Tables - Opticon ESL Server Manual

Tables

7.2.1.
When using SQL, the ESL server uses 10 SQL-tables in order to work properly, which have a
couple of restrictions.

A product table containing the product information, which allows the image content on the
ESLs to be automatically generated.

A product staging table. Used to serve as the interface to add, modify and removes
products from the product table

Link table This table is automatically generated and is used to containing the links
between products and links

Link staging table. This table is automatically generated and is used as the interface to
create and remove links from the link table

LabelStatus table. This table is automatically generated and is used to store all
information about each ESL in the server. This table is described in chapter 7.2.1.5.

BaseStationStatus table. This table is automatically generated and is used to store all
information about each base station in the server. This table is described in chapter
7.2.1.6.

Logging table. This table is automatically generated and is used to store events and
alerts and exceptions to help trouble shooting in case of problems.

Users table. This table holds the users, encrypted passwords and access rights

Change log table. This table is used to log user activity.

(Optional) Product look-up table containing just bar codes and their related product ID.
It's not actually used by the ESL server application, but it's used by the included Web-app
to link products to ESLs by scanning the barcode of a product followed by the barcode on
the ESL. This table is described in chapter 7.2.1.7.
The following chapters will describe these tables in more details.
(The ESL server also creates 3 'action' tables, which are created to allow remote control over the
ESL server using SQL queries. See Appendix I: Using the SQL API.
7.2.1.1 Link table
Important note: Only the ESL server is allowed to modify this table directly. A link staging table is
used for changing the content of this table, which is described in the following chapter.
The ESL server requires a link table that contains the links between the products and ESLs.
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