Class: ConceptQL::Operators::After

Inherits:
TemporalOperator show all
Defined in:
lib/conceptql/operators/after.rb

Instance Attribute Summary

Attributes inherited from BinaryOperatorOperator

#left

Attributes inherited from Operator

#arguments, #errors, #nodifier, #options, #upstreams, #values

Instance Method Summary collapse

Methods inherited from TemporalOperator

#add_occurrences_condition, #add_option_conditions, #add_within_condition, #inclusive?, #left_stream, #query, #within_check_after?, #within_check_before?, #within_column, within_skip

Methods inherited from BinaryOperatorOperator

#code_list, #display_name, #upstreams

Methods inherited from Operator

#annotate, #cast_column, #code_list, codes_should_match, #columns, #create_upstreams, #data_model, #database_type, default_query_columns, #domains, #dup_values, #dynamic_columns, #evaluate, inherited, #initialize, #inspect, #label, new, #operator_name, #optimized, query_columns, register, require_column, #required_columns, #scope, #select_it, #setup_select, #sql, #stream, #to_op, #unionable?, #upstreams_valid?, #valid?

Methods included from Metadatable

#allows_many_upstreams, #allows_one_upstream, #argument, #auto_label, #basic_type, #category, #derive_metadata_from_validations, #desc, #domains, #get_desc, #humanized_class_name, #inherited, #just_class_name, #no_desc, #option, #predominant_domains, #pref_name, #preferred_name, #reset_categories, #standard_description, #to_metadata, #validate_at_least_one_upstream_to_metadata, #validate_at_most_one_upstream_to_metadata, #validate_no_arguments_to_metadata, #validate_no_upstreams_to_metadata, #validate_one_upstream_to_metadata, #validate_required_options_to_metadata, #warn_about_missing_metadata

Constructor Details

This class inherits a constructor from ConceptQL::Operators::Operator

Instance Method Details

#compare_all? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/conceptql/operators/after.rb', line 36

def compare_all?
  !(options.keys & [:within, :at_least, :occurrences]).empty?
end

#occurrences_column ⇒ Object 



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# File 'lib/conceptql/operators/after.rb', line 28

def occurrences_column
  :end_date
end

#right_stream(db) ⇒ Object 



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# File 'lib/conceptql/operators/after.rb', line 20

def right_stream(db)
  unless compare_all?
    right.evaluate(db).from_self.group_by(:person_id).select(:person_id, Sequel.function(:min, :end_date).as(:end_date)).as(:r)
  else
    right.evaluate(db).from_self.as(:r)
  end
end

#where_clause ⇒ Object 



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# File 'lib/conceptql/operators/after.rb', line 32

def where_clause
  Proc.new { l__start_date > r__end_date }
end