PostgreSQL Delete

Use this activity to execute an SQL Delete to delete the record and return the information based on the returning clause specified in the delete query.

Settings

The Settings tab has the following field:

Field Description
Connection Name of the PostgreSQL database connection from where information is retrieved. You can select the connection from the Connection drop-down list.

Input Settings

The Input Settings tab has the following fields:

Field Description
Delete An SQL statement used to delete the record from the table. You can construct prepared SQL queries by using substitution variables (or parameters) of the form ?<fieldname> in the query statement.

Each substitution variable identifies an input parameter whose mapped value is substituted into the substitution variable at runtime. Input and Output tabs are populated based on the query.

End the query with semicolon (;) to fetch the metadata in the table at the bottom of the query.

The following example represents a typical delete query: 

Delete from student where name = ?name returning id;

For the above delete query, output field is generated for id from the returning clause and input field is generated for name (VARCHAR). In addition, the mapped value for the field name is substituted into the substitution variable ?name.

Manually Configure Metadata Set the Manually Configure Metadata field to True to fetch table metadata manually. For more information, see Manually Configure Metadata.
Fields The grid is provided for informational purposes only.

Input

This tab displays the input schema of the activity as a tree structure. The information in the schema varies based on the delete query provided. The fields that are selected on the Input Settings tab are available in the schema. You can either hard code the values or map them to a field from the output of a preceding activity in the flow using the Mapper.

Output

The Delete activity returns the number of rows affected by the query.

Retry on Error

Field Description
Count Maximum number of attempts to retry activity if it fails during the execution.
Interval

Time interval between the activity retry attempts. The time interval is given in milliseconds.