You can add to and modify ESQL code that you have created in an ESQL file.
To complete this task, you must have created an ESQL file, as described in Creating an ESQL file.
To open an existing ESQL file, complete the following steps.
You can also open an ESQL file when you have a message flow open in the editor view by right-clicking an appropriate node (a Compute, Database, DatabaseInput, or Filter node), then clicking Open ESQL. In this case, the ESQL file that contains this module is opened, and the module for the selected node is highlighted in the editor view.