* @since 2.0 */ class Schema extends \yii\db\Schema { /** * @inheritdoc */ public function init() { parent::init(); if ($this->defaultSchema === null) { $this->defaultSchema = $this->db->username; } } /** * @inheritdoc */ public function releaseSavepoint($name) { // does nothing as Oracle does not support this } /** * @inheritdoc */ public function quoteSimpleTableName($name) { return '"' . $name . '"'; } /** * @inheritdoc */ public function quoteSimpleColumnName($name) { return '"' . $name . '"'; } /** * @inheritdoc */ public function createQueryBuilder() { return new QueryBuilder($this->db); } /** * @inheritdoc */ public function loadTableSchema($name) { $table = new TableSchema(); $this->resolveTableNames($table, $name); if ($this->findColumns($table)) { $this->findConstraints($table); return $table; } else { return null; } } /** * Resolves the table name and schema name (if any). * * @param TableSchema $table the table metadata object * @param string $name the table name */ protected function resolveTableNames($table, $name) { $parts = explode('.', str_replace('"', '', $name)); if (isset($parts[1])) { $table->schemaName = $parts[0]; $table->name = $parts[1]; } else { $table->schemaName = $this->defaultSchema; $table->name = $name; } $table->fullName = $table->schemaName !== $this->defaultSchema ? $table->schemaName . '.' . $table->name : $table->name; } /** * Collects the table column metadata. * @param TableSchema $table the table schema * @return boolean whether the table exists */ protected function findColumns($table) { $schemaName = $table->schemaName; $tableName = $table->name; $sql = << 0 then ',' || a.data_scale else '' end || ')' when data_type = 'DATE' then '' when data_type = 'NUMBER' then '' else '(' || to_char(a.data_length) || ')' end as data_type, a.nullable, a.data_default, ( SELECT D.constraint_type FROM ALL_CONS_COLUMNS C inner join ALL_constraints D on D.OWNER = C.OWNER and D.constraint_name = C.constraint_name WHERE C.OWNER = B.OWNER and C.table_name = B.object_name and C.column_name = A.column_name and D.constraint_type = 'P') as Key, com.comments as column_comment FROM ALL_TAB_COLUMNS A inner join ALL_OBJECTS B ON b.owner = a.owner and ltrim(B.OBJECT_NAME) = ltrim(A.TABLE_NAME) LEFT JOIN all_col_comments com ON (A.owner = com.owner AND A.table_name = com.table_name AND A.column_name = com.column_name) WHERE a.owner = '{$schemaName}' and (b.object_type = 'TABLE' or b.object_type = 'VIEW') and b.object_name = '{$tableName}' ORDER by a.column_id EOD; try { $columns = $this->db->createCommand($sql)->queryAll(); } catch (\Exception $e) { return false; } foreach ($columns as $column) { $c = $this->createColumn($column); $table->columns[$c->name] = $c; if ($c->isPrimaryKey) { $table->primaryKey[] = $c->name; $table->sequenceName = ''; $c->autoIncrement = true; } } return true; } protected function createColumn($column) { $c = new ColumnSchema(); $c->name = $column['COLUMN_NAME']; $c->allowNull = $column['NULLABLE'] === 'Y'; $c->isPrimaryKey = strpos($column['KEY'], 'P') !== false; $c->comment = $column['COLUMN_COMMENT'] === null ? '' : $column['COLUMN_COMMENT']; $this->extractColumnType($c, $column['DATA_TYPE']); $this->extractColumnSize($c, $column['DATA_TYPE']); if (!$column->isPrimaryKey) { if (stripos($column['DATA_DEFAULT'], 'timestamp') !== false) { $c->defaultValue = null; } else { $c->defaultValue = $c->typecast($column['DATA_DEFAULT']); } } return $c; } protected function findConstraints($table) { $sql = << 'P' order by d.constraint_name, c.position EOD; $command = $this->db->createCommand($sql); foreach ($command->queryAll() as $row) { if ($row['CONSTRAINT_TYPE'] === 'R') { $name = $row["COLUMN_NAME"]; $table->foreignKeys[$name] = [$row["TABLE_REF"], $row["COLUMN_REF"]]; } } } /** * @inheritdoc */ protected function findTableNames($schema = '') { if ($schema === '') { $sql = <<db->createCommand($sql); } else { $sql = <<db->createCommand($sql); $command->bindParam(':schema', $schema); } $rows = $command->queryAll(); $names = []; foreach ($rows as $row) { $names[] = $row['TABLE_NAME']; } return $names; } /** * Extracts the data types for the given column * @param ColumnSchema $column * @param string $dbType DB type */ protected function extractColumnType($column, $dbType) { $column->dbType = $dbType; if (strpos($dbType, 'FLOAT') !== false) { $column->type = 'double'; } elseif (strpos($dbType, 'NUMBER') !== false || strpos($dbType, 'INTEGER') !== false) { if (strpos($dbType, '(') && preg_match('/\((.*)\)/', $dbType, $matches)) { $values = explode(',', $matches[1]); if (isset($values[1]) && (((int) $values[1]) > 0)) { $column->type = 'double'; } else { $column->type = 'integer'; } } else { $column->type = 'double'; } } else { $column->type = 'string'; } } /** * Extracts size, precision and scale information from column's DB type. * @param ColumnSchema $column * @param string $dbType the column's DB type */ protected function extractColumnSize($column, $dbType) { if (strpos($dbType, '(') && preg_match('/\((.*)\)/', $dbType, $matches)) { $values = explode(',', $matches[1]); $column->size = $column->precision = (int) $values[0]; if (isset($values[1])) { $column->scale = (int) $values[1]; } } } }