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<?php /* vim: set expandtab sw=4 ts=4 sts=4: */ /** * holds the database index columns class * * @package PhpMyAdmin */ declare(strict_types=1); namespace PhpMyAdmin; /** * Index column wrapper * * @package PhpMyAdmin */ class IndexColumn { /** * @var string The column name */ private $_name = ''; /** * @var integer The column sequence number in the index, starting with 1. */ private $_seq_in_index = 1; /** * @var string How the column is sorted in the index. “A” (Ascending) or * NULL (Not sorted) */ private $_collation = null; /** * The number of indexed characters if the column is only partly indexed, * NULL if the entire column is indexed. * * @var integer */ private $_sub_part = null; /** * Contains YES if the column may contain NULL. * If not, the column contains NO. * * @var string */ private $_null = ''; /** * An estimate of the number of unique values in the index. This is updated * by running ANALYZE TABLE or myisamchk -a. Cardinality is counted based on * statistics stored as integers, so the value is not necessarily exact even * for small tables. The higher the cardinality, the greater the chance that * MySQL uses the index when doing joins. * * @var integer */ private $_cardinality = null; /** * Constructor * * @param array $params an array containing the parameters of the index column */ public function __construct(array $params = []) { $this->set($params); } /** * Sets parameters of the index column * * @param array $params an array containing the parameters of the index column * * @return void */ public function set(array $params) { if (isset($params['Column_name'])) { $this->_name = $params['Column_name']; } if (isset($params['Seq_in_index'])) { $this->_seq_in_index = $params['Seq_in_index']; } if (isset($params['Collation'])) { $this->_collation = $params['Collation']; } if (isset($params['Cardinality'])) { $this->_cardinality = $params['Cardinality']; } if (isset($params['Sub_part'])) { $this->_sub_part = $params['Sub_part']; } if (isset($params['Null'])) { $this->_null = $params['Null']; } } /** * Returns the column name * * @return string column name */ public function getName() { return $this->_name; } /** * Return the column collation * * @return string column collation */ public function getCollation() { return $this->_collation; } /** * Returns the cardinality of the column * * @return int cardinality of the column */ public function getCardinality() { return $this->_cardinality; } /** * Returns whether the column is nullable * * @param boolean $as_text whether to returned the string representation * * @return mixed nullability of the column. True/false or Yes/No depending * on the value of the $as_text parameter */ public function getNull($as_text = false) { if ($as_text) { if (! $this->_null || $this->_null == 'NO') { return __('No'); } return __('Yes'); } return $this->_null; } /** * Returns the sequence number of the column in the index * * @return int sequence number of the column in the index */ public function getSeqInIndex() { return $this->_seq_in_index; } /** * Returns the number of indexed characters if the column is only * partly indexed * * @return int the number of indexed characters */ public function getSubPart() { return $this->_sub_part; } /** * Gets the properties in an array for comparison purposes * * @return array an array containing the properties of the index column */ public function getCompareData() { return [ 'Column_name' => $this->_name, 'Seq_in_index' => $this->_seq_in_index, 'Collation' => $this->_collation, 'Sub_part' => $this->_sub_part, 'Null' => $this->_null, ]; } }