![]() The resulting Order size column created using a custom expression. Writing a custom expression in the notebook editor.įigure 2 shows the resulting table, with our new custom column on the right: Fig. It is not possible to use the Null constant in Custom Column/ Custom Expression builder making it hard to work accurately with Distinct (case(condition,identifier,Null)) or Sum (case(condition,identifier,Null)) or Average(case(condition,identifier,Null)). The example below shows the creation of a custom column that categorizes Orders according to their Subtotal using the case function. You can write custom expressions to create custom columns, or to create more advanced filters and aggregations. ![]() You can include custom expressions in questions asked via Metabase’s query builder.Ĭustom expressions give those GUI questions more power and flexibility, without requiring you to write a full SQL query. Hello, Is there any way to check if empty in custom expressions When i check if a field is different from some value, it exclude null values too. SELECT ‘Free’, count(location) FROM warehouse WHERE palletid IS NULL. case(isnull(Product ID), 'true', 'false')should work. There is a workaround proposed by flamberin the thread. Custom expressions give those GUI questions more power and flexibility, without. You can include custom expressions in questions asked via Metabase’s query builder. ![]() A custom expression in Metabase is a formula that uses functions and mathematical operators to allow for more complicated questions, similar to a formula in spreadsheet software. You are probably hitting Custom Columns does not accept boolean expression result Issue 15922 metabase/metabase GitHub. A custom expression in Metabase is a formula that uses functions and mathematical operators to allow for more complicated questions, similar to a formula in spreadsheet software. ![]()
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