diff --git a/classes/Backup.php b/classes/Backup.php
index 85d9b8496..c3d54f959 100644
--- a/classes/Backup.php
+++ b/classes/Backup.php
@@ -243,7 +243,7 @@ class BackupCore
 
 			if (!in_array($schema[0]['Table'], $ignore_insert_table))
 			{
-				$data = Db::getInstance()->executeS('SELECT * FROM `' . $schema[0]['Table'] . '`', false);
+				$data = Db::getInstance()->query('SELECT * FROM `' . $schema[0]['Table'] . '`', false);
 				$sizeof = DB::getInstance()->NumRows();
 				$lines = explode("\n", $schema[0]['Create Table']);
 
diff --git a/classes/CartRule.php b/classes/CartRule.php
index 18f9a82a3..d1afaff90 100644
--- a/classes/CartRule.php
+++ b/classes/CartRule.php
@@ -260,12 +260,12 @@ class CartRuleCore extends ObjectModel
 			return array();
 
 		$productRules = array();
-		$result = Db::getInstance()->ExecuteS('
+		$results = Db::getInstance()->ExecuteS('
 		SELECT *
 		FROM '._DB_PREFIX_.'cart_rule_product_rule pr
 		LEFT JOIN '._DB_PREFIX_.'cart_rule_product_rule_value prv ON pr.id_product_rule = prv.id_product_rule
 		WHERE pr.id_cart_rule = '.(int)$this->id, false);
-		while ($row = Db::getInstance()->nextRow($result))
+		foreach ($results as $row)
 		{
 			if (!isset($productRules[$row['id_product_rule']]))
 				$productRules[$row['id_product_rule']] = array('quantity' => $row['quantity'], 'type' => $row['type'], 'values' => array());
diff --git a/classes/GroupReduction.php b/classes/GroupReduction.php
index 142b84443..dcf34157c 100644
--- a/classes/GroupReduction.php
+++ b/classes/GroupReduction.php
@@ -62,18 +62,18 @@ class GroupReductionCore extends ObjectModel
 
 	public function delete()
 	{
-		$resource = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
+		$products = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
 			SELECT p.`id_product`
 			FROM `'._DB_PREFIX_.'product` p
 			WHERE p.`id_category_default` = '.(int)$this->id_category
-		, false);
+		);
 
-		while ($row = Db::getInstance()->nextRow($resource))
-		{
-			$query = 'DELETE FROM `'._DB_PREFIX_.'product_group_reduction_cache` WHERE `id_product` = '.(int)$row['id_product'];
-			if (Db::getInstance()->execute($query) === false)
-				return false;
-		}
+		$ids = array();
+		foreach ($products as $row)
+			$ids[] = $row['id_product'];
+
+		if ($ids)
+			Db::getInstance()->delete(_DB_PREFIX_.'product_group_reduction_cache', 'id_product IN ('.implode(', ', $ids).')');
 		return (parent::delete());
 	}
 
@@ -84,15 +84,15 @@ class GroupReductionCore extends ObjectModel
 
 	protected function _setCache()
 	{
-		$resource = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
+		$products = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
 			SELECT p.`id_product`
 			FROM `'._DB_PREFIX_.'product` p
 			WHERE p.`id_category_default` = '.(int)$this->id_category
-		, false);
+		);
 
 		$query = 'INSERT INTO `'._DB_PREFIX_.'product_group_reduction_cache` (`id_product`, `id_group`, `reduction`) VALUES ';
 		$updated = false;
-		while ($row = Db::getInstance()->nextRow($resource))
+		foreach ($products as $row)
 		{
 			$query .= '('.(int)$row['id_product'].', '.(int)$this->id_group.', '.(float)$this->reduction.'), ';
 			$updated = true;
@@ -105,21 +105,23 @@ class GroupReductionCore extends ObjectModel
 
 	protected function _updateCache()
 	{
-		$resource = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
+		$products = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
 			SELECT p.`id_product`
 			FROM `'._DB_PREFIX_.'product` p
 			WHERE p.`id_category_default` = '.(int)$this->id_category
 		, false);
 
-		while ($row = Db::getInstance()->nextRow($resource))
-		{
-			$query = 'UPDATE `'._DB_PREFIX_.'product_group_reduction_cache`
-                                  SET `reduction` = '.(float)$this->reduction.'
-                                  WHERE `id_product` = '.(int)$row['id_product'].' AND `id_group` = '.(int)$this->id_group;
-			if (Db::getInstance()->execute($query) === false)
-				return false;
-		}
-		return true;
+		$ids = array();
+		foreach ($products as $product)
+			$ids[] = $product['id_product'];
+
+		$result = true;
+		if ($ids)
+			$result &= Db::getInstance()->autoExecute(_DB_PREFIX_.'product_group_reduction_cache', array(
+				'reduction' => (float)$this->reduction,
+			), 'UPDATE', 'id_product IN('.implode(', ', $ids).') AND id_group = '.(int)$this->id_group);
+
+		return $result;
 	}
 
 	public static function getGroupReductions($id_group, $id_lang)
diff --git a/classes/Hook.php b/classes/Hook.php
index 9fcc836d0..bcb8ef679 100644
--- a/classes/Hook.php
+++ b/classes/Hook.php
@@ -220,11 +220,11 @@ class HookCore extends ObjectModel
 			$sql .= '
 					GROUP BY hm.id_hook, hm.id_module
 					ORDER BY hm.`position`';
-			$result = $db->executeS($sql, false);
+			$results = $db->executeS($sql);
 			self::$_hookModulesCache = array();
 
-			if ($result)
-				while ($row = $db->nextRow())
+			if ($results)
+				foreach ($results as $row)
 				{
 					$row['hook'] = strtolower($row['hook']);
 					if (!isset(self::$_hookModulesCache[$row['hook']]))
diff --git a/classes/Product.php b/classes/Product.php
index bb5154f00..b78ca3c3c 100644
--- a/classes/Product.php
+++ b/classes/Product.php
@@ -3226,16 +3226,15 @@ class ProductCore extends ObjectModel
 		$sql = 'SELECT `display_filename`, `filename`, `date_add`, `date_expiration`, `nb_days_accessible`, `nb_downloadable`, `active`, `is_shareable`
 				FROM `'._DB_PREFIX_.'product_download`
 				WHERE `id_product` = '.(int)$id_product_old;
-		$resource = Db::getInstance()->execute($sql);
-
-		if (!Db::getInstance()->NumRows())
+		$results = Db::getInstance()->executeS($sql);
+		if (!$results)
 			return true;
 
 		$query = 'INSERT INTO `'._DB_PREFIX_.'product_download`
 			(`id_product`, `display_filename`, `filename`, `date_add`, `date_expiration`, `nb_days_accessible`, `nb_downloadable`, `active`, `is_shareable`)
 			VALUES';
 
-		while ($row = Db::getInstance()->nextRow($resource))
+		foreach ($results as $row)
 			$query .= ' ('.(int)$id_product_new.', \''.pSQL($row['display_filename']).'\', \''.pSQL($row['filename']).
 				'\', \''.pSQL($row['date_add']).'\', \''.pSQL($row['date_expiration']).'\', '.(int)$row['nb_days_accessible'].
 				', '.(int)$row['nb_downloadable'].', '.(int)$row['active'].'), '.(int)$row['is_shareable'].'),';
diff --git a/classes/Search.php b/classes/Search.php
index 7f0879493..c8be9ac7b 100644
--- a/classes/Search.php
+++ b/classes/Search.php
@@ -219,16 +219,15 @@ class SearchCore
 						SELECT id_group FROM '._DB_PREFIX_.'customer_group
 						WHERE id_customer = '.(int)$id_customer.'
 					)');
-		$result = $db->executeS($sql, false);
+		$results = $db->executeS($sql);
 
 		$eligibleProducts = array();
-		while ($row = $db->nextRow($result))
+		foreach ($results as $row)
 			$eligibleProducts[] = $row['id_product'];
 		foreach ($intersectArray as $query)
 		{
-			$result = $db->executeS($query, false);
 			$eligibleProducts2 = array();
-			while ($row = $db->nextRow($result))
+			foreach ($db->executeS($query) as $row)
 				$eligibleProducts2[] = $row['id_product'];
 
 			$eligibleProducts = array_intersect($eligibleProducts, $eligibleProducts2);
@@ -418,19 +417,18 @@ class SearchCore
 			'features' => Configuration::get('PS_SEARCH_WEIGHT_FEATURE')
 		);
 
-		// Those are kind of global variables required to save the processed data in the database every X occurences, in order to avoid overloading MySQL
+		// Those are kind of global variables required to save the processed data in the database every X occurrences, in order to avoid overloading MySQL
 		$countWords = 0;
 		$countProducts = 0;
 		$queryArray3 = array();
 		$productsArray = array();
 
 		// Every indexed words are cached into a PHP array
-		$wordIdsByWord = array();
 		$wordIds = Db::getInstance()->executeS('
-		SELECT id_word, word, id_lang, id_shop
-		FROM '._DB_PREFIX_.'search_word', false);
+			SELECT id_word, word, id_lang, id_shop
+			FROM '._DB_PREFIX_.'search_word');
 		$wordIdsByWord = array();
-		while ($wordId = $db->nextRow($wordIds))
+		foreach ($wordIds as $wordId)
 		{
 			if (!isset($wordIdsByWord[$wordId['id_shop']][$wordId['id_lang']]))
 				$wordIdsByWord[$wordId['id_shop']][$wordId['id_lang']] = array();
diff --git a/classes/SpecificPrice.php b/classes/SpecificPrice.php
index 1c0ba1cc1..bb0eb32dc 100644
--- a/classes/SpecificPrice.php
+++ b/classes/SpecificPrice.php
@@ -286,7 +286,7 @@ class SpecificPriceCore extends ObjectModel
 		if (!self::isFeatureActive())
 			return array();
 
-		$resource = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
+		$results = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS('
 			SELECT `id_product`
 			FROM `'._DB_PREFIX_.'specific_price`
 			WHERE	`id_shop` IN(0, '.(int)$id_shop.') AND
@@ -301,9 +301,9 @@ class SpecificPriceCore extends ObjectModel
 					)
 					AND
 					`reduction` > 0
-		', false);
+		');
 		$ids_product = array();
-		while ($row = DB::getInstance()->nextRow($resource))
+		foreach ($results as $row)
 			$ids_product[] = (int)$row['id_product'];
 		return $ids_product;
 	}
diff --git a/classes/db/Db.php b/classes/db/Db.php
index c4a2e3b7a..a65d76a3f 100644
--- a/classes/db/Db.php
+++ b/classes/db/Db.php
@@ -362,14 +362,14 @@ abstract class DbCore
 	 * @param bool $use_cache Use cache or not
 	 * @return bool
 	 */
-	public function delete($table, $where = false, $limit = false, $use_cache = 1)
+	public function delete($table, $where = false, $limit = false, $use_cache = true)
 	{
 		$this->result = false;
 		$sql = 'DELETE FROM `'.bqSQL($table).'`'.($where ? ' WHERE '.$where : '').($limit ? ' LIMIT '.(int)$limit : '');
 		$res = $this->query($sql);
 		if ($use_cache && $this->is_cache_enabled)
 			Cache::getInstance()->deleteQuery($sql);
-		return $res;
+		return (bool)$res;
 	}
 
 	/**
@@ -377,30 +377,30 @@ abstract class DbCore
 	 *
 	 * @param string $sql
 	 * @param bool $use_cache
-	 * @return mixed
+	 * @return bool
 	 */
-	public function execute($sql, $use_cache = 1)
+	public function execute($sql, $use_cache = true)
 	{
 		$sql = (string)$sql;
 		$this->result = $this->query($sql);
 		if ($use_cache && $this->is_cache_enabled)
 			Cache::getInstance()->deleteQuery($sql);
-		return $this->result;
+		return (bool)$this->result;
 	}
 
 	/**
 	 * ExecuteS return the result of $sql as array
 	 *
 	 * @param string $sql query to execute
-	 * @param boolean $array return an array instead of a mysql_result object
+	 * @param boolean $array return an array instead of a mysql_result object (deprecated since 1.5.0, use query method instead)
 	 * @param int $use_cache if query has been already executed, use its result
 	 * @return array or result object
 	 */
-	public function executeS($sql, $array = true, $use_cache = 1)
+	public function executeS($sql, $array = true, $use_cache = true)
 	{
 		$sql = (string)$sql;
 
-		// This methode must be used only with queries which display results
+		// This method must be used only with queries which display results
 		if (!preg_match('#^\s*(select|show|explain|describe)\s#i', $sql))
 		{
 			if (defined('_PS_MODE_DEV_') && _PS_MODE_DEV_)
@@ -441,7 +441,7 @@ abstract class DbCore
 	 * @param int $use_cache find it in cache first
 	 * @return array associative array of (field=>value)
 	 */
-	public function getRow($sql, $use_cache = 1)
+	public function getRow($sql, $use_cache = true)
 	{
 		$sql = (string)$sql;
 		$sql .= ' LIMIT 1';
@@ -471,7 +471,7 @@ abstract class DbCore
 	 * @param int $use_cache
 	 * @return void
 	 */
-	public function getValue($sql, $use_cache = 1)
+	public function getValue($sql, $use_cache = true)
 	{
 		$sql = (string)$sql;
 		if (!$result = $this->getRow($sql, $use_cache))
@@ -504,7 +504,7 @@ abstract class DbCore
 	 * @param string $sql
 	 * @param bool $use_cache
 	 */
-	protected function q($sql, $use_cache = 1)
+	protected function q($sql, $use_cache = true)
 	{
 		global $webservice_call;
 
diff --git a/classes/stock/StockManager.php b/classes/stock/StockManager.php
index 47f3f8757..7258fb8b7 100644
--- a/classes/stock/StockManager.php
+++ b/classes/stock/StockManager.php
@@ -294,7 +294,7 @@ class StockManagerCore implements StockManagerInterface
 						if ($left_quantity_to_check <= 0)
 							continue;
 
-						$resource = Db::getInstance(_PS_USE_SQL_SLAVE_)->execute('
+						$resource = Db::getInstance(_PS_USE_SQL_SLAVE_)->query('
 							SELECT sm.`id_stock_mvt`, sm.`date_add`, sm.`physical_quantity`,
 								IF ((sm2.`physical_quantity` is null), sm.`physical_quantity`, (sm.`physical_quantity` - SUM(sm2.`physical_quantity`))) as qty
 							FROM `'._DB_PREFIX_.'stock_mvt` sm
diff --git a/controllers/admin/AdminCartRulesController.php b/controllers/admin/AdminCartRulesController.php
index bcc1f5763..9136ebab9 100644
--- a/controllers/admin/AdminCartRulesController.php
+++ b/controllers/admin/AdminCartRulesController.php
@@ -166,14 +166,14 @@ class AdminCartRulesControllerCore extends AdminController
 		{
 			case 'attributes':
 				$attributes = array('selected' => array(), 'unselected' => array());
-				$result = Db::getInstance()->ExecuteS('
+				$results = Db::getInstance()->ExecuteS('
 				SELECT CONCAT(agl.name, " - ", al.name) as name, a.id_attribute as id
 				FROM '._DB_PREFIX_.'attribute_group_lang agl
 				LEFT JOIN '._DB_PREFIX_.'attribute a ON a.id_attribute_group = agl.id_attribute_group
 				LEFT JOIN '._DB_PREFIX_.'attribute_lang al ON (a.id_attribute = al.id_attribute AND al.id_lang = '.(int)Context::getContext()->language->id.')
 				WHERE agl.id_lang = '.(int)Context::getContext()->language->id.'
-				ORDER BY agl.name, al.name', false);
-				while ($row = Db::getInstance()->nextRow($result))
+				ORDER BY agl.name, al.name');
+				foreach ($results as $row)
 					$attributes[in_array($row['id'], $selected) ? 'selected' : 'unselected'][] = $row;
 				Context::getContext()->smarty->assign('product_rule_itemlist', $attributes);
 				$choose_content = Context::getContext()->smarty->fetch('cart_rules/product_rule_itemlist.tpl');
@@ -182,12 +182,12 @@ class AdminCartRulesControllerCore extends AdminController
 			case 'products':
 				// Todo: Consider optimization
 				$products = array('selected' => array(), 'unselected' => array());
-				$result = Db::getInstance()->ExecuteS('
+				$results = Db::getInstance()->ExecuteS('
 				SELECT name, id_product as id
 				FROM '._DB_PREFIX_.'product_lang pl
 				WHERE id_lang = '.(int)Context::getContext()->language->id.'
-				ORDER BY name', false);
-				while ($row = Db::getInstance()->nextRow($result))
+				ORDER BY name');
+				foreach ($results as $row)
 					$products[in_array($row['id'], $selected) ? 'selected' : 'unselected'][] = $row;
 				Context::getContext()->smarty->assign('product_rule_itemlist', $products);
 				$choose_content = Context::getContext()->smarty->fetch('cart_rules/product_rule_itemlist.tpl');
@@ -196,12 +196,12 @@ class AdminCartRulesControllerCore extends AdminController
 			case 'categories':
 				// Todo: Consider optimization
 				$categories = array('selected' => array(), 'unselected' => array());
-				$result = Db::getInstance()->ExecuteS('
+				$results = Db::getInstance()->ExecuteS('
 				SELECT name, id_category as id
 				FROM '._DB_PREFIX_.'category_lang pl
 				WHERE id_lang = '.(int)Context::getContext()->language->id.'
-				ORDER BY name', false);
-				while ($row = Db::getInstance()->nextRow($result))
+				ORDER BY name');
+				foreach ($results as $row)
 					$categories[in_array($row['id'], $selected) ? 'selected' : 'unselected'][] = $row;
 				Context::getContext()->smarty->assign('product_rule_itemlist', $categories);
 				$choose_content = Context::getContext()->smarty->fetch('cart_rules/product_rule_itemlist.tpl');
diff --git a/controllers/admin/AdminSupplyOrdersController.php b/controllers/admin/AdminSupplyOrdersController.php
index 5862412f1..9add7e684 100644
--- a/controllers/admin/AdminSupplyOrdersController.php
+++ b/controllers/admin/AdminSupplyOrdersController.php
@@ -1102,7 +1102,7 @@ class AdminSupplyOrdersControllerCore extends AdminController
 				$query->from('supply_order_detail');
 				$query->where('id_supply_order = '.(int)$id);
 				$query->orderBy('id_supply_order_detail DESC');
-				$resource = Db::getInstance()->execute($query);
+				$resource = Db::getInstance()->query($query);
 				// gets details
 				while ($row = Db::getInstance()->nextRow($resource))
        				 echo sprintf("%s\n", implode(';', array_map(array('CSVCore', 'wrap'), $row)));
diff --git a/install-dev/classes/Module.php b/install-dev/classes/Module.php
index 4cc1db750..8d7bc16fa 100644
--- a/install-dev/classes/Module.php
+++ b/install-dev/classes/Module.php
@@ -666,17 +666,17 @@ abstract class Module
 		if (!isset(self::$_hookModulesCache))
 		{
 			$db = Db::getInstance(_PS_USE_SQL_SLAVE_);
-			$result = $db->executeS('
+			$results = $db->executeS('
 			SELECT h.`name` as hook, m.`id_module`, h.`id_hook`, m.`name` as module, h.`live_edit`
 			FROM `'._DB_PREFIX_.'module` m
 			LEFT JOIN `'._DB_PREFIX_.'hook_module` hm ON hm.`id_module` = m.`id_module`
 			LEFT JOIN `'._DB_PREFIX_.'hook` h ON hm.`id_hook` = h.`id_hook`
 			AND m.`active` = 1
-			ORDER BY hm.`position`', false);
+			ORDER BY hm.`position`');
 			self::$_hookModulesCache = array();
 
-			if ($result)
-				while ($row = $db->nextRow())
+			if ($results)
+				foreach ($results as $row)
 				{
 					$row['hook'] = strtolower($row['hook']);
 					if (!isset(self::$_hookModulesCache[$row['hook']]))
diff --git a/install-dev/php/price_converter.php b/install-dev/php/price_converter.php
index 07815e130..7e1e1e1ca 100644
--- a/install-dev/php/price_converter.php
+++ b/install-dev/php/price_converter.php
@@ -32,10 +32,8 @@ function convert_product_price()
 	$taxRates = array();
 	foreach ($taxes as $data)
 		$taxRates[$data['id_tax']] = (float)($data['rate']) / 100;
-	$resource = DB::getInstance()->executeS('SELECT `id_product`, `price`, `id_tax` FROM `'._DB_PREFIX_.'product`', false);
-	if (!$resource)
-		die(Db::getInstance()->getMsgError());
-	while ($row = DB::getInstance()->nextRow($resource))
+	$results = DB::getInstance()->executeS('SELECT `id_product`, `price`, `id_tax` FROM `'._DB_PREFIX_.'product`');
+	foreach ($results as $row)
 		if ($row['id_tax'])
 		{
 			$price = $row['price'] * (1 + $taxRates[$row['id_tax']]);
diff --git a/modules/blocklayered/blocklayered.php b/modules/blocklayered/blocklayered.php
index bec2e7ba2..d0b33e45c 100644
--- a/modules/blocklayered/blocklayered.php
+++ b/modules/blocklayered/blocklayered.php
@@ -2082,19 +2082,19 @@ class BlockLayered extends Module
 				AND psi.`id_currency` = '.$idCurrency;
 		}
 		
-		$allProductsOut = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS('
+		$allProductsOut = Db::getInstance(_PS_USE_SQL_SLAVE_)->query('
 		SELECT p.`id_product` id_product
 		FROM `'._DB_PREFIX_.'product` p
 		'.$priceFilterQueryOut.'
 		'.$queryFiltersFrom.'
-		WHERE 1 '.$queryFiltersWhere.' GROUP BY id_product', false);
+		WHERE 1 '.$queryFiltersWhere.' GROUP BY id_product');
 		
-		$allProductsIn = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS('
+		$allProductsIn = Db::getInstance(_PS_USE_SQL_SLAVE_)->query('
 		SELECT p.`id_product` id_product
 		FROM `'._DB_PREFIX_.'product` p
 		'.$priceFilterQueryIn.'
 		'.$queryFiltersFrom.'
-		WHERE 1 '.$queryFiltersWhere.' GROUP BY id_product', false);
+		WHERE 1 '.$queryFiltersWhere.' GROUP BY id_product');
 
 		$productIdList = array();
 		
@@ -3304,7 +3304,7 @@ class BlockLayered extends Module
 		$nCategories = array();
 		$doneCategories = array();
 
-		$attributeGroups = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS('
+		$attributeGroups = Db::getInstance(_PS_USE_SQL_SLAVE_)->query('
 		SELECT a.id_attribute, a.id_attribute_group
 		FROM '._DB_PREFIX_.'attribute a
 		LEFT JOIN '._DB_PREFIX_.'product_attribute_combination pac ON (pac.id_attribute = a.id_attribute)
@@ -3313,13 +3313,13 @@ class BlockLayered extends Module
 		LEFT JOIN '._DB_PREFIX_.'category_product cp ON (cp.id_product = p.id_product)
 		LEFT JOIN '._DB_PREFIX_.'category c ON (c.id_category = cp.id_category)
 		WHERE c.active = 1'.(count($categoriesIds) ? ' AND cp.id_category IN ('.implode(',', $categoriesIds).')' : '').' AND p.active = 1'.(count($productsIds) ? '
-		AND p.id_product IN ('.implode(',', $productsIds).')' : ''), false);
+		AND p.id_product IN ('.implode(',', $productsIds).')' : ''));
 
 		$attributeGroupsById = array();
 		while ($row = $db->nextRow($attributeGroups))
 			$attributeGroupsById[(int)$row['id_attribute']] = (int)$row['id_attribute_group'];
 
-		$features = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS('
+		$features = Db::getInstance(_PS_USE_SQL_SLAVE_)->query('
 		SELECT fv.id_feature_value, fv.id_feature
 		FROM '._DB_PREFIX_.'feature_value fv
 		LEFT JOIN '._DB_PREFIX_.'feature_product fp ON (fp.id_feature_value = fv.id_feature_value)
@@ -3327,13 +3327,13 @@ class BlockLayered extends Module
 		LEFT JOIN '._DB_PREFIX_.'category_product cp ON (cp.id_product = p.id_product)
 		LEFT JOIN '._DB_PREFIX_.'category c ON (c.id_category = cp.id_category)
 		WHERE (fv.custom IS NULL OR fv.custom = 0) AND c.active = 1'.(count($categoriesIds) ? ' AND cp.id_category IN ('.implode(',', $categoriesIds).')' : '').'
-		AND p.active = 1'.(count($productsIds) ? ' AND p.id_product IN ('.implode(',', $productsIds).')' : ''), false);
+		AND p.active = 1'.(count($productsIds) ? ' AND p.id_product IN ('.implode(',', $productsIds).')' : ''));
 
 		$featuresById = array();
 		while ($row = $db->nextRow($features))
 			$featuresById[(int)$row['id_feature_value']] = (int)$row['id_feature'];
 
-		$result = $db->ExecuteS('
+		$result = $db->query('
 		SELECT p.id_product, GROUP_CONCAT(DISTINCT fv.id_feature_value) features, GROUP_CONCAT(DISTINCT cp.id_category) categories, GROUP_CONCAT(DISTINCT pac.id_attribute) attributes
 		FROM '._DB_PREFIX_.'product p
 		LEFT JOIN '._DB_PREFIX_.'category_product cp ON (cp.id_product = p.id_product)
@@ -3344,7 +3344,7 @@ class BlockLayered extends Module
 		LEFT JOIN '._DB_PREFIX_.'product_attribute_combination pac ON (pac.id_product_attribute = pa.id_product_attribute)
 		WHERE c.active = 1'.(count($categoriesIds) ? ' AND cp.id_category IN ('.implode(',', $categoriesIds).')' : '').' AND p.active = 1'.(count($productsIds) ? '
 		AND p.id_product IN ('.implode(',', $productsIds).')' : '').' AND (fv.custom IS NULL OR fv.custom = 0)
-		GROUP BY p.id_product', false);
+		GROUP BY p.id_product');
 
 		while ($product = $db->nextRow($result))
 		{
diff --git a/modules/statsequipment/statsequipment.php b/modules/statsequipment/statsequipment.php
index 32df4cc28..a05589b92 100644
--- a/modules/statsequipment/statsequipment.php
+++ b/modules/statsequipment/statsequipment.php
@@ -63,7 +63,7 @@ class StatsEquipment extends ModuleGraph
 				LEFT JOIN `'._DB_PREFIX_.'guest` g ON g.`id_guest` = c.`id_guest`
 				WHERE c.`date_add` BETWEEN '.ModuleGraph::getDateBetween().'
 					'.$this->sqlShopRestriction(false, 'c');
-		$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($sql, false);
+		$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->query($sql);
 
 		$calcArray = array(
 			'jsOK' => 0,
diff --git a/modules/statsforecast/statsforecast.php b/modules/statsforecast/statsforecast.php
index 2c1b3325c..b4727bdbe 100644
--- a/modules/statsforecast/statsforecast.php
+++ b/modules/statsforecast/statsforecast.php
@@ -122,7 +122,7 @@ class StatsForecast extends Module
 					'.$this->sqlShopRestriction(Shop::SHARE_ORDER, 'o').'
 				GROUP BY '.$dateFromGInvoice.'
 				ORDER BY fix_date';
-		$result = $db->executeS($sql, false);
+		$result = $db->query($sql);
 
 		while ($row = $db->nextRow($result))
 			$dataTable[$row['fix_date']] = $row;
@@ -159,7 +159,7 @@ class StatsForecast extends Module
 				WHERE c.date_add BETWEEN '.ModuleGraph::getDateBetween().'
 				'.$this->sqlShopRestriction(false, 'c').'
 				GROUP BY '.$dateFromGAdd;
-		$visits = Db::getInstance()->executeS($sql, false);
+		$visits = Db::getInstance()->query($sql);
 		while ($row = $db->nextRow($visits))
 			$visitArray[$row['fix_date']] = $row['visits'];
 
@@ -172,7 +172,7 @@ class StatsForecast extends Module
 					AND o.invoice_date BETWEEN '.ModuleGraph::getDateBetween()
 					.$this->sqlShopRestriction(Shop::SHARE_ORDER, 'o').'
 				GROUP BY '.$dateFromGInvoice;
-		$discounts = Db::getInstance()->executeS($sql, false);
+		$discounts = Db::getInstance()->query($sql);
 		while ($row = $db->nextRow($discounts))
 			$discountArray[$row['fix_date']] = $row['total'];*/
 
diff --git a/modules/statsorigin/statsorigin.php b/modules/statsorigin/statsorigin.php
index 9171740e2..62bb1a70b 100644
--- a/modules/statsorigin/statsorigin.php
+++ b/modules/statsorigin/statsorigin.php
@@ -59,7 +59,7 @@ class StatsOrigin extends ModuleGraph
 				WHERE 1
 					'.$this->sqlShopRestriction().'
 					AND date_add BETWEEN '.$dateBetween;
-		$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->executeS($sql, false);
+		$result = Db::getInstance(_PS_USE_SQL_SLAVE_)->query($sql);
 		$websites = array($directLink => 0);
 		while ($row = Db::getInstance(_PS_USE_SQL_SLAVE_)->nextRow($result))
 		{