Drop Work Table

1. Purpose of the Task:
• The Drop Work Table task is responsible for dropping the loading table in the target database once it has been used in the data integration process.
• The loading table is typically a temporary table (e.g., prefixed with "C$") that holds data before it is transformed and loaded into the final target tables.
2. Execution of the Task:
• This task is always executed at the end of the loading phase, regardless of whether the loading table exists or not.
• It is essential to clean up the environment after the data has been loaded, preventing unnecessary tables from lingering in the database.
3. Handling Errors:
• The Ignore Errors flag is activated for this task. This means that the task will not halt the execution of the process if the loading table is not found in the target database.
• If the loading table is already dropped or never created, the task will simply proceed without causing an error.
4. Command on Target:
• The specific command used to drop the loading table in the target database is a SQL DROP TABLE statement.
• The command will dynamically reference the loading table based on the configuration:

5.  drop table <%=snpRef.getTable("L", "COLL_NAME", "A")%>

• Here:
• <%=snpRef.getTable("L", "COLL_NAME", "A")%> dynamically generates the name of the loading table. It references the mapping or session context to determine the correct table to drop.
• COLL_NAME refers to the collection name or a parameter used to determine the target table.
5. Key Points:
• Always executed: The task runs as part of the final steps in the integration process.
• Ignore Errors: Ensures that the process continues even if the table is missing or already dropped.
• Cleanup: It is used for clean-up by removing temporary tables (loading tables) after the data is moved to the target system.