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.
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.