diff options
Diffstat (limited to 'system/database/drivers/interbase/interbase_driver.php')
| -rw-r--r-- | system/database/drivers/interbase/interbase_driver.php | 252 |
1 files changed, 56 insertions, 196 deletions
diff --git a/system/database/drivers/interbase/interbase_driver.php b/system/database/drivers/interbase/interbase_driver.php index bacb6688c..6587d72ff 100644 --- a/system/database/drivers/interbase/interbase_driver.php +++ b/system/database/drivers/interbase/interbase_driver.php @@ -2,7 +2,7 @@ /** * CodeIgniter * - * An open source application development framework for PHP 5.1.6 or newer + * An open source application development framework for PHP 5.2.4 or newer * * NOTICE OF LICENSE * @@ -25,8 +25,6 @@ * @filesource */ -// ------------------------------------------------------------------------ - /** * Firebird/Interbase Database Adapter Class * @@ -56,8 +54,8 @@ class CI_DB_interbase_driver extends CI_DB { * database engines, so this string appears in each driver and is * used for the count_all() and count_all_results() functions. */ - protected $_count_string = "SELECT COUNT(*) AS "; - protected $_random_keyword = ' Random()'; // database specific random keyword + protected $_count_string = 'SELECT COUNT(*) AS '; + protected $_random_keyword = ' Random()'; // database specific random keyword // Keeps track of the resource for the current transaction protected $trans; @@ -87,34 +85,6 @@ class CI_DB_interbase_driver extends CI_DB { // -------------------------------------------------------------------- /** - * Reconnect - * - * Keep / reestablish the db connection if no queries have been - * sent for a length of time exceeding the server's idle timeout - * - * @return void - */ - public function reconnect() - { - // not implemented in Interbase/Firebird - } - - // -------------------------------------------------------------------- - - /** - * Select the database - * - * @return bool - */ - public function db_select() - { - // Connection selects the database - return TRUE; - } - - // -------------------------------------------------------------------- - - /** * Database version number * * @return string @@ -148,41 +118,20 @@ class CI_DB_interbase_driver extends CI_DB { */ protected function _execute($sql) { - $sql = $this->_prep_query($sql); return @ibase_query($this->conn_id, $sql); } // -------------------------------------------------------------------- /** - * Prep the query - * - * If needed, each database adapter can prep the query string - * - * @param string an SQL query - * @return string - */ - protected function _prep_query($sql) - { - return $sql; - } - - // -------------------------------------------------------------------- - - /** * Begin Transaction * * @return bool */ public function trans_begin($test_mode = FALSE) { - if ( ! $this->trans_enabled) - { - return TRUE; - } - // When transactions are nested we only begin/commit/rollback the outermost ones - if ($this->_trans_depth > 0) + if ( ! $this->trans_enabled OR $this->_trans_depth > 0) { return TRUE; } @@ -190,7 +139,7 @@ class CI_DB_interbase_driver extends CI_DB { // Reset the transaction failure flag. // If the $test_mode flag is set to TRUE transactions will be rolled back // even if the queries produce a successful result. - $this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE; + $this->_trans_failure = ($test_mode === TRUE); $this->trans = @ibase_trans($this->conn_id); @@ -206,13 +155,8 @@ class CI_DB_interbase_driver extends CI_DB { */ public function trans_commit() { - if ( ! $this->trans_enabled) - { - return TRUE; - } - // When transactions are nested we only begin/commit/rollback the outermost ones - if ($this->_trans_depth > 0) + if ( ! $this->trans_enabled OR $this->_trans->depth > 0) { return TRUE; } @@ -229,13 +173,8 @@ class CI_DB_interbase_driver extends CI_DB { */ public function trans_rollback() { - if ( ! $this->trans_enabled) - { - return TRUE; - } - // When transactions are nested we only begin/commit/rollback the outermost ones - if ($this->_trans_depth > 0) + if ( ! $this->trans_enabled OR $this->_trans_depth > 0) { return TRUE; } @@ -267,9 +206,9 @@ class CI_DB_interbase_driver extends CI_DB { // escape LIKE condition wildcards if ($like === TRUE) { - $str = str_replace( array('%', '_', $this->_like_escape_chr), - array($this->_like_escape_chr.'%', $this->_like_escape_chr.'_', $this->_like_escape_chr.$this->_like_escape_chr), - $str); + return str_replace(array($this->_like_escape_chr, '%', '_'), + array($this->_like_escape_chr.$this->_like_escape_chr, $this->_like_escape_chr.'%', $this->_like_escape_chr.'_'), + $str); } return $str; @@ -280,7 +219,7 @@ class CI_DB_interbase_driver extends CI_DB { /** * Affected Rows * - * @return integer + * @return int */ public function affected_rows() { @@ -292,9 +231,9 @@ class CI_DB_interbase_driver extends CI_DB { /** * Insert ID * - * @param string $generator_name - * @param integer $inc_by - * @return integer + * @param string $generator_name + * @param int $inc_by + * @return int */ public function insert_id($generator_name, $inc_by=0) { @@ -326,9 +265,9 @@ class CI_DB_interbase_driver extends CI_DB { return 0; } - $row = $query->row(); + $query = $query->row(); $this->_reset_select(); - return (int) $row->numrows; + return (int) $query->numrows; } // -------------------------------------------------------------------- @@ -338,21 +277,18 @@ class CI_DB_interbase_driver extends CI_DB { * * Generates a platform-specific query string so that the table names can be fetched * - * @param boolean + * @param bool * @return string */ protected function _list_tables($prefix_limit = FALSE) { - $sql = <<<SQL - SELECT "RDB\$RELATION_NAME" FROM "RDB\$RELATIONS" - WHERE "RDB\$RELATION_NAME" NOT LIKE 'RDB$%' - AND "RDB\$RELATION_NAME" NOT LIKE 'MON$%' -SQL; + $sql = 'SELECT "RDB$RELATION_NAME" FROM "RDB$RELATIONS" WHERE "RDB$RELATION_NAME" NOT LIKE \'RDB$%\' AND "RDB$RELATION_NAME" NOT LIKE \'MON$%\''; - if ($prefix_limit !== FALSE AND $this->dbprefix != '') + if ($prefix_limit !== FALSE && $this->dbprefix != '') { - $sql .= ' AND "RDB$RELATION_NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr); + return $sql.' AND "RDB$RELATION_NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr); } + return $sql; } @@ -368,10 +304,7 @@ SQL; */ protected function _list_columns($table = '') { - return <<<SQL - SELECT "RDB\$FIELD_NAME" FROM "RDB\$RELATION_FIELDS" - WHERE "RDB\$RELATION_NAME"='{$table}'; -SQL; + return 'SELECT "RDB$FIELD_NAME" FROM "RDB$RELATION_FIELDS" WHERE "RDB$RELATION_NAME" = \''.$this->escape_str($table)."'"; } // -------------------------------------------------------------------- @@ -382,14 +315,14 @@ SQL; * Generates a platform-specific query so that the column data can be retrieved * * @param string the table name - * @return object + * @return string */ protected function _field_data($table) { // Need to find a more efficient way to do this // but Interbase/Firebird seems to lack the // limit clause - return "SELECT * FROM {$table}"; + return 'SELECT * FROM '.$table; } // -------------------------------------------------------------------- @@ -410,49 +343,13 @@ SQL; // -------------------------------------------------------------------- /** - * Escape the SQL Identifiers - * - * This public function escapes column and table names - * - * @param string - * @return string - */ - protected function _escape_identifiers($item) - { - foreach ($this->_reserved_identifiers as $id) - { - if (strpos($item, '.'.$id) !== FALSE) - { - $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item); - - // remove duplicates if the user already included the escape - return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str); - } - } - - if (strpos($item, '.') !== FALSE) - { - $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char; - } - else - { - $str = $this->_escape_char.$item.$this->_escape_char; - } - - // remove duplicates if the user already included the escape - return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str); - } - - // -------------------------------------------------------------------- - - /** * From Tables * * This public function implicitly groups FROM tables so there is no confusion * about operator precedence in harmony with SQL standards * - * @param type - * @return type + * @param array + * @return string */ protected function _from_tables($tables) { @@ -468,23 +365,6 @@ SQL; // -------------------------------------------------------------------- /** - * Insert statement - * - * Generates a platform-specific insert string from the supplied data - * - * @param string the table name - * @param array the insert keys - * @param array the insert values - * @return string - */ - protected function _insert($table, $keys, $values) - { - return "INSERT INTO {$table} (".implode(', ', $keys).') VALUES ('.implode(', ', $values).')'; - } - - // -------------------------------------------------------------------- - - /** * Update statement * * Generates a platform-specific update string from the supplied data @@ -493,27 +373,27 @@ SQL; * @param array the update data * @param array the where clause * @param array the orderby clause - * @param array the limit clause + * @param array the limit clause (ignored) + * @param array the like clause * @return string */ - protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE) + protected function _update($table, $values, $where, $orderby = array(), $limit = FALSE, $like = array()) { foreach ($values as $key => $val) { - $valstr[] = $key." = ".$val; + $valstr[] = $key.' = '.$val; } - //$limit = ( ! $limit) ? '' : ' LIMIT '.$limit; - - $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):''; - - $sql = "UPDATE {$table} SET ".implode(', ', $valstr); + $where = empty($where) ? '' : ' WHERE '.implode(' ', $where); - $sql .= ($where != '' AND count($where) >=1) ? ' WHERE '.implode(' ', $where) : ''; - - $sql .= $orderby; + if ( ! empty($like)) + { + $where .= ($where === '' ? ' WHERE ' : ' AND ').implode(' ', $like); + } - return $sql; + return 'UPDATE '.$table.' SET '.implode(', ', $valstr) + .$where + .(count($orderby) > 0 ? ' ORDER BY '.implode(', ', $orderby) : ''); } @@ -523,15 +403,16 @@ SQL; * Truncate statement * * Generates a platform-specific truncate string from the supplied data - * If the database does not support the truncate() command - * This public function maps to "DELETE FROM table" + * + * If the database does not support the truncate() command, + * then this method maps to 'DELETE FROM table' * * @param string the table name * @return string */ protected function _truncate($table) { - return $this->_delete($table); + return 'DELETE FROM '.$table; } // -------------------------------------------------------------------- @@ -543,28 +424,18 @@ SQL; * * @param string the table name * @param array the where clause - * @param string the limit clause + * @param array the like clause + * @param string the limit clause (ignored) * @return string */ protected function _delete($table, $where = array(), $like = array(), $limit = FALSE) { - $conditions = ''; + $conditions = array(); - if (count($where) > 0 OR count($like) > 0) - { - $conditions = "\nWHERE "; - $conditions .= implode("\n", $this->ar_where); + empty($where) OR $conditions[] = implode(' ', $where); + empty($like) OR $conditions[] = implode(' ', $like); - if (count($where) > 0 && count($like) > 0) - { - $conditions .= ' AND '; - } - $conditions .= implode("\n", $like); - } - - //$limit = ( ! $limit) ? '' : ' LIMIT '.$limit; - - return "DELETE FROM {$table}{$conditions}"; + return 'DELETE FROM '.$table.(count($conditions) > 0 ? ' WHERE '.implode(' AND ', $conditions) : ''); } // -------------------------------------------------------------------- @@ -575,36 +446,25 @@ SQL; * Generates a platform-specific LIMIT clause * * @param string the sql query string - * @param integer the number of rows to limit the query to - * @param integer the offset value + * @param int the number of rows to limit the query to + * @param int the offset value * @return string */ protected function _limit($sql, $limit, $offset) { - // Keep the current sql string safe for a moment - $orig_sql = $sql; - // Limit clause depends on if Interbase or Firebird if (stripos($this->version(), 'firebird') !== FALSE) { - $sql = 'FIRST '. (int) $limit; - - if ($offset > 0) - { - $sql .= ' SKIP '. (int) $offset; - } + $select = 'FIRST '. (int) $limit + .($offset > 0 ? ' SKIP '. (int) $offset : ''); } else { - $sql = 'ROWS ' . (int) $limit; - - if ($offset > 0) - { - $sql = 'ROWS '. (int) $offset . ' TO ' . ($limit + $offset); - } + $select = 'ROWS ' + .($offset > 0 ? (int) $offset.' TO '.($limit + $offset) : (int) $limit); } - return preg_replace('`SELECT`i', "SELECT {$sql}", $orig_sql); + return preg_replace('`SELECT`i', 'SELECT '.$select, $sql); } // -------------------------------------------------------------------- @@ -623,4 +483,4 @@ SQL; } /* End of file interbase_driver.php */ -/* Location: ./system/database/drivers/interbase/interbase_driver.php */ +/* Location: ./system/database/drivers/interbase/interbase_driver.php */
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