How to add a select all option to select component in CDE

Question

for a students projects we are working with Pentaho CDE to create a dashboard. At first it works fine, but now we are hanging at the point adding more than one Select Component.

Answer 1

Use SQL expression CASE:

SELECT * FROM table WHERE cities LIKE (case when ${city} = 'ALL' then '%' ELSE ${city} end)

Answer 2

If you dont want use like.

SELECT * from table_name where column_name = case when ${param} = 'ALL' then column_name else ${param} end

Answer 3

Two approaches:

1. On your single select query add (possibly hardcoding) a "All" option and have some JS logic learn how to handle it;

2. Use multi select components. However, bear in mind that the parameter values on a multi select component are stored as an array in javascript, whereas the parameter value will be passed as a comma separated list to the query. So, if you want to use a multi select parameter in a SQL query you will most likely use it inside a IN condition.

Finally, check your pentaho.log file. The errors and exceptions will be logged there.