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<?php |
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/** |
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* Created by Gorlum 04.10.2017 8:55 |
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*/ |
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namespace DBAL; |
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/** |
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* Class DbIndexDescription |
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* @package DBAL |
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* |
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* Objects of this class contains MySql index description |
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*/ |
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class DbIndexDescription { |
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public $Key_name = ''; // Key_name - The name of the index. If the index is the primary key, the name is always PRIMARY. |
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public $Non_unique = 1; // 0 if the index cannot contain duplicates, 1 if it can. |
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public $Packed = null; // Indicates how the key is packed. NULL if it is not. |
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public $Index_type = 'BTREE'; // The index method used (BTREE, FULLTEXT, HASH, RTREE). |
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public $Comment = ''; // Information about the index not described in its own column, such as disabled if the index is disabled. |
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public $Index_comment = ''; // Any comment provided for the index with a COMMENT attribute when the index was created. |
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public $Visible; // Whether the index is visible to the optimizer. See Section 8.3.12, “Invisible Indexes”. |
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/** |
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* @var DbIndexField[] |
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*/ |
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public $fields = []; |
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protected $sorted = true; |
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/** |
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* @param array $indexField |
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* |
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* @return $this |
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*/ |
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public function addField($indexField) { |
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$this->Key_name = isset($indexField['Key_name']) ? $indexField['Key_name'] : null; |
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$this->Non_unique = isset($indexField['Non_unique']) ? $indexField['Non_unique'] : null; |
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$this->Packed = isset($indexField['Packed']) ? $indexField['Packed'] : null; |
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$this->Index_type = isset($indexField['Index_type']) ? $indexField['Index_type'] : null; |
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$this->Comment = isset($indexField['Comment']) ? $indexField['Comment'] : null; |
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$this->Index_comment = isset($indexField['Index_comment']) ? $indexField['Index_comment'] : null; |
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$this->Visible = isset($indexField['Visible']) ? $indexField['Visible'] : null; |
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if (isset($indexField['Column_name']) || isset($indexField['Expression'])) { |
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$fullName = $indexField['Column_name'] . |
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(!empty($indexField['Expression']) ? '|' . $indexField['Expression'] : ''); |
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$this->fields[$fullName] = new DbIndexField($indexField); |
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$this->sorted = false; |
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} |
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return $this; |
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} |
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/** |
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* @return string |
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*/ |
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public function signature() { |
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$this->sort(); |
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return implode(',', array_keys($this->fields)); |
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} |
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protected function sort() { |
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if (!$this->sorted) { |
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asort($this->fields, function (DbIndexField $a, DbIndexField $b) { |
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return $a->Seq_in_index - $b->Seq_in_index; |
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}); |
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} |
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} |
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} |
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supernova-ws /
SuperNova
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