Adding upstream version 2.11.4.upstream/2.11.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1267 insertions, 0 deletions

diff --git a/library/vendor/Zend/Db/Adapter/Abstract.php b/library/vendor/Zend/Db/Adapter/Abstract.php
new file mode 100644
index 0000000..cc00ea1
--- /dev/null
+++ b/library/vendor/Zend/Db/Adapter/Abstract.php
@@ -0,0 +1,1267 @@
+<?php
+/**
+ * Zend Framework
+ *
+ * LICENSE
+ *
+ * This source file is subject to the new BSD license that is bundled
+ * with this package in the file LICENSE.txt.
+ * It is also available through the world-wide-web at this URL:
+ * http://framework.zend.com/license/new-bsd
+ * If you did not receive a copy of the license and are unable to
+ * obtain it through the world-wide-web, please send an email
+ * to license@zend.com so we can send you a copy immediately.
+ *
+ * @category   Zend
+ * @package    Zend_Db
+ * @subpackage Adapter
+ * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ * @version    $Id$
+ */
+
+
+/**
+ * @see Zend_Db
+ */
+
+/**
+ * @see Zend_Db_Select
+ */
+
+/**
+ * Class for connecting to SQL databases and performing common operations.
+ *
+ * @category   Zend
+ * @package    Zend_Db
+ * @subpackage Adapter
+ * @copyright  Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+abstract class Zend_Db_Adapter_Abstract
+{
+
+    /**
+     * User-provided configuration
+     *
+     * @var array
+     */
+    protected $_config = array();
+
+    /**
+     * Fetch mode
+     *
+     * @var integer
+     */
+    protected $_fetchMode = Zend_Db::FETCH_ASSOC;
+
+    /**
+     * Query profiler object, of type Zend_Db_Profiler
+     * or a subclass of that.
+     *
+     * @var Zend_Db_Profiler
+     */
+    protected $_profiler;
+
+    /**
+     * Default class name for a DB statement.
+     *
+     * @var string
+     */
+    protected $_defaultStmtClass = 'Zend_Db_Statement';
+
+    /**
+     * Default class name for the profiler object.
+     *
+     * @var string
+     */
+    protected $_defaultProfilerClass = 'Zend_Db_Profiler';
+
+    /**
+     * Database connection
+     *
+     * @var object|resource|null
+     */
+    protected $_connection = null;
+
+    /**
+     * Specifies the case of column names retrieved in queries
+     * Options
+     * Zend_Db::CASE_NATURAL (default)
+     * Zend_Db::CASE_LOWER
+     * Zend_Db::CASE_UPPER
+     *
+     * @var integer
+     */
+    protected $_caseFolding = Zend_Db::CASE_NATURAL;
+
+    /**
+     * Specifies whether the adapter automatically quotes identifiers.
+     * If true, most SQL generated by Zend_Db classes applies
+     * identifier quoting automatically.
+     * If false, developer must quote identifiers themselves
+     * by calling quoteIdentifier().
+     *
+     * @var bool
+     */
+    protected $_autoQuoteIdentifiers = true;
+
+    /**
+     * Keys are UPPERCASE SQL datatypes or the constants
+     * Zend_Db::INT_TYPE, Zend_Db::BIGINT_TYPE, or Zend_Db::FLOAT_TYPE.
+     *
+     * Values are:
+     * 0 = 32-bit integer
+     * 1 = 64-bit integer
+     * 2 = float or decimal
+     *
+     * @var array Associative array of datatypes to values 0, 1, or 2.
+     */
+    protected $_numericDataTypes = array(
+        Zend_Db::INT_TYPE    => Zend_Db::INT_TYPE,
+        Zend_Db::BIGINT_TYPE => Zend_Db::BIGINT_TYPE,
+        Zend_Db::FLOAT_TYPE  => Zend_Db::FLOAT_TYPE
+    );
+
+    /** Weither or not that object can get serialized
+     *
+     * @var bool
+     */
+    protected $_allowSerialization = true;
+
+    /**
+     * Weither or not the database should be reconnected
+     * to that adapter when waking up
+     *
+     * @var bool
+     */
+    protected $_autoReconnectOnUnserialize = false;
+
+    /**
+     * Constructor.
+     *
+     * $config is an array of key/value pairs or an instance of Zend_Config
+     * containing configuration options.  These options are common to most adapters:
+     *
+     * dbname         => (string) The name of the database to user
+     * username       => (string) Connect to the database as this username.
+     * password       => (string) Password associated with the username.
+     * host           => (string) What host to connect to, defaults to localhost
+     *
+     * Some options are used on a case-by-case basis by adapters:
+     *
+     * port           => (string) The port of the database
+     * persistent     => (boolean) Whether to use a persistent connection or not, defaults to false
+     * protocol       => (string) The network protocol, defaults to TCPIP
+     * caseFolding    => (int) style of case-alteration used for identifiers
+     * socket         => (string) The socket or named pipe that should be used
+     *
+     * @param  array|Zend_Config $config An array or instance of Zend_Config having configuration data
+     * @throws Zend_Db_Adapter_Exception
+     */
+    public function __construct($config)
+    {
+        /*
+         * Verify that adapter parameters are in an array.
+         */
+        if (!is_array($config)) {
+            /*
+             * Convert Zend_Config argument to a plain array.
+             */
+            if ($config instanceof Zend_Config) {
+                $config = $config->toArray();
+            } else {
+                /**
+                 * @see Zend_Db_Adapter_Exception
+                 */
+                throw new Zend_Db_Adapter_Exception('Adapter parameters must be in an array or a Zend_Config object');
+            }
+        }
+
+        $this->_checkRequiredOptions($config);
+
+        $options = array(
+            Zend_Db::CASE_FOLDING           => $this->_caseFolding,
+            Zend_Db::AUTO_QUOTE_IDENTIFIERS => $this->_autoQuoteIdentifiers,
+            Zend_Db::FETCH_MODE             => $this->_fetchMode,
+        );
+        $driverOptions = array();
+
+        /*
+         * normalize the config and merge it with the defaults
+         */
+        if (array_key_exists('options', $config)) {
+            // can't use array_merge() because keys might be integers
+            foreach ((array) $config['options'] as $key => $value) {
+                $options[$key] = $value;
+            }
+        }
+        if (array_key_exists('driver_options', $config)) {
+            if (!empty($config['driver_options'])) {
+                // can't use array_merge() because keys might be integers
+                foreach ((array) $config['driver_options'] as $key => $value) {
+                    $driverOptions[$key] = $value;
+                }
+            }
+        }
+
+        if (!isset($config['charset'])) {
+            $config['charset'] = null;
+        }
+
+        if (!isset($config['persistent'])) {
+            $config['persistent'] = false;
+        }
+
+        $this->_config = array_merge($this->_config, $config);
+        $this->_config['options'] = $options;
+        $this->_config['driver_options'] = $driverOptions;
+
+
+        // obtain the case setting, if there is one
+        if (array_key_exists(Zend_Db::CASE_FOLDING, $options)) {
+            $case = (int) $options[Zend_Db::CASE_FOLDING];
+            switch ($case) {
+                case Zend_Db::CASE_LOWER:
+                case Zend_Db::CASE_UPPER:
+                case Zend_Db::CASE_NATURAL:
+                    $this->_caseFolding = $case;
+                    break;
+                default:
+                    /** @see Zend_Db_Adapter_Exception */
+                    throw new Zend_Db_Adapter_Exception('Case must be one of the following constants: '
+                        . 'Zend_Db::CASE_NATURAL, Zend_Db::CASE_LOWER, Zend_Db::CASE_UPPER');
+            }
+        }
+
+        if (array_key_exists(Zend_Db::FETCH_MODE, $options)) {
+            if (is_string($options[Zend_Db::FETCH_MODE])) {
+                $constant = 'Zend_Db::FETCH_' . strtoupper($options[Zend_Db::FETCH_MODE]);
+                if(defined($constant)) {
+                    $options[Zend_Db::FETCH_MODE] = constant($constant);
+                }
+            }
+            $this->setFetchMode((int) $options[Zend_Db::FETCH_MODE]);
+        }
+
+        // obtain quoting property if there is one
+        if (array_key_exists(Zend_Db::AUTO_QUOTE_IDENTIFIERS, $options)) {
+            $this->_autoQuoteIdentifiers = (bool) $options[Zend_Db::AUTO_QUOTE_IDENTIFIERS];
+        }
+
+        // obtain allow serialization property if there is one
+        if (array_key_exists(Zend_Db::ALLOW_SERIALIZATION, $options)) {
+            $this->_allowSerialization = (bool) $options[Zend_Db::ALLOW_SERIALIZATION];
+        }
+
+        // obtain auto reconnect on unserialize property if there is one
+        if (array_key_exists(Zend_Db::AUTO_RECONNECT_ON_UNSERIALIZE, $options)) {
+            $this->_autoReconnectOnUnserialize = (bool) $options[Zend_Db::AUTO_RECONNECT_ON_UNSERIALIZE];
+        }
+
+        // create a profiler object
+        $profiler = false;
+        if (array_key_exists(Zend_Db::PROFILER, $this->_config)) {
+            $profiler = $this->_config[Zend_Db::PROFILER];
+            unset($this->_config[Zend_Db::PROFILER]);
+        }
+        $this->setProfiler($profiler);
+    }
+
+    /**
+     * Check for config options that are mandatory.
+     * Throw exceptions if any are missing.
+     *
+     * @param array $config
+     * @throws Zend_Db_Adapter_Exception
+     */
+    protected function _checkRequiredOptions(array $config)
+    {
+        // we need at least a dbname
+        if (! array_key_exists('dbname', $config)) {
+            /** @see Zend_Db_Adapter_Exception */
+            throw new Zend_Db_Adapter_Exception("Configuration array must have a key for 'dbname' that names the database instance");
+        }
+
+        if (! array_key_exists('password', $config)) {
+            /**
+             * @see Zend_Db_Adapter_Exception
+             */
+            throw new Zend_Db_Adapter_Exception("Configuration array must have a key for 'password' for login credentials");
+        }
+
+        if (! array_key_exists('username', $config)) {
+            /**
+             * @see Zend_Db_Adapter_Exception
+             */
+            throw new Zend_Db_Adapter_Exception("Configuration array must have a key for 'username' for login credentials");
+        }
+    }
+
+    /**
+     * Returns the underlying database connection object or resource.
+     * If not presently connected, this initiates the connection.
+     *
+     * @return object|resource|null
+     */
+    public function getConnection()
+    {
+        $this->_connect();
+        return $this->_connection;
+    }
+
+    /**
+     * Returns the configuration variables in this adapter.
+     *
+     * @return array
+     */
+    public function getConfig()
+    {
+        return $this->_config;
+    }
+
+    /**
+     * Set the adapter's profiler object.
+     *
+     * The argument may be a boolean, an associative array, an instance of
+     * Zend_Db_Profiler, or an instance of Zend_Config.
+     *
+     * A boolean argument sets the profiler to enabled if true, or disabled if
+     * false.  The profiler class is the adapter's default profiler class,
+     * Zend_Db_Profiler.
+     *
+     * An instance of Zend_Db_Profiler sets the adapter's instance to that
+     * object.  The profiler is enabled and disabled separately.
+     *
+     * An associative array argument may contain any of the keys 'enabled',
+     * 'class', and 'instance'. The 'enabled' and 'instance' keys correspond to the
+     * boolean and object types documented above. The 'class' key is used to name a
+     * class to use for a custom profiler. The class must be Zend_Db_Profiler or a
+     * subclass. The class is instantiated with no constructor arguments. The 'class'
+     * option is ignored when the 'instance' option is supplied.
+     *
+     * An object of type Zend_Config may contain the properties 'enabled', 'class', and
+     * 'instance', just as if an associative array had been passed instead.
+     *
+     * @param  Zend_Db_Profiler|Zend_Config|array|boolean $profiler
+     * @return Zend_Db_Adapter_Abstract Provides a fluent interface
+     * @throws Zend_Db_Profiler_Exception if the object instance or class specified
+     *         is not Zend_Db_Profiler or an extension of that class.
+     */
+    public function setProfiler($profiler)
+    {
+        $enabled          = null;
+        $profilerClass    = $this->_defaultProfilerClass;
+        $profilerInstance = null;
+
+        if ($profilerIsObject = is_object($profiler)) {
+            if ($profiler instanceof Zend_Db_Profiler) {
+                $profilerInstance = $profiler;
+            } else if ($profiler instanceof Zend_Config) {
+                $profiler = $profiler->toArray();
+            } else {
+                /**
+                 * @see Zend_Db_Profiler_Exception
+                 */
+                throw new Zend_Db_Profiler_Exception('Profiler argument must be an instance of either Zend_Db_Profiler'
+                    . ' or Zend_Config when provided as an object');
+            }
+        }
+
+        if (is_array($profiler)) {
+            if (isset($profiler['enabled'])) {
+                $enabled = (bool) $profiler['enabled'];
+            }
+            if (isset($profiler['class'])) {
+                $profilerClass = $profiler['class'];
+            }
+            if (isset($profiler['instance'])) {
+                $profilerInstance = $profiler['instance'];
+            }
+        } else if (!$profilerIsObject) {
+            $enabled = (bool) $profiler;
+        }
+
+        if ($profilerInstance === null) {
+            if (!class_exists($profilerClass)) {
+                Zend_Loader::loadClass($profilerClass);
+            }
+            $profilerInstance = new $profilerClass();
+        }
+
+        if (!$profilerInstance instanceof Zend_Db_Profiler) {
+            /** @see Zend_Db_Profiler_Exception */
+            throw new Zend_Db_Profiler_Exception('Class ' . get_class($profilerInstance) . ' does not extend '
+                . 'Zend_Db_Profiler');
+        }
+
+        if (null !== $enabled) {
+            $profilerInstance->setEnabled($enabled);
+        }
+
+        $this->_profiler = $profilerInstance;
+
+        return $this;
+    }
+
+
+    /**
+     * Returns the profiler for this adapter.
+     *
+     * @return Zend_Db_Profiler
+     */
+    public function getProfiler()
+    {
+        return $this->_profiler;
+    }
+
+    /**
+     * Get the default statement class.
+     *
+     * @return string
+     */
+    public function getStatementClass()
+    {
+        return $this->_defaultStmtClass;
+    }
+
+    /**
+     * Set the default statement class.
+     *
+     * @return Zend_Db_Adapter_Abstract Fluent interface
+     */
+    public function setStatementClass($class)
+    {
+        $this->_defaultStmtClass = $class;
+        return $this;
+    }
+
+    /**
+     * Prepares and executes an SQL statement with bound data.
+     *
+     * @param  mixed  $sql  The SQL statement with placeholders.
+     *                      May be a string or Zend_Db_Select.
+     * @param  mixed  $bind An array of data to bind to the placeholders.
+     * @return Zend_Db_Statement_Interface
+     */
+    public function query($sql, $bind = array())
+    {
+        // connect to the database if needed
+        $this->_connect();
+
+        // is the $sql a Zend_Db_Select object?
+        if ($sql instanceof Zend_Db_Select) {
+            if (empty($bind)) {
+                $bind = $sql->getBind();
+            }
+
+            $sql = $sql->assemble();
+        }
+
+        // make sure $bind to an array;
+        // don't use (array) typecasting because
+        // because $bind may be a Zend_Db_Expr object
+        if (!is_array($bind)) {
+            $bind = array($bind);
+        }
+
+        // prepare and execute the statement with profiling
+        $stmt = $this->prepare($sql);
+        $stmt->execute($bind);
+
+        // return the results embedded in the prepared statement object
+        $stmt->setFetchMode($this->_fetchMode);
+        return $stmt;
+    }
+
+    /**
+     * Leave autocommit mode and begin a transaction.
+     *
+     * @return Zend_Db_Adapter_Abstract
+     */
+    public function beginTransaction()
+    {
+        $this->_connect();
+        $q = $this->_profiler->queryStart('begin', Zend_Db_Profiler::TRANSACTION);
+        $this->_beginTransaction();
+        $this->_profiler->queryEnd($q);
+        return $this;
+    }
+
+    /**
+     * Commit a transaction and return to autocommit mode.
+     *
+     * @return Zend_Db_Adapter_Abstract
+     */
+    public function commit()
+    {
+        $this->_connect();
+        $q = $this->_profiler->queryStart('commit', Zend_Db_Profiler::TRANSACTION);
+        $this->_commit();
+        $this->_profiler->queryEnd($q);
+        return $this;
+    }
+
+    /**
+     * Roll back a transaction and return to autocommit mode.
+     *
+     * @return Zend_Db_Adapter_Abstract
+     */
+    public function rollBack()
+    {
+        $this->_connect();
+        $q = $this->_profiler->queryStart('rollback', Zend_Db_Profiler::TRANSACTION);
+        $this->_rollBack();
+        $this->_profiler->queryEnd($q);
+        return $this;
+    }
+
+    /**
+     * Inserts a table row with specified data.
+     *
+     * @param mixed $table The table to insert data into.
+     * @param array $bind Column-value pairs.
+     * @return int The number of affected rows.
+     * @throws Zend_Db_Adapter_Exception
+     */
+    public function insert($table, array $bind)
+    {
+        // extract and quote col names from the array keys
+        $cols = array();
+        $vals = array();
+        $i = 0;
+        foreach ($bind as $col => $val) {
+            $cols[] = $this->quoteIdentifier($col, true);
+            if ($val instanceof Zend_Db_Expr) {
+                $vals[] = $val->__toString();
+                unset($bind[$col]);
+            } else {
+                if ($this->supportsParameters('positional')) {
+                    $vals[] = '?';
+                } else {
+                    if ($this->supportsParameters('named')) {
+                        unset($bind[$col]);
+                        $bind[':col'.$i] = $val;
+                        $vals[] = ':col'.$i;
+                        $i++;
+                    } else {
+                        /** @see Zend_Db_Adapter_Exception */
+                        throw new Zend_Db_Adapter_Exception(get_class($this) ." doesn't support positional or named binding");
+                    }
+                }
+            }
+        }
+
+        // build the statement
+        $sql = "INSERT INTO "
+             . $this->quoteIdentifier($table, true)
+             . ' (' . implode(', ', $cols) . ') '
+             . 'VALUES (' . implode(', ', $vals) . ')';
+
+        // execute the statement and return the number of affected rows
+        if ($this->supportsParameters('positional')) {
+            $bind = array_values($bind);
+        }
+        $stmt = $this->query($sql, $bind);
+        $result = $stmt->rowCount();
+        return $result;
+    }
+
+    /**
+     * Updates table rows with specified data based on a WHERE clause.
+     *
+     * @param  mixed        $table The table to update.
+     * @param  array        $bind  Column-value pairs.
+     * @param  mixed        $where UPDATE WHERE clause(s).
+     * @return int          The number of affected rows.
+     * @throws Zend_Db_Adapter_Exception
+     */
+    public function update($table, array $bind, $where = '')
+    {
+        /**
+         * Build "col = ?" pairs for the statement,
+         * except for Zend_Db_Expr which is treated literally.
+         */
+        $set = array();
+        $i = 0;
+        foreach ($bind as $col => $val) {
+            if ($val instanceof Zend_Db_Expr) {
+                $val = $val->__toString();
+                unset($bind[$col]);
+            } else {
+                if ($this->supportsParameters('positional')) {
+                    $val = '?';
+                } else {
+                    if ($this->supportsParameters('named')) {
+                        unset($bind[$col]);
+                        $bind[':col'.$i] = $val;
+                        $val = ':col'.$i;
+                        $i++;
+                    } else {
+                        /** @see Zend_Db_Adapter_Exception */
+                        throw new Zend_Db_Adapter_Exception(get_class($this) ." doesn't support positional or named binding");
+                    }
+                }
+            }
+            $set[] = $this->quoteIdentifier($col, true) . ' = ' . $val;
+        }
+
+        $where = $this->_whereExpr($where);
+
+        /**
+         * Build the UPDATE statement
+         */
+        $sql = "UPDATE "
+             . $this->quoteIdentifier($table, true)
+             . ' SET ' . implode(', ', $set)
+             . (($where) ? " WHERE $where" : '');
+
+        /**
+         * Execute the statement and return the number of affected rows
+         */
+        if ($this->supportsParameters('positional')) {
+            $stmt = $this->query($sql, array_values($bind));
+        } else {
+            $stmt = $this->query($sql, $bind);
+        }
+        $result = $stmt->rowCount();
+        return $result;
+    }
+
+    /**
+     * Deletes table rows based on a WHERE clause.
+     *
+     * @param  mixed        $table The table to update.
+     * @param  mixed        $where DELETE WHERE clause(s).
+     * @return int          The number of affected rows.
+     */
+    public function delete($table, $where = '')
+    {
+        $where = $this->_whereExpr($where);
+
+        /**
+         * Build the DELETE statement
+         */
+        $sql = "DELETE FROM "
+             . $this->quoteIdentifier($table, true)
+             . (($where) ? " WHERE $where" : '');
+
+        /**
+         * Execute the statement and return the number of affected rows
+         */
+        $stmt = $this->query($sql);
+        $result = $stmt->rowCount();
+        return $result;
+    }
+
+    /**
+     * Convert an array, string, or Zend_Db_Expr object
+     * into a string to put in a WHERE clause.
+     *
+     * @param mixed $where
+     * @return string
+     */
+    protected function _whereExpr($where)
+    {
+        if (empty($where)) {
+            return $where;
+        }
+        if (!is_array($where)) {
+            $where = array($where);
+        }
+        foreach ($where as $cond => &$term) {
+            // is $cond an int? (i.e. Not a condition)
+            if (is_int($cond)) {
+                // $term is the full condition
+                if ($term instanceof Zend_Db_Expr) {
+                    $term = $term->__toString();
+                }
+            } else {
+                // $cond is the condition with placeholder,
+                // and $term is quoted into the condition
+                $term = $this->quoteInto($cond, $term);
+            }
+            $term = '(' . $term . ')';
+        }
+
+        $where = implode(' AND ', $where);
+        return $where;
+    }
+
+    /**
+     * Creates and returns a new Zend_Db_Select object for this adapter.
+     *
+     * @return Zend_Db_Select
+     */
+    public function select()
+    {
+        return new Zend_Db_Select($this);
+    }
+
+    /**
+     * Get the fetch mode.
+     *
+     * @return int
+     */
+    public function getFetchMode()
+    {
+        return $this->_fetchMode;
+    }
+
+    /**
+     * Fetches all SQL result rows as a sequential array.
+     * Uses the current fetchMode for the adapter.
+     *
+     * @param string|Zend_Db_Select $sql  An SQL SELECT statement.
+     * @param mixed                 $bind Data to bind into SELECT placeholders.
+     * @param mixed                 $fetchMode Override current fetch mode.
+     * @return array
+     */
+    public function fetchAll($sql, $bind = array(), $fetchMode = null)
+    {
+        if ($fetchMode === null) {
+            $fetchMode = $this->_fetchMode;
+        }
+        $stmt = $this->query($sql, $bind);
+        $result = $stmt->fetchAll($fetchMode);
+        return $result;
+    }
+
+    /**
+     * Fetches the first row of the SQL result.
+     * Uses the current fetchMode for the adapter.
+     *
+     * @param string|Zend_Db_Select $sql An SQL SELECT statement.
+     * @param mixed $bind Data to bind into SELECT placeholders.
+     * @param mixed                 $fetchMode Override current fetch mode.
+     * @return mixed Array, object, or scalar depending on fetch mode.
+     */
+    public function fetchRow($sql, $bind = array(), $fetchMode = null)
+    {
+        if ($fetchMode === null) {
+            $fetchMode = $this->_fetchMode;
+        }
+        $stmt = $this->query($sql, $bind);
+        $result = $stmt->fetch($fetchMode);
+        return $result;
+    }
+
+    /**
+     * Fetches all SQL result rows as an associative array.
+     *
+     * The first column is the key, the entire row array is the
+     * value.  You should construct the query to be sure that
+     * the first column contains unique values, or else
+     * rows with duplicate values in the first column will
+     * overwrite previous data.
+     *
+     * @param string|Zend_Db_Select $sql An SQL SELECT statement.
+     * @param mixed $bind Data to bind into SELECT placeholders.
+     * @return array
+     */
+    public function fetchAssoc($sql, $bind = array())
+    {
+        $stmt = $this->query($sql, $bind);
+        $data = array();
+        while ($row = $stmt->fetch(Zend_Db::FETCH_ASSOC)) {
+            $tmp = array_values(array_slice($row, 0, 1));
+            $data[$tmp[0]] = $row;
+        }
+        return $data;
+    }
+
+    /**
+     * Fetches the first column of all SQL result rows as an array.
+     *
+     * @param string|Zend_Db_Select $sql An SQL SELECT statement.
+     * @param mixed $bind Data to bind into SELECT placeholders.
+     * @return array
+     */
+    public function fetchCol($sql, $bind = array())
+    {
+        $stmt = $this->query($sql, $bind);
+        $result = $stmt->fetchAll(Zend_Db::FETCH_COLUMN, 0);
+        return $result;
+    }
+
+    /**
+     * Fetches all SQL result rows as an array of key-value pairs.
+     *
+     * The first column is the key, the second column is the
+     * value.
+     *
+     * @param string|Zend_Db_Select $sql An SQL SELECT statement.
+     * @param mixed $bind Data to bind into SELECT placeholders.
+     * @return array
+     */
+    public function fetchPairs($sql, $bind = array())
+    {
+        $stmt = $this->query($sql, $bind);
+        $data = array();
+        while ($row = $stmt->fetch(Zend_Db::FETCH_NUM)) {
+            $data[$row[0]] = $row[1];
+        }
+        return $data;
+    }
+
+    /**
+     * Fetches the first column of the first row of the SQL result.
+     *
+     * @param string|Zend_Db_Select $sql An SQL SELECT statement.
+     * @param mixed $bind Data to bind into SELECT placeholders.
+     * @return string
+     */
+    public function fetchOne($sql, $bind = array())
+    {
+        $stmt = $this->query($sql, $bind);
+        $result = $stmt->fetchColumn(0);
+        return $result;
+    }
+
+    /**
+     * Quote a raw string.
+     *
+     * @param string $value     Raw string
+     * @return string           Quoted string
+     */
+    protected function _quote($value)
+    {
+        if (is_int($value)) {
+            return $value;
+        } elseif (is_float($value)) {
+            return sprintf('%F', $value);
+        }
+        return "'" . addcslashes($value, "\000\n\r\\'\"\032") . "'";
+    }
+
+    /**
+     * Safely quotes a value for an SQL statement.
+     *
+     * If an array is passed as the value, the array values are quoted
+     * and then returned as a comma-separated string.
+     *
+     * @param mixed $value The value to quote.
+     * @param mixed $type  OPTIONAL the SQL datatype name, or constant, or null.
+     * @return mixed An SQL-safe quoted value (or string of separated values).
+     */
+    public function quote($value, $type = null)
+    {
+        $this->_connect();
+
+        if ($value instanceof Zend_Db_Select) {
+            return '(' . $value->assemble() . ')';
+        }
+
+        if ($value instanceof Zend_Db_Expr) {
+            return $value->__toString();
+        }
+
+        if (is_array($value)) {
+            foreach ($value as &$val) {
+                $val = $this->quote($val, $type);
+            }
+            return implode(', ', $value);
+        }
+
+        if ($type !== null && array_key_exists($type = strtoupper($type), $this->_numericDataTypes)) {
+            $quotedValue = '0';
+            switch ($this->_numericDataTypes[$type]) {
+                case Zend_Db::INT_TYPE: // 32-bit integer
+                    $quotedValue = (string) intval($value);
+                    break;
+                case Zend_Db::BIGINT_TYPE: // 64-bit integer
+                    // ANSI SQL-style hex literals (e.g. x'[\dA-F]+')
+                    // are not supported here, because these are string
+                    // literals, not numeric literals.
+                    if (preg_match('/^(
+                          [+-]?                  # optional sign
+                          (?:
+                            0[Xx][\da-fA-F]+     # ODBC-style hexadecimal
+                            |\d+                 # decimal or octal, or MySQL ZEROFILL decimal
+                            (?:[eE][+-]?\d+)?    # optional exponent on decimals or octals
+                          )
+                        )/x',
+                        (string) $value, $matches)) {
+                        $quotedValue = $matches[1];
+                    }
+                    break;
+                case Zend_Db::FLOAT_TYPE: // float or decimal
+                    $quotedValue = sprintf('%F', $value);
+            }
+            return $quotedValue;
+        }
+
+        return $this->_quote($value);
+    }
+
+    /**
+     * Quotes a value and places into a piece of text at a placeholder.
+     *
+     * The placeholder is a question-mark; all placeholders will be replaced
+     * with the quoted value.   For example:
+     *
+     * <code>
+     * $text = "WHERE date < ?";
+     * $date = "2005-01-02";
+     * $safe = $sql->quoteInto($text, $date);
+     * // $safe = "WHERE date < '2005-01-02'"
+     * </code>
+     *
+     * @param string  $text  The text with a placeholder.
+     * @param mixed   $value The value to quote.
+     * @param string  $type  OPTIONAL SQL datatype
+     * @param integer $count OPTIONAL count of placeholders to replace
+     * @return string An SQL-safe quoted value placed into the original text.
+     */
+    public function quoteInto($text, $value, $type = null, $count = null)
+    {
+        if ($count === null) {
+            return str_replace('?', $this->quote($value, $type), $text);
+        } else {
+            return implode($this->quote($value, $type), explode('?', $text, $count + 1));
+        }
+    }
+
+    /**
+     * Quotes an identifier.
+     *
+     * Accepts a string representing a qualified indentifier. For Example:
+     * <code>
+     * $adapter->quoteIdentifier('myschema.mytable')
+     * </code>
+     * Returns: "myschema"."mytable"
+     *
+     * Or, an array of one or more identifiers that may form a qualified identifier:
+     * <code>
+     * $adapter->quoteIdentifier(array('myschema','my.table'))
+     * </code>
+     * Returns: "myschema"."my.table"
+     *
+     * The actual quote character surrounding the identifiers may vary depending on
+     * the adapter.
+     *
+     * @param string|array|Zend_Db_Expr $ident The identifier.
+     * @param boolean $auto If true, heed the AUTO_QUOTE_IDENTIFIERS config option.
+     * @return string The quoted identifier.
+     */
+    public function quoteIdentifier($ident, $auto=false)
+    {
+        return $this->_quoteIdentifierAs($ident, null, $auto);
+    }
+
+    /**
+     * Quote a column identifier and alias.
+     *
+     * @param string|array|Zend_Db_Expr $ident The identifier or expression.
+     * @param string $alias An alias for the column.
+     * @param boolean $auto If true, heed the AUTO_QUOTE_IDENTIFIERS config option.
+     * @return string The quoted identifier and alias.
+     */
+    public function quoteColumnAs($ident, $alias, $auto=false)
+    {
+        return $this->_quoteIdentifierAs($ident, $alias, $auto);
+    }
+
+    /**
+     * Quote a table identifier and alias.
+     *
+     * @param string|array|Zend_Db_Expr $ident The identifier or expression.
+     * @param string $alias An alias for the table.
+     * @param boolean $auto If true, heed the AUTO_QUOTE_IDENTIFIERS config option.
+     * @return string The quoted identifier and alias.
+     */
+    public function quoteTableAs($ident, $alias = null, $auto = false)
+    {
+        return $this->_quoteIdentifierAs($ident, $alias, $auto);
+    }
+
+    /**
+     * Quote an identifier and an optional alias.
+     *
+     * @param string|array|Zend_Db_Expr $ident The identifier or expression.
+     * @param string $alias An optional alias.
+     * @param boolean $auto If true, heed the AUTO_QUOTE_IDENTIFIERS config option.
+     * @param string $as The string to add between the identifier/expression and the alias.
+     * @return string The quoted identifier and alias.
+     */
+    protected function _quoteIdentifierAs($ident, $alias = null, $auto = false, $as = ' AS ')
+    {
+        if ($ident instanceof Zend_Db_Expr) {
+            $quoted = $ident->__toString();
+        } elseif ($ident instanceof Zend_Db_Select) {
+            $quoted = '(' . $ident->assemble() . ')';
+        } else {
+            if (is_string($ident)) {
+                $ident = explode('.', $ident);
+            }
+            if (is_array($ident)) {
+                $segments = array();
+                foreach ($ident as $segment) {
+                    if ($segment instanceof Zend_Db_Expr) {
+                        $segments[] = $segment->__toString();
+                    } else {
+                        $segments[] = $this->_quoteIdentifier($segment, $auto);
+                    }
+                }
+                if ($alias !== null && end($ident) == $alias) {
+                    $alias = null;
+                }
+                $quoted = implode('.', $segments);
+            } else {
+                $quoted = $this->_quoteIdentifier($ident, $auto);
+            }
+        }
+        if ($alias !== null) {
+            $quoted .= $as . $this->_quoteIdentifier($alias, $auto);
+        }
+        return $quoted;
+    }
+
+    /**
+     * Quote an identifier.
+     *
+     * @param  string $value The identifier or expression.
+     * @param boolean $auto If true, heed the AUTO_QUOTE_IDENTIFIERS config option.
+     * @return string        The quoted identifier and alias.
+     */
+    protected function _quoteIdentifier($value, $auto=false)
+    {
+        if ($auto === false || $this->_autoQuoteIdentifiers === true) {
+            $q = $this->getQuoteIdentifierSymbol();
+            return ($q . str_replace("$q", "$q$q", $value) . $q);
+        }
+        return $value;
+    }
+
+    /**
+     * Returns the symbol the adapter uses for delimited identifiers.
+     *
+     * @return string
+     */
+    public function getQuoteIdentifierSymbol()
+    {
+        return '"';
+    }
+
+    /**
+     * Return the most recent value from the specified sequence in the database.
+     * This is supported only on RDBMS brands that support sequences
+     * (e.g. Oracle, PostgreSQL, DB2).  Other RDBMS brands return null.
+     *
+     * @param string $sequenceName
+     * @return string
+     */
+    public function lastSequenceId($sequenceName)
+    {
+        return null;
+    }
+
+    /**
+     * Generate a new value from the specified sequence in the database, and return it.
+     * This is supported only on RDBMS brands that support sequences
+     * (e.g. Oracle, PostgreSQL, DB2).  Other RDBMS brands return null.
+     *
+     * @param string $sequenceName
+     * @return string
+     */
+    public function nextSequenceId($sequenceName)
+    {
+        return null;
+    }
+
+    /**
+     * Helper method to change the case of the strings used
+     * when returning result sets in FETCH_ASSOC and FETCH_BOTH
+     * modes.
+     *
+     * This is not intended to be used by application code,
+     * but the method must be public so the Statement class
+     * can invoke it.
+     *
+     * @param string $key
+     * @return string
+     */
+    public function foldCase($key)
+    {
+        switch ($this->_caseFolding) {
+            case Zend_Db::CASE_LOWER:
+                $value = strtolower((string) $key);
+                break;
+            case Zend_Db::CASE_UPPER:
+                $value = strtoupper((string) $key);
+                break;
+            case Zend_Db::CASE_NATURAL:
+            default:
+                $value = (string) $key;
+        }
+        return $value;
+    }
+
+    /**
+     * called when object is getting serialized
+     * This disconnects the DB object that cant be serialized
+     *
+     * @throws Zend_Db_Adapter_Exception
+     * @return array
+     */
+    public function __sleep()
+    {
+        if ($this->_allowSerialization == false) {
+            /** @see Zend_Db_Adapter_Exception */
+            throw new Zend_Db_Adapter_Exception(
+                get_class($this) . ' is not allowed to be serialized'
+            );
+        }
+        $this->_connection = null;
+
+        return array_keys(
+            array_diff_key(get_object_vars($this), array('_connection' => null))
+        );
+    }
+
+    /**
+     * called when object is getting unserialized
+     *
+     * @return void
+     */
+    public function __wakeup()
+    {
+        if ($this->_autoReconnectOnUnserialize == true) {
+            $this->getConnection();
+        }
+    }
+
+    /**
+     * Abstract Methods
+     */
+
+    /**
+     * Returns a list of the tables in the database.
+     *
+     * @return array
+     */
+    abstract public function listTables();
+
+    /**
+     * Returns the column descriptions for a table.
+     *
+     * The return value is an associative array keyed by the column name,
+     * as returned by the RDBMS.
+     *
+     * The value of each array element is an associative array
+     * with the following keys:
+     *
+     * SCHEMA_NAME => string; name of database or schema
+     * TABLE_NAME  => string;
+     * COLUMN_NAME => string; column name
+     * COLUMN_POSITION => number; ordinal position of column in table
+     * DATA_TYPE   => string; SQL datatype name of column
+     * DEFAULT     => string; default expression of column, null if none
+     * NULLABLE    => boolean; true if column can have nulls
+     * LENGTH      => number; length of CHAR/VARCHAR
+     * SCALE       => number; scale of NUMERIC/DECIMAL
+     * PRECISION   => number; precision of NUMERIC/DECIMAL
+     * UNSIGNED    => boolean; unsigned property of an integer type
+     * PRIMARY     => boolean; true if column is part of the primary key
+     * PRIMARY_POSITION => integer; position of column in primary key
+     *
+     * @param string $tableName
+     * @param string $schemaName OPTIONAL
+     * @return array
+     */
+    abstract public function describeTable($tableName, $schemaName = null);
+
+    /**
+     * Creates a connection to the database.
+     *
+     * @return void
+     */
+    abstract protected function _connect();
+
+    /**
+     * Test if a connection is active
+     *
+     * @return boolean
+     */
+    abstract public function isConnected();
+
+    /**
+     * Force the connection to close.
+     *
+     * @return void
+     */
+    abstract public function closeConnection();
+
+    /**
+     * Prepare a statement and return a PDOStatement-like object.
+     *
+     * @param string|Zend_Db_Select $sql SQL query
+     * @return Zend_Db_Statement|PDOStatement
+     */
+    abstract public function prepare($sql);
+
+    /**
+     * Gets the last ID generated automatically by an IDENTITY/AUTOINCREMENT column.
+     *
+     * As a convention, on RDBMS brands that support sequences
+     * (e.g. Oracle, PostgreSQL, DB2), this method forms the name of a sequence
+     * from the arguments and returns the last id generated by that sequence.
+     * On RDBMS brands that support IDENTITY/AUTOINCREMENT columns, this method
+     * returns the last value generated for such a column, and the table name
+     * argument is disregarded.
+     *
+     * @param string $tableName   OPTIONAL Name of table.
+     * @param string $primaryKey  OPTIONAL Name of primary key column.
+     * @return string
+     */
+    abstract public function lastInsertId($tableName = null, $primaryKey = null);
+
+    /**
+     * Begin a transaction.
+     */
+    abstract protected function _beginTransaction();
+
+    /**
+     * Commit a transaction.
+     */
+    abstract protected function _commit();
+
+    /**
+     * Roll-back a transaction.
+     */
+    abstract protected function _rollBack();
+
+    /**
+     * Set the fetch mode.
+     *
+     * @param integer $mode
+     * @return void
+     * @throws Zend_Db_Adapter_Exception
+     */
+    abstract public function setFetchMode($mode);
+
+    /**
+     * Adds an adapter-specific LIMIT clause to the SELECT statement.
+     *
+     * @param mixed $sql
+     * @param integer $count
+     * @param integer $offset
+     * @return string
+     */
+    abstract public function limit($sql, $count, $offset = 0);
+
+    /**
+     * Check if the adapter supports real SQL parameters.
+     *
+     * @param string $type 'positional' or 'named'
+     * @return bool
+     */
+    abstract public function supportsParameters($type);
+
+    /**
+     * Retrieve server version in PHP style
+     *
+     * @return string
+     */
+    abstract public function getServerVersion();
+}