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Result = $calc_date(date, value [, unit [, options])
… no options at this time
$calc_date( <date_column_spec | 'date_string' > , value_expression [, date_unit [, options ] )
An expression resulting in date-class or string-class datatype.
An expression resulting in a numeric-class (integer or floating point) value.
Negative values supported. date_unit A string containing unit abbreviation
There are no options currently for this function.