...

If you are using the MySQL database, there is a special syntax to insert a conditional null in an insert statement. For Example, let's say your form/flow workflow has an optional date field in a form that is designed to insert a row into the database. The insert will fail because the database connector inserts an empty string where MySQL expects NULL.

...

1. A Doc URI - this is the simplest way but the Doc URI is only executed when a form is submitted or a flow workflow has completed it’s final step. When the user submits the form or completes the flowworkflow, the URI will be executed with the POST method selected from the dropdown. The database connector will execute the Insert operation identified by the URI.

   Code Block
   http://localhost:8082/database/BIRT/productDetails

2. A  business rule to pass the data to the database connector post using URL query parameters.  When the user clicks on the Trigger control, this rule will run and the database connector will execute the Insert operation identified by the URL in the productDetails query in the configuration.xml file..

   Code Block
   language js
   if (trigger.clicked) { var PostURL = 'http://localhost:8082/database/BIRT/productDetails?productCode=' + productCode.value + '&productName=' + productName.value + '&productLine=' + productLine.value + '&productScale=' + productScale.value + '&productVendor=' + productVendor.value + '&productDescription=' + productDescription.value + '&quantityInStock=' + quantityInStock.value + '&buyPrice=' + buyPrice.value + '&MSRP=' + MSRP.value; http.post(PostURL); }

3. A  business rule to create JSON to post/put in the http request. This method is preferred over method 2 because there is a limit to the length of the URL string which will limit the number of form fields you can pass to the Database Connector.

   Code Block
   language js
   /*member MSRP, buyPrice, productCode, productDescription, productLine, productName, productScale, productVendor, quantityInStock*/ if (trigger.clicked) { var jp = { productCode: productCode.value, productName: productName.value, productLine: productLine.value, productScale: productScale.value, productVendor: productVendor.value, productDescription: productDescription.value, quantityInStock: quantityInStock.value, buyPrice: buyPrice.value, MSRP: MSRP.value, }; http.post('http://localhost:8082/database/BIRT/productDetails', jp); }

   Let’s analyze this rule:

   • The first line of the rule is the member directive required by the Live Forms rule validator
   • Line 2 is a conditional statement to specify that the rule runs when the Trigger control is clicked
   • var jp – defines the JSON payload variable
   • The next 9 lines define the JSON payload – specify the form field values that will be written to the columns in the products table.
   • The last line specifies the http.post operation to the database connector using the JSON payload. When the user clicks on the Trigger control, the database connector will execute the Insert operation identified by the URL in the productDetails query in the configuration.xml file..

...

Behind the scenes, the connector actually compares the items in the database with what is submitted in the form. That comparison criteria is based on a key that you define with the attribute deleteKey (required). The deleteKey value is normally the name of the primary key in the table that contains the repeat items.

Dates and Timestamps

...

1. Add the enabled= attribute with a value of false to the <querySet/> or individual <query> elements in the configuration.xml file to completely disable it. The first example disables the queryset named BIRT and the second example disables the allCustomer query.

   Code Block
   title This example disables the querySet named BIRT
   <dbconnector> <queryset name="BIRT" enabled="false" ...>

   Code Block
   language sql title This example disables the querynamed allCustomers
   <queryset name="BIRT"> <query name="allCustomers" autocreate="true" enabled="false" > <retrieve> <!-- maps to HTTP GET --> <statement> SELECT customerNumber,customerName from Customers order by customerName </statement> </retrieve> </query>

2. The same can be done by adding the enabled property with a value of false as shown below to the dbconnector.properties in the standalone or tomcat bundles.  

   Code Block
   dbconnector.queryset@<queryset name>.enabled=false

   This property disables all querysets. Add it to the dbconnector.properties(standalone bundle) or frevvo-config.properties (tomcat bundle).

   Code Block
   dbconnector.queryset.enabled=false

...