Appendix I: Using The Sql Api - Opticon ESL Server Manual

Appendix I: Using the SQL API

SQL queries can be used as API to create your own application by executing SQL queries to control
and monitor the ESL system, while running the ESL server as background service (See chapter 12
on how run the ESL server as service).
See chapter 7.2 for information on how to use the product and link staging tables to update ESLs
and status tables to monitor the ESL system remotely.
Besides the SQL tables described in chapter 7.2, the ESL server also automatically creates the
following 3 SQL tables to allow control over the ESL server using SQL queries.

Actions_staging: Staging table used to insert new actions that need to be executed.

Actions_pending: Actions that involve commands that need to be send to ESLs are moved from the
staging table to this table to indicate that the command is queued and will be sent as soon as the ESL
wakes up.

Actions_results: All actions that have immediate result will be moved from the staging table to this
table. This includes base station commands and failed ESL commands.
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