diff --git a/SeedDMS_Core/Core/inc.DBAccessPDO.php b/SeedDMS_Core/Core/inc.DBAccessPDO.php
index 19ae61706..95935ca4b 100644
--- a/SeedDMS_Core/Core/inc.DBAccessPDO.php
+++ b/SeedDMS_Core/Core/inc.DBAccessPDO.php
@@ -88,10 +88,15 @@ class SeedDMS_Core_DatabaseAccess {
 	private $_ttcontentid;
 
 	/**
-	 * @var boolean set to true if temp. table for doc content has been created
+	 * @var boolean set to true if temp. table for doc reception has been created
 	 */
 	private $_ttreceiptid;
 
+	/**
+	 * @var boolean set to true if temp. table for doc revision has been created
+	 */
+	private $_ttrevisionid;
+
 	/**
 	 * @var boolean set to true if in a database transaction
 	 */
@@ -157,6 +162,7 @@ class SeedDMS_Core_DatabaseAccess {
 		$this->_ttstatid = false;
 		$this->_ttcontentid = false;
 		$this->_ttreceiptid = false;
+		$this->_ttrevisionid = false;
 		$this->_debug = false;
 	} /* }}} */
 
@@ -341,7 +347,7 @@ class SeedDMS_Core_DatabaseAccess {
 			}
 			return $this->_ttreviewid;
 		}
-		else if (!strcasecmp($tableName, "ttapproveid")) {
+		elseif (!strcasecmp($tableName, "ttapproveid")) {
 			switch($this->_driver) {
 				case 'sqlite':
 					$queryStr = "CREATE TEMPORARY TABLE IF NOT EXISTS `ttapproveid` AS ".
@@ -374,7 +380,7 @@ class SeedDMS_Core_DatabaseAccess {
 			}
 			return $this->_ttapproveid;
 		}
-		else if (!strcasecmp($tableName, "ttstatid")) {
+		elseif (!strcasecmp($tableName, "ttstatid")) {
 			switch($this->_driver) {
 				case 'sqlite':
 					$queryStr = "CREATE TEMPORARY TABLE IF NOT EXISTS `ttstatid` AS ".
@@ -407,7 +413,7 @@ class SeedDMS_Core_DatabaseAccess {
 			}
 			return $this->_ttstatid;
 		}
-		else if (!strcasecmp($tableName, "ttcontentid")) {
+		elseif (!strcasecmp($tableName, "ttcontentid")) {
 			switch($this->_driver) {
 				case 'sqlite':
 					$queryStr = "CREATE TEMPORARY TABLE `ttcontentid` AS ".
@@ -473,6 +479,39 @@ class SeedDMS_Core_DatabaseAccess {
 			}
 			return $this->_ttreceiptid;
 		}
+		elseif (!strcasecmp($tableName, "ttrevisionid")) {
+			switch($this->_driver) {
+				case 'sqlite':
+					$queryStr = "CREATE TEMPORARY TABLE IF NOT EXISTS `ttrevisionid` AS ".
+						"SELECT `tblDocumentRevisionLog`.`revisionID`, ".
+						"MAX(`tblDocumentRevisionLog`.`revisionLogID`) AS `maxLogID` ".
+						"FROM `tblDocumentRevisionLog` ".
+						"GROUP BY `tblDocumentRevisionLog`.`revisionID` ".
+						"ORDER BY `maxLogID`";
+				break;
+				default:
+					$queryStr = "CREATE TEMPORARY TABLE IF NOT EXISTS `ttrevisionid` (PRIMARY KEY (`revisionID`), INDEX (`maxLogID`)) ".
+						"SELECT `tblDocumentRevisionLog`.`revisionID`, ".
+						"MAX(`tblDocumentRevisionLog`.`revisionLogID`) AS `maxLogID` ".
+						"FROM `tblDocumentRevisionLog` ".
+						"GROUP BY `tblDocumentRevisionLog`.`revisionID` ".
+						"ORDER BY `maxLogID`";
+			}
+			if (!$this->_ttrevisionid) {
+				if (!$this->getResult($queryStr))
+					return false;
+				$this->_ttrevisionid=true;
+			}
+			else {
+				if (is_bool($override) && $override) {
+					if (!$this->getResult("DELETE FROM `ttrevisionid`"))
+						return false;
+					if (!$this->getResult($queryStr))
+						return false;
+				}
+			}
+			return $this->_ttrevisionid;
+		}
 		return false;
 	} /* }}} */