COPY from a remote machine in Datastage

We are doing a POC of using Datastage with PG using ODBC.

Problem to solve:  How to load a large CSV file using COPY command.  The file is on the client machine.

A typical SQL syntax of a copy coming from a remote machine  COPY TABLE FROM STDIN WITH CSV HEADER

Question is, how to make the contents of the file available as STDIN in a SQL.  It is easy in a shell.