How to import data from external systems or databases
The CLI can be used to import data into Jira from external systems either dynamically or as a one time load. Various techniques are available.
Scripting and executing various individual CLI actions depending on the data
Scripting to produce a run file of action then using the run action
Creating a CSV file from an external source with or without modifications using a script and then using runFromCsv action
Constructing one or more SQL statements and using runFromSql action
More information and examples are needed here! Until more documentation is available, see the release notes