dsn)) { $this->dsn = 'oci:dbname='; // Oracle has a slightly different PDO DSN format (Easy Connect), // which also supports pre-defined DSNs. if (empty($this->hostname) && empty($this->port)) { $this->dsn .= $this->database; } else { $this->dsn .= '//'.(empty($this->hostname) ? '127.0.0.1' : $this->hostname) .(empty($this->port) ? '' : ':'.$this->port).'/'; empty($this->database) OR $this->dsn .= $this->database; } empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set; } elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 4) === FALSE) { $this->dsn .= ';charset='.$this->char_set; } } // -------------------------------------------------------------------- /** * Database version number * * @return string */ public function version() { if (isset($this->data_cache['version'])) { return $this->data_cache['version']; } $version_string = parent::version(); if (preg_match('#(Release\s)?(?\d+(?:\.\d+)+)#', $version_string, $match)) { return $this->data_cache['version'] = $match['version']; } return FALSE; } // -------------------------------------------------------------------- /** * Show table query * * Generates a platform-specific query string so that the table names can be fetched * * @param bool $prefix_limit * @return string */ protected function _list_tables($prefix_limit = FALSE) { $sql = 'SELECT "TABLE_NAME" FROM "ALL_TABLES"'; if ($prefix_limit === TRUE && $this->dbprefix !== '') { return $sql.' WHERE "TABLE_NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' " .sprintf($this->_like_escape_str, $this->_like_escape_chr); } return $sql; } // -------------------------------------------------------------------- /** * Show column query * * Generates a platform-specific query string so that the column names can be fetched * * @param string $table * @return string */ protected function _list_columns($table = '') { if (strpos($table, '.') !== FALSE) { sscanf($table, '%[^.].%s', $owner, $table); } else { $owner = $this->username; } return 'SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS WHERE UPPER(OWNER) = '.$this->escape(strtoupper($owner)).' AND UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table)); } // -------------------------------------------------------------------- /** * Returns an object with field data * * @param string $table * @return array */ public function field_data($table) { if (strpos($table, '.') !== FALSE) { sscanf($table, '%[^.].%s', $owner, $table); } else { $owner = $this->username; } $sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHAR_LENGTH, DATA_PRECISION, DATA_LENGTH, DATA_DEFAULT, NULLABLE FROM ALL_TAB_COLUMNS WHERE UPPER(OWNER) = '.$this->escape(strtoupper($owner)).' AND UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table)); if (($query = $this->query($sql)) === FALSE) { return FALSE; } $query = $query->result_object(); $retval = array(); for ($i = 0, $c = count($query); $i < $c; $i++) { $retval[$i] = new stdClass(); $retval[$i]->name = $query[$i]->COLUMN_NAME; $retval[$i]->type = $query[$i]->DATA_TYPE; $length = ($query[$i]->CHAR_LENGTH > 0) ? $query[$i]->CHAR_LENGTH : $query[$i]->DATA_PRECISION; if ($length === NULL) { $length = $query[$i]->DATA_LENGTH; } $retval[$i]->max_length = $length; $default = $query[$i]->DATA_DEFAULT; if ($default === NULL && $query[$i]->NULLABLE === 'N') { $default = ''; } $retval[$i]->default = $query[$i]->COLUMN_DEFAULT; } return $retval; } // -------------------------------------------------------------------- /** * Insert batch statement * * @param string $table Table name * @param array $keys INSERT keys * @param array $values INSERT values * @return string */ protected function _insert_batch($table, $keys, $values) { $keys = implode(', ', $keys); $sql = "INSERT ALL\n"; for ($i = 0, $c = count($values); $i < $c; $i++) { $sql .= ' INTO '.$table.' ('.$keys.') VALUES '.$values[$i]."\n"; } return $sql.'SELECT * FROM dual'; } // -------------------------------------------------------------------- /** * Delete statement * * Generates a platform-specific delete string from the supplied data * * @param string $table * @return string */ protected function _delete($table) { if ($this->qb_limit) { $this->where('rownum <= ',$this->qb_limit, FALSE); $this->qb_limit = FALSE; } return parent::_delete($table); } // -------------------------------------------------------------------- /** * LIMIT * * Generates a platform-specific LIMIT clause * * @param string $sql SQL Query * @return string */ protected function _limit($sql) { if (version_compare($this->version(), '12.1', '>=')) { // OFFSET-FETCH can be used only with the ORDER BY clause empty($this->qb_orderby) && $sql .= ' ORDER BY 1'; return $sql.' OFFSET '.(int) $this->qb_offset.' ROWS FETCH NEXT '.$this->qb_limit.' ROWS ONLY'; } return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($this->qb_offset + $this->qb_limit + 1).')' .($this->qb_offset ? ' WHERE rnum >= '.($this->qb_offset + 1): ''); } }