From 3b0130d97409bc0d983aa812b50e579cc53b8e48 Mon Sep 17 00:00:00 2001 From: Andrey Andreev Date: Sun, 24 Jun 2012 21:41:42 +0300 Subject: Add pdo_oci subdriver --- system/database/drivers/pdo/pdo_driver.php | 49 ++-- .../drivers/pdo/subdrivers/pdo_oci_driver.php | 248 +++++++++++++++++++++ 2 files changed, 264 insertions(+), 33 deletions(-) create mode 100644 system/database/drivers/pdo/subdrivers/pdo_oci_driver.php (limited to 'system/database') diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php index dc03864a6..9fbdfdd55 100644 --- a/system/database/drivers/pdo/pdo_driver.php +++ b/system/database/drivers/pdo/pdo_driver.php @@ -167,7 +167,7 @@ class CI_DB_pdo_driver extends CI_DB { } // Add charset to the DSN, if needed - if ( ! empty($this->char_set) && in_array($this->subdriver, array('4D', 'sybase', 'mssql', 'dblib', 'oci'))) + if ( ! empty($this->char_set) && in_array($this->subdriver, array('4D', 'sybase', 'mssql', 'dblib'))) { $this->dsn .= 'charset='.$this->char_set.';'; } @@ -178,37 +178,13 @@ class CI_DB_pdo_driver extends CI_DB { /** * Non-persistent database connection * - * @return object - */ - public function db_connect() - { - return $this->_pdo_connect(); - } - - // -------------------------------------------------------------------- - - /** - * Persistent database connection - * - * @return object - */ - public function db_pconnect() - { - return $this->_pdo_connect(TRUE); - } - - // -------------------------------------------------------------------- - - /** - * PDO connection - * * @param bool * @return object */ - protected function _pdo_connect($persistent = FALSE) + public function db_connect($persistent = FALSE) { $this->options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT; - $persistent === FALSE OR $this->options[PDO::ATTR_PERSISTENT] = TRUE; + $this->options[PDO::ATTR_PERSISTENT] = $persistent; // Connecting... try @@ -228,6 +204,18 @@ class CI_DB_pdo_driver extends CI_DB { // -------------------------------------------------------------------- + /** + * Persistent database connection + * + * @return object + */ + public function db_pconnect() + { + return $this->db_connect(TRUE); + } + + // -------------------------------------------------------------------- + /** * Database version number * @@ -435,12 +423,7 @@ class CI_DB_pdo_driver extends CI_DB { */ protected function _field_data($table) { - if ($this->subdriver === 'oci') - { - // Analog function for oci - return 'SELECT * FROM '.$this->escape_identifiers($table).' WHERE ROWNUM <= 1'; - } - elseif ($this->subdriver === 'sqlite') + if ($this->subdriver === 'sqlite') { // Analog function for sqlite return 'PRAGMA table_info('.$this->escape_identifiers($table).')'; diff --git a/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php b/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php new file mode 100644 index 000000000..f728ce9b4 --- /dev/null +++ b/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php @@ -0,0 +1,248 @@ +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) ? 'localhost' : $this->hostname) + .(empty($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; + } + } + + // -------------------------------------------------------------------- + + /** + * Show table query + * + * Generates a platform-specific query string so that the table names can be fetched + * + * @param bool + * @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 $sql; + } + + // -------------------------------------------------------------------- + + /** + * Show column query + * + * Generates a platform-specific query string so that the column names can be fetched + * + * @param string the table name + * @return string + */ + protected function _list_columns($table = '') + { + return 'SELECT "COLUMN_NAME" FROM "all_tab_columns" WHERE "TABLE_NAME" = '.$this->escape($table); + } + + // -------------------------------------------------------------------- + + /** + * Field data query + * + * Generates a platform-specific query so that the column data can be retrieved + * + * @param string the table name + * @return string + */ + protected function _field_data($table) + { + return 'SELECT * FROM '.$this->protect_identifiers($table).' WHERE rownum = 1'; + } + + // -------------------------------------------------------------------- + + /** + * From Tables + * + * This function implicitly groups FROM tables so there is no confusion + * about operator precedence in harmony with SQL standards + * + * @param array + * @return string + */ + protected function _from_tables($tables) + { + return is_array($tables) ? implode(', ', $tables) : $tables; + } + + // -------------------------------------------------------------------- + + /** + * Insert_batch statement + * + * @param string the table name + * @param array the insert keys + * @param array the insert values + * @return string + */ + protected function _insert_batch($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 $sql.'SELECT * FROM dual'; + } + + // -------------------------------------------------------------------- + + /** + * Truncate statement + * + * Generates a platform-specific truncate string from the supplied data + * + * If the database does not support the truncate() command, + * then this method maps to 'DELETE FROM table' + * + * @param string the table name + * @return string + */ + protected function _truncate($table) + { + return 'TRUNCATE TABLE '.$table; + } + + // -------------------------------------------------------------------- + + /** + * Delete statement + * + * Generates a platform-specific delete string from the supplied data + * + * @param string the table name + * @param array the where clause + * @param array the like clause + * @param string the limit clause + * @return string + */ + protected function _delete($table, $where = array(), $like = array(), $limit = FALSE) + { + $conditions = array(); + + empty($where) OR $conditions[] = implode(' ', $where); + empty($like) OR $conditions[] = implode(' ', $like); + empty($limit) OR $conditions[] = 'rownum <= '.$limit; + + return 'DELETE FROM '.$table.(count($conditions) > 0 ? ' WHERE '.implode(' AND ', $conditions) : ''); + } + + // -------------------------------------------------------------------- + + /** + * Limit string + * + * Generates a platform-specific LIMIT clause + * + * @param string the sql query string + * @param int the number of rows to limit the query to + * @param int the offset value + * @return string + */ + protected function _limit($sql, $limit, $offset) + { + return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($offset + $limit).')' + .($offset ? ' WHERE rnum >= '.$offset : ''); + } + +} + +/* End of file pdo_oci_driver.php */ +/* Location: ./system/database/drivers/pdo/subdrivers/pdo_oci_driver.php */ \ No newline at end of file -- cgit v1.2.3-24-g4f1b