Cannot provide a set as input parameter for UDO

[antonio-olleros]

Issue Description

It is possible to define a UDO like this:

define operator test_set(ds dataset, set1 set, scalar1 string)
    returns dataset is
      ds
        [filter comp in set1]
end operator;

But then, when trying to invoke it:

B:= test_set(DS, {"a", "b"});

I get a grammar error:

 offendingSymbol: [@30,125:125='{',<5>,5:17] 
 msg: extraneous input '{' expecting {'(', '+', '-', 'eval', 'if', 'current_date', 'not', 'between', 'null', 'isnull', 'union', 'symdiff', 'intersect', 'check', 'exists_in', 'min', 'max', 'abs', 'ln', 'log', 'trunc', 'round', 'power', 'mod', 'length', 'trim', 'upper', 'lower', 'substr', 'sum', 'avg', 'median', 'count', 'exp', 'match_characters', 'nvl', 'hierarchy', '_', 'ltrim', 'rtrim', 'instr', 'replace', 'ceil', 'floor', 'sqrt', 'setdiff', 'stddev_pop', 'stddev_samp', 'var_pop', 'var_samp', 'first_value', 'last_value', 'lag', 'lead', 'ratio_to_report', 'fill_time_series', 'flow_to_stock', 'stock_to_flow', 'timeshift', 'inner_join', 'left_join', 'cross_join', 'full_join', 'period_indicator', 'time_agg', 'cast', 'check_datapoint', 'check_hierarchy', INTEGER_CONSTANT, NUMBER_CONSTANT, BOOLEAN_CONSTANT, STRING_CONSTANT, IDENTIFIER} 

Proposed Solution

Correct grammar to allow invoking UDO with set