MAGETWO-44555: Exception in Advanced Search if used special symbols

 - Fixed bug

Author: aohorodnyk

app/code/Magento/CatalogSearch/Model/Advanced/Request/Builder.php

@@ -27,7 +27,7 @@ public function bindRequestValue($attributeCode, $attributeValue)
         } elseif (!is_array($attributeValue)) {
             $this->bind($attributeCode, $attributeValue);
         } elseif (isset($attributeValue['like'])) {
-            $this->bind($attributeCode, trim($attributeValue['like'], '%'));
+            $this->bind($attributeCode, $attributeValue['like']);
         } elseif (isset($attributeValue['in'])) {
             $this->bind($attributeCode, $attributeValue['in']);
         } elseif (isset($attributeValue['in_set'])) {

app/code/Magento/CatalogSearch/Model/ResourceModel/Advanced.php

@@ -81,7 +81,7 @@ public function prepareCondition($attribute, $value)
         } else {
             if (strlen($value) > 0) {
                 if (in_array($attribute->getBackendType(), ['varchar', 'text', 'static'])) {
-                    $condition = ['like' => '%' . $value . '%']; // text search
+                    $condition = ['like' => $value]; // text search
                 } else {
                     $condition = $value;
                 }

lib/internal/Magento/Framework/DB/Helper/Mysql/Fulltext.php

@@ -68,6 +68,8 @@ public function getMatchQuery($columns, $expression, $mode = self::FULLTEXT_MODE
 
         $expression = $this->connection->quote($expression);
 
+        $expression = str_replace('%', '\\%', $expression);
+
         $condition = self::MATCH . " ({$columns}) " . self::AGAINST . " ({$expression} {$mode})";
         return $condition;
     }

lib/internal/Magento/Framework/Search/Request/Cleaner.php

@@ -90,7 +90,8 @@ private function cleanQuery($queryName)
                 }
                 break;
             case QueryInterface::TYPE_MATCH:
-                if (preg_match('/\$(.+)\$/si', $query['value'], $matches)) {
+                if (preg_match('/\$(.+)\$/si', $query['value'], $matches)
+                    && !preg_match('/^\$+$/si', $query['value'], $matches)) {
                     unset($this->requestData['queries'][$queryName]);
                 }
                 break;