diff --git a/SeedDMS_Core/Core/inc.ClassDMS.php b/SeedDMS_Core/Core/inc.ClassDMS.php
index 35a3d7bb4..53d4f7880 100644
--- a/SeedDMS_Core/Core/inc.ClassDMS.php
+++ b/SeedDMS_Core/Core/inc.ClassDMS.php
@@ -1386,25 +1386,9 @@ class SeedDMS_Core_DMS {
 		$totalDocs = 0;
 		if($mode & 0x1) {
 			$searchKey = "";
-			$searchFields = array();
-			if (in_array(1, $searchin)) {
-				$searchFields[] = "`tblDocuments`.`keywords`";
-			}
-			if (in_array(2, $searchin)) {
-				$searchFields[] = "`tblDocuments`.`name`";
-			}
-			if (in_array(3, $searchin)) {
-				$searchFields[] = "`tblDocuments`.`comment`";
-				$searchFields[] = "`tblDocumentContent`.`comment`";
-			}
-			if (in_array(4, $searchin)) {
-				$searchFields[] = "`tblDocumentAttributes`.`value`";
-				$searchFields[] = "`tblDocumentContentAttributes`.`value`";
-			}
-			if (in_array(5, $searchin)) {
-				$searchFields[] = "`tblDocuments`.`id`";
-			}
 
+			$classname = $this->classnames['document'];
+			$searchFields = $classname::getSearchFields($searchin);
 
 			if (count($searchFields)>0) {
 				foreach ($tkeys as $key) {
@@ -2878,7 +2862,7 @@ class SeedDMS_Core_DMS {
 	function getStatisticalData($type='') { /* {{{ */
 		switch($type) {
 			case 'docsperuser':
-				$queryStr = "select b.`fullname` as `key`, count(`owner`) as total from `tblDocuments` a left join `tblUsers` b on a.`owner`=b.`id` group by `owner`";
+				$queryStr = "select b.`fullName` as `key`, count(`owner`) as total from `tblDocuments` a left join `tblUsers` b on a.`owner`=b.`id` group by `owner`";
 				$resArr = $this->db->getResultArray($queryStr);
 				if (!$resArr)
 					return false;
@@ -2930,7 +2914,7 @@ class SeedDMS_Core_DMS {
 				}
 				return $resArr;
 			case 'sizeperuser':
-				$queryStr = "select c.`fullname` as `key`, sum(`fileSize`) as total from `tblDocuments` a left join `tblDocumentContent` b on a.id=b.`document` left join `tblUsers` c on a.`owner`=c.`id` group by a.`owner`";
+				$queryStr = "select c.`fullName` as `key`, sum(`fileSize`) as total from `tblDocuments` a left join `tblDocumentContent` b on a.id=b.`document` left join `tblUsers` c on a.`owner`=c.`id` group by a.`owner`";
 				$resArr = $this->db->getResultArray($queryStr);
 				if (!$resArr)
 					return false;
diff --git a/SeedDMS_Core/Core/inc.ClassDocument.php b/SeedDMS_Core/Core/inc.ClassDocument.php
index 994f92dfa..c30af4148 100644
--- a/SeedDMS_Core/Core/inc.ClassDocument.php
+++ b/SeedDMS_Core/Core/inc.ClassDocument.php
@@ -228,6 +228,37 @@ class SeedDMS_Core_Document extends SeedDMS_Core_Object { /* {{{ */
 		$this->_content = null;
 	} /* }}} */
 
+	/**
+	 * Return an array of database fields which used for searching
+	 * a term entered in the database search form
+	 *
+	 * @param array $searchin integer list of search scopes (2=name, 3=comment,
+	 * 4=attributes)
+	 * @return array list of database fields
+	 */
+	public static function getSearchFields($searchin) { /* {{{ */
+		$searchFields = array();
+		if (in_array(1, $searchin)) {
+			$searchFields[] = "`tblDocuments`.`keywords`";
+		}
+		if (in_array(2, $searchin)) {
+			$searchFields[] = "`tblDocuments`.`name`";
+		}
+		if (in_array(3, $searchin)) {
+			$searchFields[] = "`tblDocuments`.`comment`";
+			$searchFields[] = "`tblDocumentContent`.`comment`";
+		}
+		if (in_array(4, $searchin)) {
+			$searchFields[] = "`tblDocumentAttributes`.`value`";
+			$searchFields[] = "`tblDocumentContentAttributes`.`value`";
+		}
+		if (in_array(5, $searchin)) {
+			$searchFields[] = "`tblDocuments`.`id`";
+		}
+
+		return $searchFields;
+	} /* }}} */
+
 	public static function getInstance($id, $dms) { /* {{{ */
 		$db = $dms->getDB();
 
@@ -257,7 +288,6 @@ class SeedDMS_Core_Document extends SeedDMS_Core_Object { /* {{{ */
 		return $document;
 	} /* }}} */
 
-
 	/*
 	 * Return the directory of the document in the file system relativ
 	 * to the contentDir
@@ -1836,7 +1866,7 @@ class SeedDMS_Core_Document extends SeedDMS_Core_Object { /* {{{ */
 	function __getLatestContent() { /* {{{ */
 		if (!$this->_latestContent) {
 			$db = $this->_dms->getDB();
-			$queryStr = "SELECT * FROM `tblDocumentContent` WHERE `document` = ".$this->_id." ORDER BY `version` DESC LIMIT 0,1";
+			$queryStr = "SELECT * FROM `tblDocumentContent` WHERE `document` = ".$this->_id." ORDER BY `version` DESC LIMIT 1";
 			$resArr = $db->getResultArray($queryStr);
 			if (is_bool($resArr) && !$resArr)
 				return false;
diff --git a/SeedDMS_Core/Core/inc.DBAccessPDO.php b/SeedDMS_Core/Core/inc.DBAccessPDO.php
index 9271f1d57..18f64c2de 100644
--- a/SeedDMS_Core/Core/inc.DBAccessPDO.php
+++ b/SeedDMS_Core/Core/inc.DBAccessPDO.php
@@ -426,7 +426,7 @@ class SeedDMS_Core_DatabaseAccess {
 		elseif (!strcasecmp($tableName, "ttcontentid")) {
 			switch($this->_driver) {
 				case 'sqlite':
-					$queryStr = "CREATE TEMPORARY TABLE `ttcontentid` AS ".
+					$queryStr = "CREATE TEMPORARY TABLE IF NOT EXISTS `ttcontentid` AS ".
 						"SELECT `tblDocumentContent`.`document` AS `document`, ".
 						"MAX(`tblDocumentContent`.`version`) AS `maxVersion` ".
 						"FROM `tblDocumentContent` ".
@@ -434,7 +434,7 @@ class SeedDMS_Core_DatabaseAccess {
 						"ORDER BY `tblDocumentContent`.`document`";
 					break;
 				default:
-					$queryStr = "CREATE TEMPORARY TABLE `ttcontentid` (PRIMARY KEY (`document`), INDEX (`maxVersion`)) ".
+					$queryStr = "CREATE TEMPORARY TABLE IF NOT EXISTS `ttcontentid` (PRIMARY KEY (`document`), INDEX (`maxVersion`)) ".
 						"SELECT `tblDocumentContent`.`document`, ".
 						"MAX(`tblDocumentContent`.`version`) AS `maxVersion` ".
 						"FROM `tblDocumentContent` ".