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<?php |
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namespace Yajra\Oci8\Schema; |
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use Illuminate\Database\Connection; |
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use Illuminate\Database\Schema\Blueprint; |
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class OracleAutoIncrementHelper |
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{ |
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/** |
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* @var \Illuminate\Database\Connection |
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*/ |
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protected $connection; |
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/** |
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* @var \Yajra\Oci8\Schema\Trigger |
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*/ |
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protected $trigger; |
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/** |
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* @var \Yajra\Oci8\Schema\Sequence |
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*/ |
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protected $sequence; |
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/** |
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* @param \Illuminate\Database\Connection $connection |
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*/ |
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public function __construct(Connection $connection) |
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{ |
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$this->connection = $connection; |
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$this->sequence = new Sequence($connection); |
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$this->trigger = new Trigger($connection); |
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} |
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/** |
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* create sequence and trigger for autoIncrement support |
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* |
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* @param Blueprint $blueprint |
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* @param string $table |
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* @return null |
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*/ |
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public function createAutoIncrementObjects(Blueprint $blueprint, $table) |
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{ |
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$column = $this->getQualifiedAutoIncrementColumn($blueprint); |
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// return if no qualified AI column |
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if (is_null($column)) { |
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return; |
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} |
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$col = $column->name; |
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$start = isset($column->start) ? $column->start : 1; |
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// get table prefix |
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$prefix = $this->connection->getTablePrefix(); |
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// create sequence for auto increment |
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$sequenceName = $this->createObjectName($prefix, $table, $col, 'seq'); |
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$this->sequence->create($sequenceName, $start, $column->nocache); |
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// create trigger for auto increment work around |
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$triggerName = $this->createObjectName($prefix, $table, $col, 'trg'); |
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$this->trigger->autoIncrement($prefix . $table, $col, $triggerName, $sequenceName); |
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} |
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/** |
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* Get qualified autoincrement column. |
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* |
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* @param Blueprint $blueprint |
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* @return \Illuminate\Support\Fluent|null |
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*/ |
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public function getQualifiedAutoIncrementColumn(Blueprint $blueprint) |
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{ |
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$columns = $blueprint->getColumns(); |
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// search for primary key / autoIncrement column |
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foreach ($columns as $column) { |
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// if column is autoIncrement set the primary col name |
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if ($column->autoIncrement) { |
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return $column; |
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} |
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} |
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return null; |
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} |
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/** |
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* Create an object name that limits to 30 chars. |
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* |
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* @param string $prefix |
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* @param string $table |
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* @param string $col |
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* @param string $type |
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* @return string |
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*/ |
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private function createObjectName($prefix, $table, $col, $type) |
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{ |
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// max object name length is 30 chars |
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return substr($prefix . $table . '_' . $col . '_' . $type, 0, 30); |
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} |
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/** |
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* Drop sequence and triggers if exists, autoincrement objects. |
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* |
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* @param string $table |
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* @return null |
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*/ |
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public function dropAutoIncrementObjects($table) |
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{ |
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// drop sequence and trigger object |
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$prefix = $this->connection->getTablePrefix(); |
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// get the actual primary column name from table |
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$col = $this->getPrimaryKey($prefix . $table); |
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// if primary key col is set, drop auto increment objects |
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if (isset($col) && ! empty($col)) { |
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// drop sequence for auto increment |
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$sequenceName = $this->createObjectName($prefix, $table, $col, 'seq'); |
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$this->sequence->drop($sequenceName); |
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// drop trigger for auto increment work around |
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$triggerName = $this->createObjectName($prefix, $table, $col, 'trg'); |
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$this->trigger->drop($triggerName); |
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} |
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} |
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/** |
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* Get table's primary key. |
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* |
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* @param string $table |
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* @return string |
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*/ |
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public function getPrimaryKey($table) |
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{ |
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if (! $table) { |
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return ''; |
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} |
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$sql = "SELECT cols.column_name |
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FROM all_constraints cons, all_cons_columns cols |
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WHERE upper(cols.table_name) = upper('{$table}') |
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AND cons.constraint_type = 'P' |
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AND cons.constraint_name = cols.constraint_name |
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AND cons.owner = cols.owner |
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AND cols.position = 1 |
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AND cons.owner = (select user from dual) |
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ORDER BY cols.table_name, cols.position"; |
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$data = $this->connection->selectOne($sql); |
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if (count($data)) { |
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return $data->column_name; |
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} |
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return ''; |
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} |
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/** |
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* Get sequence instance. |
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* |
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* @return Sequence |
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*/ |
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public function getSequence() |
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{ |
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return $this->sequence; |
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} |
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/** |
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* Set sequence instance. |
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* |
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* @param Sequence $sequence |
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*/ |
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public function setSequence($sequence) |
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{ |
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$this->sequence = $sequence; |
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} |
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/** |
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* Get trigger instance. |
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* |
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* @return Trigger |
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*/ |
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public function getTrigger() |
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{ |
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return $this->trigger; |
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} |
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/** |
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* Set the trigger instance. |
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* |
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* @param Trigger $trigger |
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*/ |
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public function setTrigger($trigger) |
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{ |
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$this->trigger = $trigger; |
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} |
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} |
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