Your SQL queries are defined in configuration.xml. The database connector looks for this file in

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 logs a warning to that effect. You may notice an error message that reads "Premature end of file", similar to the image below, in the debug console when testing your forms.

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<query name="products" autocreate="true" autodelete="true" deleteKey="id">
	<retrieve>
	    <statement>
		<!-- Maps to the HTTP GET method -->
		SELECT * FROM products WHERE orderId='{orderId}'
	    </statement>                                                    
	</retrieve>
	<create> 
	    <statement>
		INSERT INTO products
		(orderId, productName, quantity,price) 
		VALUES ({orderId}, '{productName}', '{quantity}', {price})
	    </statement>
	</create>
	<update>
	    <statement>
		UPDATE products SET  productName = '{productName}', quantity = {quantity}, price = {price}                                                
		WHERE id = {id}                                                                         
	    </statement>
	</update>
	<delete>
	    <statement>
	     DELETE from products where id={id} 
	     </statement>
	</delete>
</query>

1. Note that the id column of this products table is a Primary Key/Unique column and an automatically incrementing number is assigned as value to this column (on the database side) when inserting a new record in Products table.
2. Notice the autocreate and autodelete attributes of this query. Please see Auto Create Rows above.
3. This query has all the CREATE, RETRIEVE, UPDATE, and DELETE statements declared in it.
4. To create the schema, browse the DB connector query URL with /schema appended to it. For example: http://localhost:8082/database/BIRT/products/schema?orderId=10000

5. After creating the form fields using this schema, configure the Doc Action -> Doc URI to:

   1. Read URL: http://localhost:8082/database/BIRT/products?orderId=\{orderId} with method: GET

   2. Write URL: http://localhost:8082/database/BIRT/products with method: PUT

      Info
      See this section for an explanation of how HTML statements (GET, PUT, etc.) translate to SQL statements (RETRIEVE, UPDATE, etc.)

6. Test the form. Enter a valid orderId, and notice that the form table will automatically expand and display all the order items retrieved by the SELECT statement.
   1. Add a row and enter some data.
   2. Edit another row.
   3. Delete a different row.
      
7. Submit the form. The database connector will
   1. Execute the INSERT statement for any form table row that was added.
   2. Execute the UPDATE statement for any form table row that was changed.
   3. Execute the DELETE statement for any form table row that was deleted.

Dates and Timestamps

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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

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