--- /dev/null
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.1.6 or newer
+ *
+ * @package CodeIgniter
+ * @author ExpressionEngine Dev Team
+ * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
+ * @license http://codeigniter.com/user_guide/license.html
+ * @link http://codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * oci8 Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the active record
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author ExpressionEngine Dev Team
+ * @link http://codeigniter.com/user_guide/database/
+ */
+
+/**
+ * oci8 Database Adapter Class
+ *
+ * This is a modification of the DB_driver class to
+ * permit access to oracle databases
+ *
+ * NOTE: this uses the PHP 4 oci methods
+ *
+ * @author Kelly McArdle
+ *
+ */
+
+class CI_DB_oci8_driver extends CI_DB {
+
+ var $dbdriver = 'oci8';
+
+ // The character used for excaping
+ var $_escape_char = '"';
+
+ // clause and character used for LIKE escape sequences
+ var $_like_escape_str = " escape '%s' ";
+ var $_like_escape_chr = '!';
+
+ /**
+ * The syntax to count rows is slightly different across different
+ * database engines, so this string appears in each driver and is
+ * used for the count_all() and count_all_results() functions.
+ */
+ var $_count_string = "SELECT COUNT(1) AS ";
+ var $_random_keyword = ' ASC'; // not currently supported
+
+ // Set "auto commit" by default
+ var $_commit = OCI_COMMIT_ON_SUCCESS;
+
+ // need to track statement id and cursor id
+ var $stmt_id;
+ var $curs_id;
+
+ // if we use a limit, we will add a field that will
+ // throw off num_fields later
+ var $limit_used;
+
+ /**
+ * Non-persistent database connection
+ *
+ * @access private called by the base class
+ * @return resource
+ */
+ function db_connect()
+ {
+ return @ocilogon($this->username, $this->password, $this->hostname);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Persistent database connection
+ *
+ * @access private called by the base class
+ * @return resource
+ */
+ function db_pconnect()
+ {
+ return @ociplogon($this->username, $this->password, $this->hostname);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Reconnect
+ *
+ * Keep / reestablish the db connection if no queries have been
+ * sent for a length of time exceeding the server's idle timeout
+ *
+ * @access public
+ * @return void
+ */
+ function reconnect()
+ {
+ // not implemented in oracle
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Select the database
+ *
+ * @access private called by the base class
+ * @return resource
+ */
+ function db_select()
+ {
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set client character set
+ *
+ * @access public
+ * @param string
+ * @param string
+ * @return resource
+ */
+ function db_set_charset($charset, $collation)
+ {
+ // @todo - add support if needed
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Version number query string
+ *
+ * @access public
+ * @return string
+ */
+ function _version()
+ {
+ return ociserverversion($this->conn_id);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Execute the query
+ *
+ * @access private called by the base class
+ * @param string an SQL query
+ * @return resource
+ */
+ function _execute($sql)
+ {
+ // oracle must parse the query before it is run. All of the actions with
+ // the query are based on the statement id returned by ociparse
+ $this->stmt_id = FALSE;
+ $this->_set_stmt_id($sql);
+ ocisetprefetch($this->stmt_id, 1000);
+ return @ociexecute($this->stmt_id, $this->_commit);
+ }
+
+ /**
+ * Generate a statement ID
+ *
+ * @access private
+ * @param string an SQL query
+ * @return none
+ */
+ function _set_stmt_id($sql)
+ {
+ if ( ! is_resource($this->stmt_id))
+ {
+ $this->stmt_id = ociparse($this->conn_id, $this->_prep_query($sql));
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Prep the query
+ *
+ * If needed, each database adapter can prep the query string
+ *
+ * @access private called by execute()
+ * @param string an SQL query
+ * @return string
+ */
+ function _prep_query($sql)
+ {
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * getCursor. Returns a cursor from the datbase
+ *
+ * @access public
+ * @return cursor id
+ */
+ function get_cursor()
+ {
+ $this->curs_id = ocinewcursor($this->conn_id);
+ return $this->curs_id;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Stored Procedure. Executes a stored procedure
+ *
+ * @access public
+ * @param package package stored procedure is in
+ * @param procedure stored procedure to execute
+ * @param params array of parameters
+ * @return array
+ *
+ * params array keys
+ *
+ * KEY OPTIONAL NOTES
+ * name no the name of the parameter should be in :<param_name> format
+ * value no the value of the parameter. If this is an OUT or IN OUT parameter,
+ * this should be a reference to a variable
+ * type yes the type of the parameter
+ * length yes the max size of the parameter
+ */
+ function stored_procedure($package, $procedure, $params)
+ {
+ if ($package == '' OR $procedure == '' OR ! is_array($params))
+ {
+ if ($this->db_debug)
+ {
+ log_message('error', 'Invalid query: '.$package.'.'.$procedure);
+ return $this->display_error('db_invalid_query');
+ }
+ return FALSE;
+ }
+
+ // build the query string
+ $sql = "begin $package.$procedure(";
+
+ $have_cursor = FALSE;
+ foreach ($params as $param)
+ {
+ $sql .= $param['name'] . ",";
+
+ if (array_key_exists('type', $param) && ($param['type'] == OCI_B_CURSOR))
+ {
+ $have_cursor = TRUE;
+ }
+ }
+ $sql = trim($sql, ",") . "); end;";
+
+ $this->stmt_id = FALSE;
+ $this->_set_stmt_id($sql);
+ $this->_bind_params($params);
+ $this->query($sql, FALSE, $have_cursor);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Bind parameters
+ *
+ * @access private
+ * @return none
+ */
+ function _bind_params($params)
+ {
+ if ( ! is_array($params) OR ! is_resource($this->stmt_id))
+ {
+ return;
+ }
+
+ foreach ($params as $param)
+ {
+ foreach (array('name', 'value', 'type', 'length') as $val)
+ {
+ if ( ! isset($param[$val]))
+ {
+ $param[$val] = '';
+ }
+ }
+
+ ocibindbyname($this->stmt_id, $param['name'], $param['value'], $param['length'], $param['type']);
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Begin Transaction
+ *
+ * @access public
+ * @return bool
+ */
+ function trans_begin($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)
+ {
+ return TRUE;
+ }
+
+ // 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->_commit = OCI_DEFAULT;
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Commit Transaction
+ *
+ * @access public
+ * @return bool
+ */
+ 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)
+ {
+ return TRUE;
+ }
+
+ $ret = OCIcommit($this->conn_id);
+ $this->_commit = OCI_COMMIT_ON_SUCCESS;
+ return $ret;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Rollback Transaction
+ *
+ * @access public
+ * @return bool
+ */
+ 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)
+ {
+ return TRUE;
+ }
+
+ $ret = OCIrollback($this->conn_id);
+ $this->_commit = OCI_COMMIT_ON_SUCCESS;
+ return $ret;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Escape String
+ *
+ * @access public
+ * @param string
+ * @param bool whether or not the string will be used in a LIKE condition
+ * @return string
+ */
+ function escape_str($str, $like = FALSE)
+ {
+ if (is_array($str))
+ {
+ foreach ($str as $key => $val)
+ {
+ $str[$key] = $this->escape_str($val, $like);
+ }
+
+ return $str;
+ }
+
+ $str = remove_invisible_characters($str);
+
+ // 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 $str;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Affected Rows
+ *
+ * @access public
+ * @return integer
+ */
+ function affected_rows()
+ {
+ return @ocirowcount($this->stmt_id);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert ID
+ *
+ * @access public
+ * @return integer
+ */
+ function insert_id()
+ {
+ // not supported in oracle
+ return $this->display_error('db_unsupported_function');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * "Count All" query
+ *
+ * Generates a platform-specific query string that counts all records in
+ * the specified database
+ *
+ * @access public
+ * @param string
+ * @return string
+ */
+ function count_all($table = '')
+ {
+ if ($table == '')
+ {
+ return 0;
+ }
+
+ $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));
+
+ if ($query == FALSE)
+ {
+ return 0;
+ }
+
+ $row = $query->row();
+ return (int) $row->numrows;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @access private
+ * @param boolean
+ * @return string
+ */
+ function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = "SELECT TABLE_NAME FROM ALL_TABLES";
+
+ if ($prefix_limit !== FALSE AND $this->dbprefix != '')
+ {
+ $sql .= " WHERE TABLE_NAME LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @access public
+ * @param string the table name
+ * @return string
+ */
+ function _list_columns($table = '')
+ {
+ return "SELECT COLUMN_NAME FROM all_tab_columns WHERE table_name = '$table'";
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field data query
+ *
+ * Generates a platform-specific query so that the column data can be retrieved
+ *
+ * @access public
+ * @param string the table name
+ * @return object
+ */
+ function _field_data($table)
+ {
+ return "SELECT * FROM ".$table." where rownum = 1";
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * The error message string
+ *
+ * @access private
+ * @return string
+ */
+ function _error_message()
+ {
+ $error = ocierror($this->conn_id);
+ return $error['message'];
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * The error message number
+ *
+ * @access private
+ * @return integer
+ */
+ function _error_number()
+ {
+ $error = ocierror($this->conn_id);
+ return $error['code'];
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Escape the SQL Identifiers
+ *
+ * This function escapes column and table names
+ *
+ * @access private
+ * @param string
+ * @return string
+ */
+ function _escape_identifiers($item)
+ {
+ if ($this->_escape_char == '')
+ {
+ return $item;
+ }
+
+ foreach ($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, $str);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * From Tables
+ *
+ * This function implicitly groups FROM tables so there is no confusion
+ * about operator precedence in harmony with SQL standards
+ *
+ * @access public
+ * @param type
+ * @return type
+ */
+ function _from_tables($tables)
+ {
+ if ( ! is_array($tables))
+ {
+ $tables = array($tables);
+ }
+
+ return implode(', ', $tables);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert statement
+ *
+ * Generates a platform-specific insert string from the supplied data
+ *
+ * @access public
+ * @param string the table name
+ * @param array the insert keys
+ * @param array the insert values
+ * @return string
+ */
+ function _insert($table, $keys, $values)
+ {
+ return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update statement
+ *
+ * Generates a platform-specific update string from the supplied data
+ *
+ * @access public
+ * @param string the table name
+ * @param array the update data
+ * @param array the where clause
+ * @param array the orderby clause
+ * @param array the limit clause
+ * @return string
+ */
+ function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
+ {
+ foreach ($values as $key => $val)
+ {
+ $valstr[] = $key." = ".$val;
+ }
+
+ $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
+
+ $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
+
+ $sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
+
+ $sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
+
+ $sql .= $orderby.$limit;
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Truncate statement
+ *
+ * Generates a platform-specific truncate string from the supplied data
+ * If the database does not support the truncate() command
+ * This function maps to "DELETE FROM table"
+ *
+ * @access public
+ * @param string the table name
+ * @return string
+ */
+ function _truncate($table)
+ {
+ return "TRUNCATE TABLE ".$table;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @access public
+ * @param string the table name
+ * @param array the where clause
+ * @param string the limit clause
+ * @return string
+ */
+ function _delete($table, $where = array(), $like = array(), $limit = FALSE)
+ {
+ $conditions = '';
+
+ if (count($where) > 0 OR count($like) > 0)
+ {
+ $conditions = "\nWHERE ";
+ $conditions .= implode("\n", $this->ar_where);
+
+ if (count($where) > 0 && count($like) > 0)
+ {
+ $conditions .= " AND ";
+ }
+ $conditions .= implode("\n", $like);
+ }
+
+ $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
+
+ return "DELETE FROM ".$table.$conditions.$limit;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Limit string
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @access public
+ * @param string the sql query string
+ * @param integer the number of rows to limit the query to
+ * @param integer the offset value
+ * @return string
+ */
+ function _limit($sql, $limit, $offset)
+ {
+ $limit = $offset + $limit;
+ $newsql = "SELECT * FROM (select inner_query.*, rownum rnum FROM ($sql) inner_query WHERE rownum < $limit)";
+
+ if ($offset != 0)
+ {
+ $newsql .= " WHERE rnum >= $offset";
+ }
+
+ // remember that we used limits
+ $this->limit_used = TRUE;
+
+ return $newsql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Close DB Connection
+ *
+ * @access public
+ * @param resource
+ * @return void
+ */
+ function _close($conn_id)
+ {
+ @ocilogoff($conn_id);
+ }
+
+
+}
+
+
+
+/* End of file oci8_driver.php */
+/* Location: ./system/database/drivers/oci8/oci8_driver.php */
\ No newline at end of file
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