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This page contains release notes and the for the and the compatibility release matrix supported for the frevvo Database Connector:

Database ConnectorLive Forms
v2.4 Any version prior to v7.2.0

frevvo only supports/certifies the Database Connector running in the Apache Tomcat container. Refer to our Supported Platforms for the list of Application Servers and databases supported/certified by frevvo.

On This Page:

v2.5.2 (r30569)


Version 2.5.2 of the Database Connector was certified with frevvo 7.2.4 and requires Java 8. If you run the Database Connector v2.5.2 with frevvo v7.2.1, v7.2.2 or v7.2.3, logging entries for the Database Connector will be included with the frevvo logging entries in the <frevvo-home>\tomcat\frevvo_YYYY-MM-DD.logfile. If you run the Database Connector with frevvo v7.2.4, the Database Connector entries are logged separately in the <frevvo-home>\tomcat\logs\database-connector.YYYY-MM-DD logfile.

It is included in the v7.2.4+ frevvo in-house tomcat bundle. You can download the frevvo in-house software from frevvo Software Downloads Directory.  

Tickets Fixed:
  • #21139 - A third party JDBC driver to connect to Active Directory as an SQL database causes validation to fail. Drivers of this type are not supported
  • #21150 - Adding SQL Server JDBC driver to WAR causing issues for customers who already have the driver installed in the tomcat/lib directory
  • #21156 - MS SQL JDBC driver embedded in the dbconnector causing queries to not work after upgrading to version 2.5 of the Database Connector
  • #21196 - Write dbconnector logs to tomcat/logs/database-connector.YYYY-MM-dd.log instead of frevvo.log    
  • #21232 - jTDS driver does not work with DBConnector v2.5.0
  • #21279 - Log is not generated when configuration parameters are located in database.xml 
  • #21411 - <cache/> element in configuration.xml causing error

  • #21421 - Autocreate="true" does not work"

  • #21428 - Empty resultsets report "Document is null. Premature end of file" errors in the debug console when testing forms  

v2.5 (r29937)


Version 2.5 of the Database Connector was certified with frevvo 7.2.1 and requires Java 8. Anyone running an older version of frevvo should use version 2.4.

The Database Connector is included in the v7.2.1 frevvo in-house tomcat bundle. You can download frevvo the in-house software from the  frevvo Software Downloads Directory. It is also available in a separate zipfile. Click to download the standalone zipfile from the frevvo Software Downloads Directory..

One advantage to using version v2.5 of the Database Connector with v7.2.1 is that the configuration.xml is separated from the underlying infrastructure database and related credentials. Review the enhancements below for more reasons to upgrade.

  • #18166 - Batch processing of POST/Create requests. JDBC inserts are batched instead of performing individual inserts.
  • Logging improvements
  • KIOSK mode - when no configuration.xml is defined, the KIOSK mode pre-loads BIRT (ClassicModels) and myStore QuerySets with in-memory Derby databases. This will make it very easy to try out the DB Connector.
  • #19243 - Support for JSON payload from business rules when performing POSTs and PUTs.
  • #20546 - Query statements are validated when the DB Connector starts instead of when used.
  • Console prints the DB Connector version and revision number.
  • #18620 - Generating max-length for SQL Server NVARCHAR
  • #20532 - Ability to disable QuerySets and/or Querys while developing your integration.
  • #18708, #18676 - Returns blank or null in the JSON results for columns that have blank or null values..
  • The database.war is  executable.
  • The SQL Server JDBC driver is included in the Database connector war.
  • QuerySet and Query names only allow alphanumeric, dot, dash and underline characters. They must start with letters. This change makes sure that they are automatically XML and JSON friendly.
  • The driver and validationQuery attributes in <resource-def> are now optional: they will be properly inferred based on the current database.
  • The configuration.xml file is automatically picked up from the current directory where the DB Connector was launched or from ./config/configuration.xml. It can be manually set by using the frevvo.connectors.database.configuration property as before. This is specially useful when running the DB Connector standalone.
  • #9564 - Ability to generate schemas for all queries in a queryset. This makes it possible to download a single XSD for all queries at once.
Tickets Fixed:
  • #9244  - to DB connector not working from rules for URL parameters and JSON payload in POST/PUT requests.
  • #9565  -  A query with '<' sign in it does not work.
  • #12750 - DB Connector:Support PUT/POST for European Characters.
  • #13134 - Database POST fails when there is % character in one of the fields.
  • #18620 - SQLSERVER : Datatype nvarchar does not generate max-length restrictions   
  • #18207 - Errors while inserting, updating, selecting row(s) using the DB connector are simply logged and ignored: it always returns an HTTP 200 status code.
  • #19062 - MySQL column w/ timestamp datatype failing when trying to insert date/time control value.



This version is a rebuild and has the same content as the v2.3.1 connector.

v2.3.1 (r20198)


  • Retrieved data can now be cached by the connector for improved performance.
  • Status Url database/status returns current configuration information
  • All database operations now log start/stop time and a WARN if time exceeds a configured threshold
  • Using prepared statements to execute all queries for enhanced security
  • #4638 Improved logging message make diagnosing and solving database issues faster/easier.
  • #6532 Values passed to the connector that contain Url special characters such as '&' cause value truncation
  • #8123 POST Url paramenters were ignored when there was no XML document sent also
  • #8693 Status 500 returned when sending a delete request
  • #8705 Query to update same form fields twice and 2nd time returned row has NULL in one of the columns, value on form is not cleared. Old value from 1st query remained.
  • #8906 DB column NOT NULL but with a default value should not be required in the auto generated XSD schema
  • #6605 Errors are logged as INFO when they should be WARN or ERROR

v2.2 (r10466)


  • #4515 - Update is no longer run after autocreate Insert. Not needed
  • #4798 - Warn if deleteKey does not exist in the schema returned by the retrieve statement
  • #5485 - UTF-8 characters retrieved from DB causing MalformedByteSequenceException in connector

v2.1 (r9567)


  • #1466 - Column names with underscore characters sig1_name='{sig1_name}' not getting template replaced
  • #5026 - readme is out of date
  • #4648 - _mediaType=json returns JSON rather than the default XML

v2.0 (r8967)


  • Datasource definitions delegated to the container and are resolved by the connector through JNDI lookup. The resource reference is configured in the connector configuration file.
  • A single database connector instance can work with multiple databases.
  • Execute stored procedures. If the stored procedure does not have OUT parameters it is not necessary to declare the statement as a procedure.
  • It is possible to configure all Date and timestamp formats for both the database and the generated XML.
  • Hot update of the configuration file. The connector will pick up the changes within 5 seconds.
  • Parameters passed in the URL take precedence over values provided in the body of POST and PUT requests. Useful for frevvo rules.
  • Multiple statements. It is possible to execute multiple SQL statements for one URL. This is available for the "create", "update" and "delete" operations. The retrieve operation only allow one statement.


GA Release

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