/**
* Function to get the sql query for index creation or edit
*
* @param Index $index current index
* @param bool &$error whether error occurred or not
*
* @return string
*/
public function getSqlQueryForIndexCreateOrEdit($index, &$error)
{
// $sql_query is the one displayed in the query box
$sql_query = sprintf('ALTER TABLE %s.%s', Util::backquote($this->_db_name), Util::backquote($this->_name));
// Drops the old index
if (!empty($_REQUEST['old_index'])) {
if ($_REQUEST['old_index'] == 'PRIMARY') {
$sql_query .= ' DROP PRIMARY KEY,';
} else {
$sql_query .= sprintf(' DROP INDEX %s,', Util::backquote($_REQUEST['old_index']));
}
}
// end if
// Builds the new one
switch ($index->getChoice()) {
case 'PRIMARY':
if ($index->getName() == '') {
$index->setName('PRIMARY');
} elseif ($index->getName() != 'PRIMARY') {
$error = Message::error(__('The name of the primary key must be "PRIMARY"!'));
}
$sql_query .= ' ADD PRIMARY KEY';
break;
case 'FULLTEXT':
case 'UNIQUE':
case 'INDEX':
case 'SPATIAL':
if ($index->getName() == 'PRIMARY') {
$error = Message::error(__('Can\'t rename index to PRIMARY!'));
}
$sql_query .= sprintf(' ADD %s ', $index->getChoice());
if ($index->getName()) {
$sql_query .= Util::backquote($index->getName());
}
break;
}
// end switch
$index_fields = array();
foreach ($index->getColumns() as $key => $column) {
$index_fields[$key] = Util::backquote($column->getName());
if ($column->getSubPart()) {
$index_fields[$key] .= '(' . $column->getSubPart() . ')';
}
}
// end while
if (empty($index_fields)) {
$error = Message::error(__('No index parts defined!'));
} else {
$sql_query .= ' (' . implode(', ', $index_fields) . ')';
}
$keyBlockSizes = $index->getKeyBlockSize();
if (!empty($keyBlockSizes)) {
$sql_query .= sprintf(' KEY_BLOCK_SIZE = ', Util::sqlAddSlashes($keyBlockSizes));
}
// specifying index type is allowed only for primary, unique and index only
$type = $index->getType();
if ($index->getChoice() != 'SPATIAL' && $index->getChoice() != 'FULLTEXT' && in_array($type, Index::getIndexTypes())) {
$sql_query .= ' USING ' . $type;
}
$parser = $index->getParser();
if ($index->getChoice() == 'FULLTEXT' && !empty($parser)) {
$sql_query .= ' WITH PARSER ' . Util::sqlAddSlashes($parser);
}
$comment = $index->getComment();
if (!empty($comment)) {
$sql_query .= sprintf(" COMMENT '%s'", Util::sqlAddSlashes($comment));
}
$sql_query .= ';';
return $sql_query;
}
/**
* Creates(if not already created) and returns the corresponding Index object
*
* @param string $schema database name
* @param string $table table name
* @param string $index_name index name
*
* @return Index corresponding Index object
*/
public static function singleton($schema, $table, $index_name = '')
{
Index::_loadIndexes($table, $schema);
if (!isset(Index::$_registry[$schema][$table][$index_name])) {
$index = new Index();
if (strlen($index_name) > 0) {
$index->setName($index_name);
Index::$_registry[$schema][$table][$index->getName()] = $index;
}
return $index;
} else {
return Index::$_registry[$schema][$table][$index_name];
}
}
