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Shell Script Uses Named Pipe to Track Table Export Progress

DEV Community •
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DEV Community shares a concise shell script that leverages a named pipe, counter.fifo, to monitor the progress of bulk table exports using the bcpOUTToDir command. The script initializes two counters, t for total tables processed and b for failures, and updates them in real time by writing increment commands to the pipe. As each table name is read from TABLE_NAME_FILE, the script triggers a BCP OUT operation, logs the table name, and, upon failure, increments the failure counter.

After all tables are processed, the script outputs the total number of tables and the number of failures, then cleans up by terminating the counter process and removing the FIFO. This approach provides DBAs and data engineers with a lightweight, real‑time audit trail of export operations without requiring external monitoring tools. By automating error detection and reporting, teams can quickly identify problematic tables, reduce manual oversight, and improve overall data pipeline reliability.

The method is especially valuable in environments with large data warehouses or frequent schema changes, where timely feedback on export success is critical.