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<?php
/*
* Copyright 2010-2013 by MODX, LLC.
*
* This file is part of xPDO.
*
* xPDO is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* xPDO is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
* A PARTICULAR PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with
* xPDO; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*/
/**
* The sqlsrv implementation of xPDOQuery.
*
* @package xpdo
* @subpackage om.sqlsrv
*/
/** Include the base {@see xPDOQuery} class */
include_once (dirname(dirname(__FILE__)) . '/xpdoquery.class.php');
/**
* An implementation of xPDOQuery for the sqlsrv database driver.
*
* @package xpdo
* @subpackage om.sqlsrv
*/
class xPDOQuery_sqlsrv extends xPDOQuery {
public function __construct(& $xpdo, $class, $criteria= null) {
parent :: __construct($xpdo, $class, $criteria);
$this->query['top']= 0;
}
public function parseConditions($conditions, $conjunction = xPDOQuery::SQL_AND) {
$result= array ();
$pk= $this->xpdo->getPK($this->_class);
$pktype= $this->xpdo->getPKType($this->_class);
$fieldMeta= $this->xpdo->getFieldMeta($this->_class, true);
$command= strtoupper($this->query['command']);
$alias= $command == 'SELECT' ? $this->_class : $this->xpdo->getTableName($this->_class, false);
$alias= trim($alias, $this->xpdo->_escapeCharOpen . $this->xpdo->_escapeCharClose);
if (is_array($conditions)) {
if (isset($conditions[0]) && is_scalar($conditions[0]) && !$this->isConditionalClause($conditions[0]) && is_array($pk) && count($conditions) == count($pk)) {
$iteration= 0;
foreach ($pk as $k) {
if (!isset ($conditions[$iteration])) {
$conditions[$iteration]= null;
}
$isString= in_array($fieldMeta[$k]['phptype'], $this->_quotable);
$field= array();
$field['sql']= $this->xpdo->escape($alias) . '.' . $this->xpdo->escape($k) . " = ?";
$field['binding']= array (
'value' => $conditions[$iteration],
'type' => $isString ? PDO::PARAM_STR : PDO::PARAM_INT,
'length' => 0
);
$field['conjunction']= $conjunction;
$result[$iteration]= new xPDOQueryCondition($field);
$iteration++;
}
} else {
reset($conditions);
while (list ($key, $val)= each($conditions)) {
if (is_int($key)) {
if (is_array($val)) {
$result[]= $this->parseConditions($val, $conjunction);
continue;
} elseif ($this->isConditionalClause($val)) {
$result[]= new xPDOQueryCondition(array('sql' => $val, 'binding' => null, 'conjunction' => $conjunction));
continue;
} else {
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, "Error parsing condition with key {$key}: " . print_r($val, true));
continue;
}
} elseif (is_scalar($val) || is_array($val) || $val === null) {
$alias= $command == 'SELECT' ? $this->_class : trim($this->xpdo->getTableName($this->_class, false), $this->xpdo->_escapeCharOpen . $this->xpdo->_escapeCharClose);
$operator= '=';
$conj = $conjunction;
$key_operator= explode(':', $key);
if ($key_operator && count($key_operator) === 2) {
$key= $key_operator[0];
$operator= $key_operator[1];
}
elseif ($key_operator && count($key_operator) === 3) {
$conj= $key_operator[0];
$key= $key_operator[1];
$operator= $key_operator[2];
}
if (strpos($key, '.') !== false) {
$key_parts= explode('.', $key);
$alias= trim($key_parts[0], " {$this->xpdo->_escapeCharOpen}{$this->xpdo->_escapeCharClose}");
$key= $key_parts[1];
}
if ($val === null) {
$type= PDO::PARAM_NULL;
if (!in_array($operator, array('IS', 'IS NOT'))) {
$operator= $operator === '!=' ? 'IS NOT' : 'IS';
}
}
elseif (isset($fieldMeta[$key]) && !in_array($fieldMeta[$key]['phptype'], $this->_quotable)) {
$type= PDO::PARAM_INT;
}
else {
$type= PDO::PARAM_STR;
}
if (in_array(strtoupper($operator), array('IN', 'NOT IN')) && is_array($val)) {
$vals = array();
foreach ($val as $v) {
switch ($type) {
case PDO::PARAM_INT:
$vals[] = (integer) $v;
break;
case PDO::PARAM_STR:
$vals[] = $this->xpdo->quote($v);
break;
default:
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, "Error parsing {$operator} condition with key {$key}: " . print_r($v, true));
break;
}
}
if (!empty($vals)) {
$val = "(" . implode(',', $vals) . ")";
$sql = "{$this->xpdo->escape($alias)}.{$this->xpdo->escape($key)} {$operator} {$val}";
$result[]= new xPDOQueryCondition(array('sql' => $sql, 'binding' => null, 'conjunction' => $conj));
continue;
} else {
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, "Error parsing {$operator} condition with key {$key}: " . print_r($val, true));
continue;
}
}
$field= array ();
if ($type === PDO::PARAM_NULL) {
$field['sql']= $this->xpdo->escape($alias) . '.' . $this->xpdo->escape($key) . ' ' . $operator . ' NULL';
$field['binding']= null;
$field['conjunction']= $conj;
} else {
$field['sql']= $this->xpdo->escape($alias) . '.' . $this->xpdo->escape($key) . ' ' . $operator . ' ?';
$field['binding']= array (
'value' => $val,
'type' => $type,
'length' => 0
);
$field['conjunction']= $conj;
}
$result[]= new xPDOQueryCondition($field);
}
}
}
}
elseif ($this->isConditionalClause($conditions)) {
$result= new xPDOQueryCondition(array(
'sql' => $conditions
,'binding' => null
,'conjunction' => $conjunction
));
}
elseif (($pktype == 'integer' && is_numeric($conditions)) || ($pktype == 'string' && is_string($conditions))) {
if ($pktype == 'integer') {
$param_type= PDO::PARAM_INT;
} else {
$param_type= PDO::PARAM_STR;
}
$field['sql']= $this->xpdo->escape($alias) . '.' . $this->xpdo->escape($pk) . ' = ?';
$field['binding']= array ('value' => $conditions, 'type' => $param_type, 'length' => 0);
$field['conjunction']= $conjunction;
$result = new xPDOQueryCondition($field);
}
return $result;
}
public function construct() {
$constructed= false;
$this->bindings= array ();
$command= strtoupper($this->query['command']);
$sql= $this->query['command'] . ' ';
$limit= !empty($this->query['limit']) ? intval($this->query['limit']) : 0;
$offset= !empty($this->query['offset']) ? intval($this->query['offset']) : 0;
$orderBySql = '';
if ($command == 'SELECT' && !empty ($this->query['sortby'])) {
$sortby= reset($this->query['sortby']);
$orderBySql= 'ORDER BY ';
$orderBySql.= $sortby['column'];
if ($sortby['direction']) $orderBySql.= ' ' . $sortby['direction'];
while ($sortby= next($this->query['sortby'])) {
$orderBySql.= ', ';
$orderBySql.= $sortby['column'];
if ($sortby['direction']) $orderBySql.= ' ' . $sortby['direction'];
}
}
if ($command == 'SELECT' && $orderBySql == '' && !empty($limit) && !empty($offset)) {
$pk = $this->xpdo->getPK($this->getClass());
if ($pk) {
if (!is_array($pk)) $pk = array($pk);
$orderBy = array();
foreach ($pk as $k) {
$orderBy[] = $this->xpdo->escape($this->getAlias()) . '.' . $this->xpdo->escape($k);
}
$orderBySql = "ORDER BY " . implode(', ', $orderBy);
}
}
if ($command == 'SELECT') {
$sql.= !empty($this->query['distinct']) ? $this->query['distinct'] . ' ' : '';
if (!empty($limit) && empty($offset)) {
$this->query['top'] = $limit;
}
$sql.= $this->query['top'] > 0 ? 'TOP ' . $this->query['top'] . ' ' : '';
$columns= array ();
if (empty ($this->query['columns'])) {
$this->select('*');
}
foreach ($this->query['columns'] as $alias => $column) {
$ignorealias = is_int($alias);
$escape = !preg_match('/\bAS\b/i', $column) && !preg_match('/\./', $column) && !preg_match('/\(/', $column);
if ($escape) {
$column= $this->xpdo->escape(trim($column));
} else {
$column= trim($column);
}
if (!$ignorealias) {
$alias = $escape ? $this->xpdo->escape($alias) : $alias;
$columns[]= "{$column} AS {$alias}";
} else {
$columns[]= "{$column}";
}
}
$sql.= implode(', ', $columns);
if(!empty($limit) && !empty($offset)) {
$sql.= ', ROW_NUMBER() OVER (' . $orderBySql . ') AS [xpdoRowNr]';
}
$sql.= ' ';
}
if ($command != 'UPDATE') {
$sql.= 'FROM ';
}
$tables= array ();
foreach ($this->query['from']['tables'] as $table) {
if ($command != 'SELECT') {
$tables[]= $this->xpdo->escape($table['table']);
} else {
$tables[]= $this->xpdo->escape($table['table']) . ' AS ' . $this->xpdo->escape($table['alias']);
}
}
$sql.= $this->query['from']['tables'] ? implode(', ', $tables) . ' ' : '';
if (!empty ($this->query['from']['joins'])) {
foreach ($this->query['from']['joins'] as $join) {
$sql.= $join['type'] . ' ' . $this->xpdo->escape($join['table']) . ' AS ' . $this->xpdo->escape($join['alias']) . ' ';
if (!empty ($join['conditions'])) {
$sql.= 'ON ';
$sql.= $this->buildConditionalClause($join['conditions']);
$sql.= ' ';
}
}
}
if ($command == 'UPDATE') {
if (!empty($this->query['set'])) {
reset($this->query['set']);
$clauses = array();
while (list($setKey, $setVal) = each($this->query['set'])) {
$value = $setVal['value'];
$type = $setVal['type'];
if ($value !== null && in_array($type, array(PDO::PARAM_INT, PDO::PARAM_STR))) {
$value = $this->xpdo->quote($value, $type);
} elseif ($value === null) {
$value = 'NULL';
}
$clauses[] = $this->xpdo->escape($setKey) . ' = ' . $value;
}
if (!empty($clauses)) {
$sql.= 'SET ' . implode(', ', $clauses) . ' ';
}
unset($clauses);
}
}
if (!empty ($this->query['where'])) {
if ($where= $this->buildConditionalClause($this->query['where'])) {
$sql.= 'WHERE ' . $where . ' ';
}
}
if ($command == 'SELECT' && !empty ($this->query['groupby'])) {
$groupby= reset($this->query['groupby']);
$sql.= 'GROUP BY ';
$sql.= $groupby['column'];
if ($groupby['direction']) $sql.= ' ' . $groupby['direction'];
while ($groupby= next($this->query['groupby'])) {
$sql.= ', ';
$sql.= $groupby['column'];
if ($groupby['direction']) $sql.= ' ' . $groupby['direction'];
}
$sql.= ' ';
}
if (!empty ($this->query['having'])) {
$sql.= 'HAVING ';
$sql.= $this->buildConditionalClause($this->query['having']);
$sql.= ' ';
}
if ($command == 'SELECT' && !empty($limit) && !empty($offset)) {
if (!empty($orderBySql)) {
$sql = "WITH OrderedSettings AS ($sql) SELECT * FROM OrderedSettings WHERE [xpdoRowNr] BETWEEN " . ($offset + 1) . " AND " . ($offset + $limit);
} else {
$this->xpdo->log(xPDO::LOG_LEVEL_ERROR, "limit() in sqlsrv requires either an explicit sortby or a defined primary key; limit ignored");
}
} else {
$sql.= $orderBySql;
}
$this->sql= $sql;
return (!empty ($this->sql));
}
}