/**
* Return metadata
* @return array
*/
protected function _readMetadata()
{
$metadata = unpack('Nflags/Ncolumns_count', $this->read(8));
$flags = $metadata['flags'];
if ($flags & self::ROWS_FLAG_HAS_MORE_PAGES) {
$metadata['page_state'] = parent::readBytes();
}
if (!($flags & self::ROWS_FLAG_NO_METADATA)) {
$metadata['columns'] = [];
if ($flags & self::ROWS_FLAG_GLOBAL_TABLES_SPEC) {
$keyspace = $this->read(unpack('n', $this->read(2))[1]);
$tableName = $this->read(unpack('n', $this->read(2))[1]);
for ($i = 0; $i < $metadata['columns_count']; ++$i) {
$metadata['columns'][] = ['keyspace' => $keyspace, 'tableName' => $tableName, 'name' => $this->read(unpack('n', $this->read(2))[1]), 'type' => self::readType()];
}
} else {
for ($i = 0; $i < $metadata['columns_count']; ++$i) {
$metadata['columns'][] = ['keyspace' => $this->read(unpack('n', $this->read(2))[1]), 'tableName' => $this->read(unpack('n', $this->read(2))[1]), 'name' => $this->read(unpack('n', $this->read(2))[1]), 'type' => self::readType()];
}
}
}
return $metadata;
}
