Rich SQL - data visualisation extension for SQL

This is the short specification of Rich SQL language extension implemnted by SQL Tabs.

Estension of SQL scripts for declaring the way obtained results have to be presented.

SQL script can be split to blocks by a comment line started with 3 dashes: ---

Each block can be annotated with a preffered way of representation:

--- <annotation> <options>

Annotations:

--- table

Represent a result as a standard table

--- crosstable

Represent a result as a crosstable. By default the first column is taken as a vertical axis, the second columns as horizontal axis, the rest of the columns as cross table values.

--- chart <chart_type> <options>

Represent a result as a chart of a chart_type.

Chart types:

- area
- area-spline
- area-step
- bar
- donut
- line
- pie
- spline
- step

--- hidden

Do not represent a result at all.

--- id

ID of a script. Should be defined once per script. Serves for storing results in a further systems. ID supposed to uniquely identify a file/document in a system.

--- every <options>

If a script supposed to be run regulary defines a schedule of execution. (a la cron) The specification of a schedule to be defined.

--- map <options>

Represent result on a geographical map. Options to be defined.

/** <markdown> **/

Text within /** **/ block is interpreted as a static markdown markup to be displayed together with a result.