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<?php |
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/** |
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* @link https://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license https://www.yiiframework.com/license/ |
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*/ |
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namespace yii\db\sqlite; |
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use Yii; |
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use yii\base\NotSupportedException; |
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use yii\db\CheckConstraint; |
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use yii\db\ColumnSchema; |
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use yii\db\Constraint; |
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use yii\db\ConstraintFinderInterface; |
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use yii\db\ConstraintFinderTrait; |
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use yii\db\Expression; |
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use yii\db\ForeignKeyConstraint; |
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use yii\db\IndexConstraint; |
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use yii\db\SqlToken; |
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use yii\db\TableSchema; |
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use yii\db\Transaction; |
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use yii\helpers\ArrayHelper; |
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/** |
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* Schema is the class for retrieving metadata from a SQLite (2/3) database. |
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* |
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* @property-write string $transactionIsolationLevel The transaction isolation level to use for this |
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* transaction. This can be either [[Transaction::READ_UNCOMMITTED]] or [[Transaction::SERIALIZABLE]]. |
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* |
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* @author Qiang Xue <[email protected]> |
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* @since 2.0 |
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*/ |
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class Schema extends \yii\db\Schema implements ConstraintFinderInterface |
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{ |
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use ConstraintFinderTrait; |
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/** |
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* @var array mapping from physical column types (keys) to abstract column types (values) |
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*/ |
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public $typeMap = [ |
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'tinyint' => self::TYPE_TINYINT, |
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'bit' => self::TYPE_SMALLINT, |
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'boolean' => self::TYPE_BOOLEAN, |
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'bool' => self::TYPE_BOOLEAN, |
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'smallint' => self::TYPE_SMALLINT, |
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'mediumint' => self::TYPE_INTEGER, |
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'int' => self::TYPE_INTEGER, |
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'integer' => self::TYPE_INTEGER, |
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'bigint' => self::TYPE_BIGINT, |
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'float' => self::TYPE_FLOAT, |
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'double' => self::TYPE_DOUBLE, |
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'real' => self::TYPE_FLOAT, |
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'decimal' => self::TYPE_DECIMAL, |
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'numeric' => self::TYPE_DECIMAL, |
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'tinytext' => self::TYPE_TEXT, |
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'mediumtext' => self::TYPE_TEXT, |
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'longtext' => self::TYPE_TEXT, |
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'text' => self::TYPE_TEXT, |
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'varchar' => self::TYPE_STRING, |
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'string' => self::TYPE_STRING, |
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'char' => self::TYPE_CHAR, |
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'blob' => self::TYPE_BINARY, |
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'datetime' => self::TYPE_DATETIME, |
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'year' => self::TYPE_DATE, |
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'date' => self::TYPE_DATE, |
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'time' => self::TYPE_TIME, |
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'timestamp' => self::TYPE_TIMESTAMP, |
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'enum' => self::TYPE_STRING, |
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]; |
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/** |
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* {@inheritdoc} |
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*/ |
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protected $tableQuoteCharacter = '`'; |
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/** |
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* {@inheritdoc} |
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*/ |
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protected $columnQuoteCharacter = '`'; |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function findTableNames($schema = '') |
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{ |
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$sql = "SELECT DISTINCT tbl_name FROM sqlite_master WHERE tbl_name<>'sqlite_sequence' ORDER BY tbl_name"; |
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return $this->db->createCommand($sql)->queryColumn(); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadTableSchema($name) |
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{ |
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$table = new TableSchema(); |
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$table->name = $name; |
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$table->fullName = $name; |
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if ($this->findColumns($table)) { |
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$this->findConstraints($table); |
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return $table; |
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} |
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return null; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadTablePrimaryKey($tableName) |
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{ |
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return $this->loadTableConstraints($tableName, 'primaryKey'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadTableForeignKeys($tableName) |
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{ |
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$foreignKeys = $this->db->createCommand('PRAGMA FOREIGN_KEY_LIST (' . $this->quoteValue($tableName) . ')')->queryAll(); |
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$foreignKeys = $this->normalizePdoRowKeyCase($foreignKeys, true); |
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$foreignKeys = ArrayHelper::index($foreignKeys, null, 'table'); |
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ArrayHelper::multisort($foreignKeys, 'seq', SORT_ASC, SORT_NUMERIC); |
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$result = []; |
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foreach ($foreignKeys as $table => $foreignKey) { |
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$result[] = new ForeignKeyConstraint([ |
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'columnNames' => ArrayHelper::getColumn($foreignKey, 'from'), |
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'foreignTableName' => $table, |
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'foreignColumnNames' => ArrayHelper::getColumn($foreignKey, 'to'), |
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'onDelete' => isset($foreignKey[0]['on_delete']) ? $foreignKey[0]['on_delete'] : null, |
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'onUpdate' => isset($foreignKey[0]['on_update']) ? $foreignKey[0]['on_update'] : null, |
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]); |
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} |
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return $result; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadTableIndexes($tableName) |
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{ |
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return $this->loadTableConstraints($tableName, 'indexes'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadTableUniques($tableName) |
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{ |
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return $this->loadTableConstraints($tableName, 'uniques'); |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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protected function loadTableChecks($tableName) |
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{ |
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$sql = $this->db->createCommand('SELECT `sql` FROM `sqlite_master` WHERE name = :tableName', [ |
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':tableName' => $tableName, |
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])->queryScalar(); |
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/** @var $code SqlToken[]|SqlToken[][]|SqlToken[][][] */ |
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$code = (new SqlTokenizer($sql))->tokenize(); |
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$pattern = (new SqlTokenizer('any CREATE any TABLE any()'))->tokenize(); |
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if (!$code[0]->matches($pattern, 0, $firstMatchIndex, $lastMatchIndex)) { |
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return []; |
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} |
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$createTableToken = $code[0][$lastMatchIndex - 1]; |
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$result = []; |
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$offset = 0; |
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while (true) { |
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$pattern = (new SqlTokenizer('any CHECK()'))->tokenize(); |
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if (!$createTableToken->matches($pattern, $offset, $firstMatchIndex, $offset)) { |
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break; |
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} |
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$checkSql = $createTableToken[$offset - 1]->getSql(); |
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$name = null; |
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$pattern = (new SqlTokenizer('CONSTRAINT any'))->tokenize(); |
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if (isset($createTableToken[$firstMatchIndex - 2]) && $createTableToken->matches($pattern, $firstMatchIndex - 2)) { |
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$name = $createTableToken[$firstMatchIndex - 1]->content; |
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} |
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$result[] = new CheckConstraint([ |
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'name' => $name, |
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'expression' => $checkSql, |
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]); |
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} |
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return $result; |
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} |
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/** |
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* {@inheritdoc} |
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* @throws NotSupportedException if this method is called. |
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*/ |
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protected function loadTableDefaultValues($tableName) |
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{ |
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throw new NotSupportedException('SQLite does not support default value constraints.'); |
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} |
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/** |
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* Creates a query builder for the MySQL database. |
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* This method may be overridden by child classes to create a DBMS-specific query builder. |
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* @return QueryBuilder query builder instance |
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*/ |
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public function createQueryBuilder() |
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{ |
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return Yii::createObject(QueryBuilder::className(), [$this->db]); |
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} |
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/** |
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* {@inheritdoc} |
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* @return ColumnSchemaBuilder column schema builder instance |
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*/ |
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public function createColumnSchemaBuilder($type, $length = null) |
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{ |
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return Yii::createObject(ColumnSchemaBuilder::className(), [$type, $length]); |
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} |
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/** |
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* Collects the table column metadata. |
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* @param TableSchema $table the table metadata |
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* @return bool whether the table exists in the database |
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*/ |
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protected function findColumns($table) |
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{ |
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$sql = 'PRAGMA table_info(' . $this->quoteSimpleTableName($table->name) . ')'; |
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$columns = $this->db->createCommand($sql)->queryAll(); |
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if (empty($columns)) { |
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return false; |
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} |
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foreach ($columns as $info) { |
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$column = $this->loadColumnSchema($info); |
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$table->columns[$column->name] = $column; |
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if ($column->isPrimaryKey) { |
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$table->primaryKey[] = $column->name; |
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} |
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} |
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if (count($table->primaryKey) === 1 && !strncasecmp($table->columns[$table->primaryKey[0]]->dbType, 'int', 3)) { |
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$table->sequenceName = ''; |
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$table->columns[$table->primaryKey[0]]->autoIncrement = true; |
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} |
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return true; |
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} |
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/** |
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* Collects the foreign key column details for the given table. |
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* @param TableSchema $table the table metadata |
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*/ |
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327 |
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protected function findConstraints($table) |
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{ |
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$sql = 'PRAGMA foreign_key_list(' . $this->quoteSimpleTableName($table->name) . ')'; |
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$keys = $this->db->createCommand($sql)->queryAll(); |
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foreach ($keys as $key) { |
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$id = (int) $key['id']; |
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if (!isset($table->foreignKeys[$id])) { |
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$table->foreignKeys[$id] = [$key['table'], $key['from'] => $key['to']]; |
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} else { |
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// composite FK |
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$table->foreignKeys[$id][$key['from']] = $key['to']; |
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} |
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} |
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} |
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/** |
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* Returns all unique indexes for the given table. |
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* |
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* Each array element is of the following structure: |
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* |
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* ```php |
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* [ |
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* 'IndexName1' => ['col1' [, ...]], |
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* 'IndexName2' => ['col2' [, ...]], |
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* ] |
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* ``` |
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* |
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* @param TableSchema $table the table metadata |
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* @return array all unique indexes for the given table. |
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*/ |
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public function findUniqueIndexes($table) |
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{ |
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$sql = 'PRAGMA index_list(' . $this->quoteSimpleTableName($table->name) . ')'; |
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$indexes = $this->db->createCommand($sql)->queryAll(); |
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1 |
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$uniqueIndexes = []; |
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1 |
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foreach ($indexes as $index) { |
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$indexName = $index['name']; |
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$indexInfo = $this->db->createCommand('PRAGMA index_info(' . $this->quoteValue($index['name']) . ')')->queryAll(); |
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1 |
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if ($index['unique']) { |
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$uniqueIndexes[$indexName] = []; |
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1 |
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foreach ($indexInfo as $row) { |
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$uniqueIndexes[$indexName][] = $row['name']; |
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} |
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} |
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} |
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return $uniqueIndexes; |
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} |
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/** |
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* Loads the column information into a [[ColumnSchema]] object. |
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* @param array $info column information |
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* @return ColumnSchema the column schema object |
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*/ |
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327 |
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protected function loadColumnSchema($info) |
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{ |
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327 |
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$column = $this->createColumnSchema(); |
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$column->name = $info['name']; |
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$column->allowNull = !$info['notnull']; |
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$column->isPrimaryKey = $info['pk'] != 0; |
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327 |
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$column->dbType = strtolower($info['type']); |
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327 |
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$column->unsigned = strpos($column->dbType, 'unsigned') !== false; |
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327 |
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$column->type = self::TYPE_STRING; |
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327 |
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if (preg_match('/^(\w+)(?:\(([^\)]+)\))?/', $column->dbType, $matches)) { |
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327 |
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$type = strtolower($matches[1]); |
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327 |
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if (isset($this->typeMap[$type])) { |
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$column->type = $this->typeMap[$type]; |
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} |
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if (!empty($matches[2])) { |
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$values = explode(',', $matches[2]); |
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$column->size = $column->precision = (int) $values[0]; |
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if (isset($values[1])) { |
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$column->scale = (int) $values[1]; |
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} |
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if ($column->size === 1 && ($type === 'tinyint' || $type === 'bit')) { |
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$column->type = 'boolean'; |
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} elseif ($type === 'bit') { |
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if ($column->size > 32) { |
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$column->type = 'bigint'; |
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} elseif ($column->size === 32) { |
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$column->type = 'integer'; |
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} |
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} |
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} |
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} |
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$column->phpType = $this->getColumnPhpType($column); |
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327 |
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if (!$column->isPrimaryKey) { |
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if ($info['dflt_value'] === 'null' || $info['dflt_value'] === '' || $info['dflt_value'] === null) { |
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$column->defaultValue = null; |
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} elseif ($column->type === 'timestamp' && $info['dflt_value'] === 'CURRENT_TIMESTAMP') { |
351
|
21 |
|
$column->defaultValue = new Expression('CURRENT_TIMESTAMP'); |
352
|
|
|
} else { |
353
|
146 |
|
$value = trim($info['dflt_value'], "'\""); |
354
|
146 |
|
$column->defaultValue = $column->phpTypecast($value); |
355
|
|
|
} |
356
|
|
|
} |
357
|
|
|
|
358
|
327 |
|
return $column; |
359
|
|
|
} |
360
|
|
|
|
361
|
|
|
/** |
362
|
|
|
* Sets the isolation level of the current transaction. |
363
|
|
|
* @param string $level The transaction isolation level to use for this transaction. |
364
|
|
|
* This can be either [[Transaction::READ_UNCOMMITTED]] or [[Transaction::SERIALIZABLE]]. |
365
|
|
|
* @throws NotSupportedException when unsupported isolation levels are used. |
366
|
|
|
* SQLite only supports SERIALIZABLE and READ UNCOMMITTED. |
367
|
|
|
* @see https://www.sqlite.org/pragma.html#pragma_read_uncommitted |
368
|
|
|
*/ |
369
|
2 |
|
public function setTransactionIsolationLevel($level) |
370
|
|
|
{ |
371
|
|
|
switch ($level) { |
372
|
2 |
|
case Transaction::SERIALIZABLE: |
373
|
1 |
|
$this->db->createCommand('PRAGMA read_uncommitted = False;')->execute(); |
374
|
1 |
|
break; |
375
|
2 |
|
case Transaction::READ_UNCOMMITTED: |
376
|
2 |
|
$this->db->createCommand('PRAGMA read_uncommitted = True;')->execute(); |
377
|
2 |
|
break; |
378
|
|
|
default: |
379
|
|
|
throw new NotSupportedException(get_class($this) . ' only supports transaction isolation levels READ UNCOMMITTED and SERIALIZABLE.'); |
380
|
|
|
} |
381
|
|
|
} |
382
|
|
|
|
383
|
|
|
/** |
384
|
|
|
* Returns table columns info. |
385
|
|
|
* @param string $tableName table name |
386
|
|
|
* @return array |
387
|
|
|
*/ |
388
|
31 |
|
private function loadTableColumnsInfo($tableName) |
389
|
|
|
{ |
390
|
31 |
|
$tableColumns = $this->db->createCommand('PRAGMA TABLE_INFO (' . $this->quoteValue($tableName) . ')')->queryAll(); |
391
|
31 |
|
$tableColumns = $this->normalizePdoRowKeyCase($tableColumns, true); |
392
|
|
|
|
393
|
31 |
|
return ArrayHelper::index($tableColumns, 'cid'); |
394
|
|
|
} |
395
|
|
|
|
396
|
|
|
/** |
397
|
|
|
* Loads multiple types of constraints and returns the specified ones. |
398
|
|
|
* @param string $tableName table name. |
399
|
|
|
* @param string $returnType return type: |
400
|
|
|
* - primaryKey |
401
|
|
|
* - indexes |
402
|
|
|
* - uniques |
403
|
|
|
* @return mixed constraints. |
404
|
|
|
*/ |
405
|
62 |
|
private function loadTableConstraints($tableName, $returnType) |
406
|
|
|
{ |
407
|
62 |
|
$indexes = $this->db->createCommand('PRAGMA INDEX_LIST (' . $this->quoteValue($tableName) . ')')->queryAll(); |
408
|
62 |
|
$indexes = $this->normalizePdoRowKeyCase($indexes, true); |
409
|
62 |
|
$tableColumns = null; |
410
|
62 |
|
if (!empty($indexes) && !isset($indexes[0]['origin'])) { |
411
|
|
|
/* |
412
|
|
|
* SQLite may not have an "origin" column in INDEX_LIST |
413
|
|
|
* See https://www.sqlite.org/src/info/2743846cdba572f6 |
414
|
|
|
*/ |
415
|
|
|
$tableColumns = $this->loadTableColumnsInfo($tableName); |
416
|
|
|
} |
417
|
62 |
|
$result = [ |
418
|
62 |
|
'primaryKey' => null, |
419
|
62 |
|
'indexes' => [], |
420
|
62 |
|
'uniques' => [], |
421
|
62 |
|
]; |
422
|
62 |
|
foreach ($indexes as $index) { |
423
|
52 |
|
$columns = $this->db->createCommand('PRAGMA INDEX_INFO (' . $this->quoteValue($index['name']) . ')')->queryAll(); |
424
|
52 |
|
$columns = $this->normalizePdoRowKeyCase($columns, true); |
425
|
52 |
|
ArrayHelper::multisort($columns, 'seqno', SORT_ASC, SORT_NUMERIC); |
426
|
52 |
|
if ($tableColumns !== null) { |
427
|
|
|
// SQLite may not have an "origin" column in INDEX_LIST |
428
|
|
|
$index['origin'] = 'c'; |
429
|
|
|
if (!empty($columns) && $tableColumns[$columns[0]['cid']]['pk'] > 0) { |
430
|
|
|
$index['origin'] = 'pk'; |
431
|
|
|
} elseif ($index['unique'] && $this->isSystemIdentifier($index['name'])) { |
432
|
|
|
$index['origin'] = 'u'; |
433
|
|
|
} |
434
|
|
|
} |
435
|
52 |
|
$result['indexes'][] = new IndexConstraint([ |
436
|
52 |
|
'isPrimary' => $index['origin'] === 'pk', |
437
|
52 |
|
'isUnique' => (bool) $index['unique'], |
438
|
52 |
|
'name' => $index['name'], |
439
|
52 |
|
'columnNames' => ArrayHelper::getColumn($columns, 'name'), |
440
|
52 |
|
]); |
441
|
52 |
|
if ($index['origin'] === 'u') { |
442
|
44 |
|
$result['uniques'][] = new Constraint([ |
443
|
44 |
|
'name' => $index['name'], |
444
|
44 |
|
'columnNames' => ArrayHelper::getColumn($columns, 'name'), |
445
|
44 |
|
]); |
446
|
32 |
|
} elseif ($index['origin'] === 'pk') { |
447
|
31 |
|
$result['primaryKey'] = new Constraint([ |
448
|
31 |
|
'columnNames' => ArrayHelper::getColumn($columns, 'name'), |
449
|
31 |
|
]); |
450
|
|
|
} |
451
|
|
|
} |
452
|
|
|
|
453
|
62 |
|
if ($result['primaryKey'] === null) { |
454
|
|
|
/* |
455
|
|
|
* Additional check for PK in case of INTEGER PRIMARY KEY with ROWID |
456
|
|
|
* See https://www.sqlite.org/lang_createtable.html#primkeyconst |
457
|
|
|
*/ |
458
|
31 |
|
if ($tableColumns === null) { |
459
|
31 |
|
$tableColumns = $this->loadTableColumnsInfo($tableName); |
460
|
|
|
} |
461
|
31 |
|
foreach ($tableColumns as $tableColumn) { |
462
|
31 |
|
if ($tableColumn['pk'] > 0) { |
463
|
21 |
|
$result['primaryKey'] = new Constraint([ |
464
|
21 |
|
'columnNames' => [$tableColumn['name']], |
465
|
21 |
|
]); |
466
|
21 |
|
break; |
467
|
|
|
} |
468
|
|
|
} |
469
|
|
|
} |
470
|
|
|
|
471
|
62 |
|
foreach ($result as $type => $data) { |
472
|
62 |
|
$this->setTableMetadata($tableName, $type, $data); |
473
|
|
|
} |
474
|
|
|
|
475
|
62 |
|
return $result[$returnType]; |
476
|
|
|
} |
477
|
|
|
|
478
|
|
|
/** |
479
|
|
|
* Return whether the specified identifier is a SQLite system identifier. |
480
|
|
|
* @param string $identifier |
481
|
|
|
* @return bool |
482
|
|
|
* @see https://www.sqlite.org/src/artifact/74108007d286232f |
483
|
|
|
*/ |
484
|
|
|
private function isSystemIdentifier($identifier) |
485
|
|
|
{ |
486
|
|
|
return strncmp($identifier, 'sqlite_', 7) === 0; |
487
|
|
|
} |
488
|
|
|
} |
489
|
|
|
|