Mini Shell
<?php
/**
* MS SQL Server layer for DBO
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* For full copyright and license information, please see the LICENSE.txt
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.Model.Datasource.Database
* @since CakePHP(tm) v 0.10.5.1790
* @license http://www.opensource.org/licenses/mit-license.php MIT License
*/
App::uses('DboSource', 'Model/Datasource');
/**
* Dbo layer for Microsoft's official SQLServer driver
*
* A Dbo layer for MS SQL Server 2005 and higher. Requires the
* `pdo_sqlsrv` extension to be enabled.
*
* @link http://www.php.net/manual/en/ref.pdo-sqlsrv.php
*
* @package Cake.Model.Datasource.Database
*/
class Sqlserver extends DboSource {
/**
* Driver description
*
* @var string
*/
public $description = "SQL Server DBO Driver";
/**
* Starting quote character for quoted identifiers
*
* @var string
*/
public $startQuote = "[";
/**
* Ending quote character for quoted identifiers
*
* @var string
*/
public $endQuote = "]";
/**
* Creates a map between field aliases and numeric indexes. Workaround for the
* SQL Server driver's 30-character column name limitation.
*
* @var array
*/
protected $_fieldMappings = array();
/**
* Storing the last affected value
*
* @var mixed
*/
protected $_lastAffected = false;
/**
* Base configuration settings for MS SQL driver
*
* @var array
*/
protected $_baseConfig = array(
'persistent' => true,
'host' => 'localhost\SQLEXPRESS',
'login' => '',
'password' => '',
'database' => 'cake',
'schema' => '',
'flags' => array()
);
/**
* MS SQL column definition
*
* @var array
*/
public $columns = array(
'primary_key' => array('name' => 'IDENTITY (1, 1) NOT NULL'),
'string' => array('name' => 'nvarchar', 'limit' => '255'),
'text' => array('name' => 'nvarchar', 'limit' => 'MAX'),
'integer' => array('name' => 'int', 'formatter' => 'intval'),
'biginteger' => array('name' => 'bigint'),
'numeric' => array('name' => 'decimal', 'formatter' => 'floatval'),
'decimal' => array('name' => 'decimal', 'formatter' => 'floatval'),
'float' => array('name' => 'float', 'formatter' => 'floatval'),
'real' => array('name' => 'float', 'formatter' => 'floatval'),
'datetime' => array('name' => 'datetime', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
'timestamp' => array('name' => 'timestamp', 'format' => 'Y-m-d H:i:s', 'formatter' => 'date'),
'time' => array('name' => 'datetime', 'format' => 'H:i:s', 'formatter' => 'date'),
'date' => array('name' => 'datetime', 'format' => 'Y-m-d', 'formatter' => 'date'),
'binary' => array('name' => 'varbinary'),
'boolean' => array('name' => 'bit')
);
/**
* Magic column name used to provide pagination support for SQLServer 2008
* which lacks proper limit/offset support.
*
* @var string
*/
const ROW_COUNTER = '_cake_page_rownum_';
/**
* Connects to the database using options in the given configuration array.
*
* @return bool True if the database could be connected, else false
* @throws MissingConnectionException
*/
public function connect() {
$config = $this->config;
$this->connected = false;
$flags = $config['flags'] + array(
PDO::ATTR_PERSISTENT => $config['persistent'],
PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION
);
if (!empty($config['encoding'])) {
$flags[PDO::SQLSRV_ATTR_ENCODING] = $config['encoding'];
}
try {
$this->_connection = new PDO(
"sqlsrv:server={$config['host']};Database={$config['database']}",
$config['login'],
$config['password'],
$flags
);
$this->connected = true;
if (!empty($config['settings'])) {
foreach ($config['settings'] as $key => $value) {
$this->_execute("SET $key $value");
}
}
} catch (PDOException $e) {
throw new MissingConnectionException(array(
'class' => get_class($this),
'message' => $e->getMessage()
));
}
return $this->connected;
}
/**
* Check that PDO SQL Server is installed/loaded
*
* @return bool
*/
public function enabled() {
return in_array('sqlsrv', PDO::getAvailableDrivers());
}
/**
* Returns an array of sources (tables) in the database.
*
* @param mixed $data The names
* @return array Array of table names in the database
*/
public function listSources($data = null) {
$cache = parent::listSources();
if ($cache !== null) {
return $cache;
}
$result = $this->_execute("SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES");
if (!$result) {
$result->closeCursor();
return array();
}
$tables = array();
while ($line = $result->fetch(PDO::FETCH_NUM)) {
$tables[] = $line[0];
}
$result->closeCursor();
parent::listSources($tables);
return $tables;
}
/**
* Returns an array of the fields in given table name.
*
* @param Model|string $model Model object to describe, or a string table name.
* @return array Fields in table. Keys are name and type
* @throws CakeException
*/
public function describe($model) {
$table = $this->fullTableName($model, false, false);
$fulltable = $this->fullTableName($model, false, true);
$cache = parent::describe($fulltable);
if ($cache) {
return $cache;
}
$fields = array();
$schema = is_object($model) ? $model->schemaName : false;
$cols = $this->_execute(
"SELECT
COLUMN_NAME as Field,
DATA_TYPE as Type,
COL_LENGTH('" . ($schema ? $fulltable : $table) . "', COLUMN_NAME) as Length,
IS_NULLABLE As [Null],
COLUMN_DEFAULT as [Default],
COLUMNPROPERTY(OBJECT_ID('" . ($schema ? $fulltable : $table) . "'), COLUMN_NAME, 'IsIdentity') as [Key],
NUMERIC_SCALE as Size
FROM INFORMATION_SCHEMA.COLUMNS
WHERE TABLE_NAME = '" . $table . "'" . ($schema ? " AND TABLE_SCHEMA = '" . $schema . "'" : '')
);
if (!$cols) {
throw new CakeException(__d('cake_dev', 'Could not describe table for %s', $table));
}
while ($column = $cols->fetch(PDO::FETCH_OBJ)) {
$field = $column->Field;
$fields[$field] = array(
'type' => $this->column($column),
'null' => ($column->Null === 'YES' ? true : false),
'default' => $column->Default,
'length' => $this->length($column),
'key' => ($column->Key == '1') ? 'primary' : false
);
if ($fields[$field]['default'] === 'null') {
$fields[$field]['default'] = null;
}
if ($fields[$field]['default'] !== null) {
$fields[$field]['default'] = preg_replace(
"/^[(]{1,2}'?([^')]*)?'?[)]{1,2}$/",
"$1",
$fields[$field]['default']
);
$this->value($fields[$field]['default'], $fields[$field]['type']);
}
if ($fields[$field]['key'] !== false && $fields[$field]['type'] === 'integer') {
$fields[$field]['length'] = 11;
} elseif ($fields[$field]['key'] === false) {
unset($fields[$field]['key']);
}
if (in_array($fields[$field]['type'], array('date', 'time', 'datetime', 'timestamp'))) {
$fields[$field]['length'] = null;
}
if ($fields[$field]['type'] === 'float' && !empty($column->Size)) {
$fields[$field]['length'] = $fields[$field]['length'] . ',' . $column->Size;
}
}
$this->_cacheDescription($table, $fields);
$cols->closeCursor();
return $fields;
}
/**
* Generates the fields list of an SQL query.
*
* @param Model $model The model to get fields for.
* @param string $alias Alias table name
* @param array $fields The fields so far.
* @param bool $quote Whether or not to quote identfiers.
* @return array
*/
public function fields(Model $model, $alias = null, $fields = array(), $quote = true) {
if (empty($alias)) {
$alias = $model->alias;
}
$fields = parent::fields($model, $alias, $fields, false);
$count = count($fields);
if ($count >= 1 && strpos($fields[0], 'COUNT(*)') === false) {
$result = array();
for ($i = 0; $i < $count; $i++) {
$prepend = '';
if (strpos($fields[$i], 'DISTINCT') !== false && strpos($fields[$i], 'COUNT') === false) {
$prepend = 'DISTINCT ';
$fields[$i] = trim(str_replace('DISTINCT', '', $fields[$i]));
}
if (!preg_match('/\s+AS\s+/i', $fields[$i])) {
if (substr($fields[$i], -1) === '*') {
if (strpos($fields[$i], '.') !== false && $fields[$i] != $alias . '.*') {
$build = explode('.', $fields[$i]);
$AssociatedModel = $model->{$build[0]};
} else {
$AssociatedModel = $model;
}
$_fields = $this->fields($AssociatedModel, $AssociatedModel->alias, array_keys($AssociatedModel->schema()));
$result = array_merge($result, $_fields);
continue;
}
if (strpos($fields[$i], '.') === false) {
$this->_fieldMappings[$alias . '__' . $fields[$i]] = $alias . '.' . $fields[$i];
$fieldName = $this->name($alias . '.' . $fields[$i]);
$fieldAlias = $this->name($alias . '__' . $fields[$i]);
} else {
$build = explode('.', $fields[$i]);
$build[0] = trim($build[0], '[]');
$build[1] = trim($build[1], '[]');
$name = $build[0] . '.' . $build[1];
$alias = $build[0] . '__' . $build[1];
$this->_fieldMappings[$alias] = $name;
$fieldName = $this->name($name);
$fieldAlias = $this->name($alias);
}
if ($model->getColumnType($fields[$i]) === 'datetime') {
$fieldName = "CONVERT(VARCHAR(20), {$fieldName}, 20)";
}
$fields[$i] = "{$fieldName} AS {$fieldAlias}";
}
$result[] = $prepend . $fields[$i];
}
return $result;
}
return $fields;
}
/**
* Generates and executes an SQL INSERT statement for given model, fields, and values.
* Removes Identity (primary key) column from update data before returning to parent, if
* value is empty.
*
* @param Model $model The model to insert into.
* @param array $fields The fields to set.
* @param array $values The values to set.
* @return array
*/
public function create(Model $model, $fields = null, $values = null) {
if (!empty($values)) {
$fields = array_combine($fields, $values);
}
$primaryKey = $this->_getPrimaryKey($model);
if (array_key_exists($primaryKey, $fields)) {
if (empty($fields[$primaryKey])) {
unset($fields[$primaryKey]);
} else {
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($model) . ' ON');
}
}
$result = parent::create($model, array_keys($fields), array_values($fields));
if (array_key_exists($primaryKey, $fields) && !empty($fields[$primaryKey])) {
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($model) . ' OFF');
}
return $result;
}
/**
* Generates and executes an SQL UPDATE statement for given model, fields, and values.
* Removes Identity (primary key) column from update data before returning to parent.
*
* @param Model $model The model to update.
* @param array $fields The fields to set.
* @param array $values The values to set.
* @param mixed $conditions The conditions to use.
* @return array
*/
public function update(Model $model, $fields = array(), $values = null, $conditions = null) {
if (!empty($values)) {
$fields = array_combine($fields, $values);
}
if (isset($fields[$model->primaryKey])) {
unset($fields[$model->primaryKey]);
}
if (empty($fields)) {
return true;
}
return parent::update($model, array_keys($fields), array_values($fields), $conditions);
}
/**
* Returns a limit statement in the correct format for the particular database.
*
* @param int $limit Limit of results returned
* @param int $offset Offset from which to start results
* @return string SQL limit/offset statement
*/
public function limit($limit, $offset = null) {
if ($limit) {
$rt = '';
if (!strpos(strtolower($limit), 'top') || strpos(strtolower($limit), 'top') === 0) {
$rt = ' TOP';
}
$rt .= sprintf(' %u', $limit);
if (is_int($offset) && $offset > 0) {
$rt = sprintf(' OFFSET %u ROWS FETCH FIRST %u ROWS ONLY', $offset, $limit);
}
return $rt;
}
return null;
}
/**
* Converts database-layer column types to basic types
*
* @param mixed $real Either the string value of the fields type.
* or the Result object from Sqlserver::describe()
* @return string Abstract column type (i.e. "string")
*/
public function column($real) {
$limit = null;
$col = $real;
if (is_object($real) && isset($real->Field)) {
$limit = $real->Length;
$col = $real->Type;
}
if ($col === 'datetime2') {
return 'datetime';
}
if (in_array($col, array('date', 'time', 'datetime', 'timestamp'))) {
return $col;
}
if ($col === 'bit') {
return 'boolean';
}
if (strpos($col, 'bigint') !== false) {
return 'biginteger';
}
if (strpos($col, 'int') !== false) {
return 'integer';
}
if (strpos($col, 'char') !== false && $limit == -1) {
return 'text';
}
if (strpos($col, 'char') !== false) {
return 'string';
}
if (strpos($col, 'text') !== false) {
return 'text';
}
if (strpos($col, 'binary') !== false || $col === 'image') {
return 'binary';
}
if (in_array($col, array('float', 'real'))) {
return 'float';
}
if (in_array($col, array('decimal', 'numeric'))) {
return 'decimal';
}
return 'text';
}
/**
* Handle SQLServer specific length properties.
* SQLServer handles text types as nvarchar/varchar with a length of -1.
*
* @param mixed $length Either the length as a string, or a Column descriptor object.
* @return mixed null|integer with length of column.
*/
public function length($length) {
if (is_object($length) && isset($length->Length)) {
if ($length->Length == -1 && strpos($length->Type, 'char') !== false) {
return null;
}
if (in_array($length->Type, array('nchar', 'nvarchar'))) {
return floor($length->Length / 2);
}
if ($length->Type === 'text') {
return null;
}
return $length->Length;
}
return parent::length($length);
}
/**
* Builds a map of the columns contained in a result
*
* @param PDOStatement $results The result to modify.
* @return void
*/
public function resultSet($results) {
$this->map = array();
$numFields = $results->columnCount();
$index = 0;
while ($numFields-- > 0) {
$column = $results->getColumnMeta($index);
$name = $column['name'];
if (strpos($name, '__')) {
if (isset($this->_fieldMappings[$name]) && strpos($this->_fieldMappings[$name], '.')) {
$map = explode('.', $this->_fieldMappings[$name]);
} elseif (isset($this->_fieldMappings[$name])) {
$map = array(0, $this->_fieldMappings[$name]);
} else {
$map = array(0, $name);
}
} else {
$map = array(0, $name);
}
$map[] = ($column['sqlsrv:decl_type'] === 'bit') ? 'boolean' : $column['native_type'];
$this->map[$index++] = $map;
}
}
/**
* Builds final SQL statement
*
* @param string $type Query type
* @param array $data Query data
* @return string
*/
public function renderStatement($type, $data) {
switch (strtolower($type)) {
case 'select':
extract($data);
$fields = trim($fields);
if (strpos($limit, 'TOP') !== false && strpos($fields, 'DISTINCT ') === 0) {
$limit = 'DISTINCT ' . trim($limit);
$fields = substr($fields, 9);
}
// hack order as SQLServer requires an order if there is a limit.
if ($limit && !$order) {
$order = 'ORDER BY (SELECT NULL)';
}
// For older versions use the subquery version of pagination.
if (version_compare($this->getVersion(), '11', '<') && preg_match('/FETCH\sFIRST\s+([0-9]+)/i', $limit, $offset)) {
preg_match('/OFFSET\s*(\d+)\s*.*?(\d+)\s*ROWS/', $limit, $limitOffset);
$limit = 'TOP ' . (int)$limitOffset[2];
$page = (int)($limitOffset[1] / $limitOffset[2]);
$offset = (int)($limitOffset[2] * $page);
$rowCounter = static::ROW_COUNTER;
$sql = "SELECT {$limit} * FROM (
SELECT {$fields}, ROW_NUMBER() OVER ({$order}) AS {$rowCounter}
FROM {$table} {$alias} {$joins} {$conditions} {$group}
) AS _cake_paging_
WHERE _cake_paging_.{$rowCounter} > {$offset}
ORDER BY _cake_paging_.{$rowCounter}
";
return trim($sql);
}
if (strpos($limit, 'FETCH') !== false) {
return trim("SELECT {$fields} FROM {$table} {$alias} {$joins} {$conditions} {$group} {$order} {$limit}");
}
return trim("SELECT {$limit} {$fields} FROM {$table} {$alias} {$joins} {$conditions} {$group} {$order}");
case "schema":
extract($data);
foreach ($indexes as $i => $index) {
if (preg_match('/PRIMARY KEY/', $index)) {
unset($indexes[$i]);
break;
}
}
foreach (array('columns', 'indexes') as $var) {
if (is_array(${$var})) {
${$var} = "\t" . implode(",\n\t", array_filter(${$var}));
}
}
return trim("CREATE TABLE {$table} (\n{$columns});\n{$indexes}");
default:
return parent::renderStatement($type, $data);
}
}
/**
* Returns a quoted and escaped string of $data for use in an SQL statement.
*
* @param string $data String to be prepared for use in an SQL statement
* @param string $column The column into which this data will be inserted
* @param bool $null Column allows NULL values
* @return string Quoted and escaped data
*/
public function value($data, $column = null, $null = true) {
if ($data === null || is_array($data) || is_object($data)) {
return parent::value($data, $column, $null);
}
if (in_array($data, array('{$__cakeID__$}', '{$__cakeForeignKey__$}'), true)) {
return $data;
}
if (empty($column)) {
$column = $this->introspectType($data);
}
switch ($column) {
case 'string':
case 'text':
return 'N' . $this->_connection->quote($data, PDO::PARAM_STR);
default:
return parent::value($data, $column, $null);
}
}
/**
* Returns an array of all result rows for a given SQL query.
* Returns false if no rows matched.
*
* @param Model $model The model to read from
* @param array $queryData The query data
* @param int $recursive How many layers to go.
* @return array|false Array of resultset rows, or false if no rows matched
*/
public function read(Model $model, $queryData = array(), $recursive = null) {
$results = parent::read($model, $queryData, $recursive);
$this->_fieldMappings = array();
return $results;
}
/**
* Fetches the next row from the current result set.
* Eats the magic ROW_COUNTER variable.
*
* @return mixed
*/
public function fetchResult() {
if ($row = $this->_result->fetch(PDO::FETCH_NUM)) {
$resultRow = array();
foreach ($this->map as $col => $meta) {
list($table, $column, $type) = $meta;
if ($table === 0 && $column === static::ROW_COUNTER) {
continue;
}
$resultRow[$table][$column] = $row[$col];
if ($type === 'boolean' && $row[$col] !== null) {
$resultRow[$table][$column] = $this->boolean($resultRow[$table][$column]);
}
}
return $resultRow;
}
$this->_result->closeCursor();
return false;
}
/**
* Inserts multiple values into a table
*
* @param string $table The table to insert into.
* @param string $fields The fields to set.
* @param array $values The values to set.
* @return void
*/
public function insertMulti($table, $fields, $values) {
$primaryKey = $this->_getPrimaryKey($table);
$hasPrimaryKey = $primaryKey && (
(is_array($fields) && in_array($primaryKey, $fields)
|| (is_string($fields) && strpos($fields, $this->startQuote . $primaryKey . $this->endQuote) !== false))
);
if ($hasPrimaryKey) {
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($table) . ' ON');
}
parent::insertMulti($table, $fields, $values);
if ($hasPrimaryKey) {
$this->_execute('SET IDENTITY_INSERT ' . $this->fullTableName($table) . ' OFF');
}
}
/**
* Generate a database-native column schema string
*
* @param array $column An array structured like the
* following: array('name'=>'value', 'type'=>'value'[, options]),
* where options can be 'default', 'length', or 'key'.
* @return string
*/
public function buildColumn($column) {
$result = parent::buildColumn($column);
$result = preg_replace('/(bigint|int|integer)\([0-9]+\)/i', '$1', $result);
$result = preg_replace('/(bit)\([0-9]+\)/i', '$1', $result);
if (strpos($result, 'DEFAULT NULL') !== false) {
if (isset($column['default']) && $column['default'] === '') {
$result = str_replace('DEFAULT NULL', "DEFAULT ''", $result);
} else {
$result = str_replace('DEFAULT NULL', 'NULL', $result);
}
} elseif (array_keys($column) === array('type', 'name')) {
$result .= ' NULL';
} elseif (strpos($result, "DEFAULT N'")) {
$result = str_replace("DEFAULT N'", "DEFAULT '", $result);
}
return $result;
}
/**
* Format indexes for create table
*
* @param array $indexes The indexes to build
* @param string $table The table to make indexes for.
* @return string
*/
public function buildIndex($indexes, $table = null) {
$join = array();
foreach ($indexes as $name => $value) {
if ($name === 'PRIMARY') {
$join[] = 'PRIMARY KEY (' . $this->name($value['column']) . ')';
} elseif (isset($value['unique']) && $value['unique']) {
$out = "ALTER TABLE {$table} ADD CONSTRAINT {$name} UNIQUE";
if (is_array($value['column'])) {
$value['column'] = implode(', ', array_map(array(&$this, 'name'), $value['column']));
} else {
$value['column'] = $this->name($value['column']);
}
$out .= "({$value['column']});";
$join[] = $out;
}
}
return $join;
}
/**
* Makes sure it will return the primary key
*
* @param Model|string $model Model instance of table name
* @return string
*/
protected function _getPrimaryKey($model) {
$schema = $this->describe($model);
foreach ($schema as $field => $props) {
if (isset($props['key']) && $props['key'] === 'primary') {
return $field;
}
}
return null;
}
/**
* Returns number of affected rows in previous database operation. If no previous operation exists,
* this returns false.
*
* @param mixed $source Unused
* @return int Number of affected rows
*/
public function lastAffected($source = null) {
$affected = parent::lastAffected();
if ($affected === null && $this->_lastAffected !== false) {
return $this->_lastAffected;
}
return $affected;
}
/**
* Executes given SQL statement.
*
* @param string $sql SQL statement
* @param array $params list of params to be bound to query (supported only in select)
* @param array $prepareOptions Options to be used in the prepare statement
* @return mixed PDOStatement if query executes with no problem, true as the result of a successful, false on error
* query returning no rows, such as a CREATE statement, false otherwise
* @throws PDOException
*/
protected function _execute($sql, $params = array(), $prepareOptions = array()) {
$this->_lastAffected = false;
$sql = trim($sql);
if (strncasecmp($sql, 'SELECT', 6) === 0 || preg_match('/^EXEC(?:UTE)?\s/mi', $sql) > 0) {
$prepareOptions += array(PDO::ATTR_CURSOR => PDO::CURSOR_SCROLL);
return parent::_execute($sql, $params, $prepareOptions);
}
try {
$this->_lastAffected = $this->_connection->exec($sql);
if ($this->_lastAffected === false) {
$this->_results = null;
$error = $this->_connection->errorInfo();
$this->error = $error[2];
return false;
}
return true;
} catch (PDOException $e) {
if (isset($query->queryString)) {
$e->queryString = $query->queryString;
} else {
$e->queryString = $sql;
}
throw $e;
}
}
/**
* Generate a "drop table" statement for the given table
*
* @param type $table Name of the table to drop
* @return string Drop table SQL statement
*/
protected function _dropTable($table) {
return "IF OBJECT_ID('" . $this->fullTableName($table, false) . "', 'U') IS NOT NULL DROP TABLE " . $this->fullTableName($table) . ";";
}
/**
* Gets the schema name
*
* @return string The schema name
*/
public function getSchemaName() {
return $this->config['schema'];
}
}
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