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<?php |
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/** |
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* Spiral Framework. |
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* |
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* @license MIT |
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* @author Anton Titov (Wolfy-J) |
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*/ |
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namespace Spiral\Database\Drivers\MySQL\Schemas; |
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use Spiral\Database\Entities\Driver; |
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use Spiral\Database\Entities\Schemas\AbstractCommander; |
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use Spiral\Database\Entities\Schemas\AbstractTable; |
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use Spiral\Database\Exceptions\SchemaException; |
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/** |
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* MySQL table schema. |
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*/ |
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class TableSchema extends AbstractTable |
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{ |
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/** |
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* List of most common MySQL table engines. |
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*/ |
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const ENGINE_INNODB = 'InnoDB'; |
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const ENGINE_MYISAM = 'MyISAM'; |
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const ENGINE_MEMORY = 'Memory'; |
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/** |
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* MySQL table engine. |
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* |
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* @var string |
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*/ |
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private $engine = self::ENGINE_INNODB; |
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/** |
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* @param Driver $driver Parent driver. |
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* @param AbstractCommander $commander |
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* @param string $name Table name, must include table prefix. |
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* @param string $prefix Database specific table prefix. |
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*/ |
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public function __construct(Driver $driver, AbstractCommander $commander, $name, $prefix) |
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{ |
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parent::__construct($driver, $commander, $name, $prefix); |
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//Let's load table type, just for fun |
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if ($this->exists()) { |
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$query = $driver->query('SHOW TABLE STATUS WHERE Name = ?', [$name]); |
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$this->engine = $query->fetch()['Engine']; |
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} |
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} |
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/** |
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* Change table engine. Such operation will be applied only at moment of table creation. |
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* |
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* @param string $engine |
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* @return $this |
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*/ |
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public function setEngine($engine) |
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{ |
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if ($this->exists()) { |
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throw new SchemaException("Table engine can be set only at moment of creation."); |
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} |
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$this->engine = $engine; |
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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 getEngine() |
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{ |
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return $this->engine; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadColumns() |
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{ |
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$query = "SHOW FULL COLUMNS FROM {$this->getName(true)}"; |
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foreach ($this->driver->query($query)->bind(0, $name) as $column) { |
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$this->registerColumn($this->columnSchema($name, $column)); |
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} |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadIndexes() |
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{ |
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$query = "SHOW INDEXES FROM {$this->getName(true)}"; |
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$indexes = []; |
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$primaryKeys = []; |
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foreach ($this->driver->query($query) as $index) { |
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if ($index['Key_name'] == 'PRIMARY') { |
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$primaryKeys[] = $index['Column_name']; |
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continue; |
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} |
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$indexes[$index['Key_name']][] = $index; |
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} |
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$this->setPrimaryKeys($primaryKeys); |
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foreach ($indexes as $name => $schema) { |
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$this->registerIndex($this->indexSchema($name, $schema)); |
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} |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadReferences() |
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{ |
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$query = "SELECT * FROM information_schema.referential_constraints " |
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. "WHERE constraint_schema = ? AND table_name = ?"; |
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$references = $this->driver->query($query, [$this->driver->getSource(), $this->getName()]); |
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foreach ($references->all() as $reference) { |
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$query = "SELECT * FROM information_schema.key_column_usage " |
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. "WHERE constraint_name = ? AND table_schema = ? AND table_name = ?"; |
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$column = $this->driver->query( |
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$query, |
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[$reference['CONSTRAINT_NAME'], $this->driver->getSource(), $this->getName()] |
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)->fetch(); |
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$this->registerReference( |
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$this->referenceSchema($reference['CONSTRAINT_NAME'], $reference + $column) |
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); |
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} |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function columnSchema($name, $schema = null) |
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{ |
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return new ColumnSchema($this, $name, $schema); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function indexSchema($name, $schema = null) |
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{ |
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return new IndexSchema($this, $name, $schema); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function referenceSchema($name, $schema = null) |
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{ |
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return new ReferenceSchema($this, $name, $schema); |
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} |
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} |
spiral /
components
