RDB-Delete method
Use this method to delete a row or rows from an external relational database using
SQL. This method operates in conjunction with an SQL statement in the
Delete
tab of a Connect SQL rule (Rule-Connect-SQL rule type) that
contains the
DELETE,
TRUNCATE
or
DROP
SQL
statement.
On the Delete tab of the Connect SQL rule, use the special data syntax described in Connect SQL rules — Data mapping.
Use Connect SQL rules and the RDB-Delete method only with an external database. Do not use Connect SQL rules or RDB- methods to update the PegaRULES database. Because not all properties in the Pega Platform databases are exposed as distinct database columns, use the Obj-Open and Obj-Save methods, not the similar RDB- methods, with the PegaRULES database to prevent loss of data.
Parameters
This method has four parameters. Three required parameters together identify a Connect SQL rule. The final parameter controls a processing option.
| Parameter | Description |
|---|---|
| ClassName |
Identify the class of the step page. The system uses this value as the
Applies To
key part of the Connect SQL rule that defines
the delete.
Note: Identify the exact class of the rule. The system does not use
class inheritance to find the Connect SQL rule.
|
| RequestType | Enter the third key part — Request Type — of the Connect SQL rule containing the delete operation. |
| Access |
Enter the second key part —
Package Name
— of the
Connect SQL rule (by convention
MSSQL,
Oracle,
Db2,
UDB, or
Sybase, but not
restricted to these values).
|
| RunInParallel |
Select if you want processing for the connector to continue in a separate
requestor, in parallel with the current requestor.
Clear if you want processing in this requestor session to pause until the connector processing completes. If selected, use the Connect-Wait method later in the current or a later activity to access results from the connector. |
Results
This method first retrieves the Connect SQL rule identified by the first three parameters, using rule resolution.
It accesses the SQL text in the Delete tab of that rule and converts any property, class, or table references in the context of the current clipboard.
It sends the resulting SQL to the external database, which performs the deletions.
When the RunInParallel box is selected, the SQL operation occurs in a new requestor session. This temporary requestor has the same access group and clipboard as the original. At most 10 such child requestor sessions can be active at once.
Each RDB-Open, RDB-Save, and RDB-Commit method involves an SQL database commit operation. You cannot implement SQL transaction commit operations across multiple Connect SQL rules.
Checking the method status
This method updates the pxMethodStatus property. See How to test method results using a transition.
When a {SQLPage:pagename} directive appears as the first line of the SQL code on the Delete tab, a top-level page named pagename is created. If errors occur, properties on that page contain additional error details. (When RunInParallel is selected, this page is not available to the original requestor.)