add
Adds a raw/custom column backed by an arbitrary SQL expression.
Return
The created column
Parameters
expression
The SQL expression (e.g., "SUM(amount)", "COALESCE(a, b)")
type
The column type, which determines how filter values are interpreted. Defaults to Facet.Type.TEXT.
Adds a raw/custom column with a custom Converter. The converter receives the column expression and the user's filter value, and returns a SQL fragment while staging bind parameters via SqlArgsCollector.