Class: DDQL::TokenType::SubQueryExpression

Inherits:
DDQL::TokenType show all
Defined in:
lib/ddql/token_type.rb

Constant Summary

Constants inherited from DDQL::TokenType

ALL, CURRENCY_LITERAL, FACTOR, FACTOR_PATTERN, INFIXOPERATOR, INTEGER_LITERAL, LBRACE, LPAREN, NESTED_CLOSER, NESTED_CLOSE_PATTERN, NESTED_OPENER, NESTED_OPEN_PATTERN, NUMERIC_LITERAL, POSTFIXOPERATOR, PREFIXOPERATOR, RBRACE, RPAREN, SCI_NUM_LITERAL, SCREEN, SPECIAL_MARKER, STRING_LITERAL, SUB_Q_ALIAS, SUB_Q_EXPR, SUB_Q_FIELDS, SUB_Q_GROUP, SUB_Q_TYPE, WHITESPACE

Instance Attribute Summary

Attributes inherited from DDQL::TokenType

#label, #name, #pattern

Instance Method Summary collapse

Methods inherited from DDQL::TokenType

#==, all_types_pattern, #comparison?, #data_from, #expression?, #factor?, #group?, #infix?, #interpret, #interpreted_data_from, #literal?, #match?, #postfix?, #prefix?, #screen?, #skipping!, #supports_post_processing?, #trimming!

Constructor Details

#initialize ⇒ SubQueryExpression

Returns a new instance of SubQueryExpression.



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# File 'lib/ddql/token_type.rb', line 503

def initialize
  super(name: :sub_query_expression, pattern: /expression:\s*(?<sub_query_expression>[^\{\}#{Regexp.escape(TokenType::NESTED_OPEN_PATTERN)}#{Regexp.escape(TokenType::NESTED_CLOSE_PATTERN)}]{5,})\s*,?\s*/)
end

Instance Method Details

#as_hash(data) ⇒ Object 



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# File 'lib/ddql/token_type.rb', line 507

def as_hash(data)
  {name => data}
end

#parse(parser, token, expression: nil) ⇒ Object 



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# File 'lib/ddql/token_type.rb', line 511

def parse(parser, token, expression: nil)
  data = token.data.strip
  if data.start_with? TokenType::NESTED_OPEN_PATTERN
    sub_data = data[1..(data.index(TokenType::NESTED_CLOSE_PATTERN))]
    data = parser.class.parse sub_data
  end

  if expression.nil? || expression.keys != i[agg sub_query_fields sub_query_type]
    as_hash(data).merge parser.parse
  else
    expression.merge(as_hash(data))
  end
end