';
$this->$mthd($suffix);
}
}
}
/* */
function splitTables() {
$old_ps = $this->getSetting('split_predicates', array());
$new_ps = $this->retrieveSplitPredicates();
$add_ps = array_diff($new_ps, $old_ps);
$del_ps = array_diff($old_ps, $new_ps);
$final_ps = array();
foreach ($del_ps as $p) {
if (!$this->unsplitPredicate($p)) $final_ps[] = $p;
}
foreach ($add_ps as $p) {
if ($this->splitPredicate($p)) $final_ps[] = $p;
}
$this->setSetting('split_predicates', $new_ps);
}
function unsplitPredicate($p) {
$suffix = 'triple_' . abs(crc32($p));
$old_tbl = $this->getTablePrefix() . $suffix;
$new_tbl = $this->getTablePrefix() . 'triple';
$p_id = $this->getTermID($p, 'p');
$con = $this->getDBCon();
$sql = '
INSERT IGNORE INTO ' . $new_tbl .'
SELECT * FROM ' . $old_tbl . ' WHERE ' . $old_tbl . '.p = ' . $p_id . '
';
if ($rs = mysql_query($sql, $con)) {
mysql_query('DROP TABLE ' . $old_tbl, $con);
return 1;
}
else {
return 0;
}
}
function splitPredicate($p) {
$suffix = 'triple_' . abs(crc32($p));
$this->createTripleTable($suffix);
$old_tbl = $this->getTablePrefix() . 'triple';
$new_tbl = $this->getTablePrefix() . $suffix;
$p_id = $this->getTermID($p, 'p');
$con = $this->getDBCon();
$sql = '
INSERT IGNORE INTO ' . $new_tbl .'
SELECT * FROM ' . $old_tbl . ' WHERE ' . $old_tbl . '.p = ' . $p_id . '
';
if ($rs = mysql_query($sql, $con)) {
mysql_query('DELETE FROM ' . $old_tbl . ' WHERE ' . $old_tbl . '.p = ' . $p_id, $con);
return 1;
}
else {
mysql_query('DROP TABLE ' . $new_tbl, $con);
return 0;
}
}
function retrieveSplitPredicates() {
$r = $this->split_predicates;
$limit = $this->max_split_tables - count($r);
$q = 'SELECT ?p COUNT(?p) AS ?pc WHERE { ?s ?p ?o } GROUP BY ?p ORDER BY DESC(?pc) LIMIT ' . $limit;
$rows = $this->query($q, 'rows');
foreach ($rows as $row) {
$r[] = $row['p'];
}
return $r;
}
/* */
}
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