Class: Arel::Visitors::ToSql

Inherits:
Object
  • Object
show all
Defined in:
lib/arel_extensions/visitors/to_sql.rb

Constant Summary collapse

COMMA = 
', '

Instance Method Summary collapse

Instance Method Details

#json_value(o, v) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 606

def json_value(o,v)
  case o.type_of_node(v)
  when :string
    Arel.when(v.is_null).then(make_json_null).else(make_json_string(v))
  when :date
    s = v.format('%Y-%m-%d')
    Arel.when(s.is_null).then(make_json_null).else(make_json_string(s))
  when :datetime
    s = v.format('%Y-%m-%dT%H:%M:%S')
    Arel.when(s.is_null).then(make_json_null).else(make_json_string(s))
  when :time
    s = v.format('%H:%M:%S')
    Arel.when(s.is_null).then(make_json_null).else(make_json_string(s))
  when :nil
    make_json_null
  else
    ArelExtensions::Nodes::Cast.new([v, :string]).coalesce(make_json_null)
  end
end

#make_json_null ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 16

def make_json_null
  Arel::Nodes.build_quoted("null")
end

#make_json_string(expr) ⇒ Object

Escape properly the string expression expr. Take care of escaping.



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 8

def make_json_string expr
  Arel::Nodes.build_quoted('"') \
  + expr
      .coalesce('')
      .replace('\\','\\\\').replace('"','\"').replace("\n", '\n') \
  + '"'
end

#visit_Arel_Nodes_And(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 567

def visit_Arel_Nodes_And o, collector
  case o.children.length
  when 0
    collector << '1 = 1' # but this should not happen
  when 1
    collector = visit o.children[0], collector
  else
    collector << '('
    o.children.each_with_index { |arg, i|
      if i != 0
        collector << ') AND ('
      end
      collector = visit arg, collector
    }
    collector << ')'
  end
  collector
end

#visit_Arel_Nodes_As(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 355

def visit_Arel_Nodes_As o, collector
  if o.left.respond_to?(:alias)
    o.left.alias = nil
  end
  if o.left.is_a?(Arel::Nodes::Binary)
    collector << '('
    collector = visit o.left, collector
    collector << ')'
  else
    collector = visit o.left, collector
  end
  collector << " AS "
  collector = visit o.right, collector
  collector
end

#visit_Arel_Nodes_LessThan(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 535

def visit_Arel_Nodes_LessThan o, collector
  collector = visit o.left, collector
  collector << " < "
  visit o.right, collector
end

#visit_Arel_Nodes_NotRegexp(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 380

def visit_Arel_Nodes_NotRegexp o, collector
  collector = visit o.left, collector
  collector << " NOT REGEXP "
  collector = visit o.right, collector
  collector
end

#visit_Arel_Nodes_Or(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 587

def visit_Arel_Nodes_Or o, collector
  case o.children.length
  when 0
    collector << '1 = 0' # but this should not happen
  when 1
    collector = visit o.children[0], collector
  else
      collector << '('
      o.children.each_with_index { |arg, i|
        if i != 0
          collector << ') OR ('
        end
        collector = visit arg, collector
      }
      collector << ')'
  end
  collector
end

#visit_Arel_Nodes_Regexp(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 372

def visit_Arel_Nodes_Regexp o, collector
  collector = visit o.left, collector
  collector << " REGEXP "
  collector = visit o.right, collector
  collector
end

#visit_ArelExtensions_InsertManager_BulkValues(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 444

def visit_ArelExtensions_InsertManager_BulkValues o, collector
  collector << 'VALUES '
  row_nb = o.left.length
  o.left.each_with_index do |row, idx|
    collector << '('
    len = row.length - 1
    row.zip(o.cols).each_with_index { |(value, attr), i|
      case value
      when Arel::Nodes::SqlLiteral, Arel::Nodes::BindParam
        collector = visit value, collector
      else
        collector << quote(value, attr && column_for(attr)).to_s
      end
      collector << COMMA unless i == len
    }
    collector << (idx == row_nb-1 ? ')' : '), ')
  end
  collector
end

#visit_ArelExtensions_Nodes_Abs(o, collector) ⇒ Object

Math Functions



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 21

def visit_ArelExtensions_Nodes_Abs o, collector
  collector << "ABS("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Blank(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 252

def visit_ArelExtensions_Nodes_Blank o, collector
  # visit o.left.coalesce('').trim.length.eq(0), collector
  collector << 'LENGTH(TRIM(COALESCE('
  collector = visit o.expr, collector
  collector << COMMA
  collector = visit Arel::Nodes.build_quoted(''), collector
  collector << "))) = 0"
  collector
end

#visit_ArelExtensions_Nodes_Case(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 501

def visit_ArelExtensions_Nodes_Case o, collector
  collector << "CASE "
  if o.case
    visit o.case, collector
    collector << " "
  end
  o.conditions.each do |condition|
    visit condition, collector
    collector << " "
  end
  if o.default
    visit o.default, collector
    collector << " "
  end
  collector << "END"
end

#visit_ArelExtensions_Nodes_Case_Else(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 525

def visit_ArelExtensions_Nodes_Case_Else o, collector
  collector << "ELSE "
  visit Arel::Nodes.build_quoted(o.expr), collector
end

#visit_ArelExtensions_Nodes_Case_When(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 518

def visit_ArelExtensions_Nodes_Case_When o, collector
  collector << "WHEN "
  visit Arel::Nodes.build_quoted(o.left), collector
  collector << " THEN "
  visit Arel::Nodes.build_quoted(o.right), collector
end

#visit_ArelExtensions_Nodes_Cast(o, collector) ⇒ Object

comparators



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 294

def visit_ArelExtensions_Nodes_Cast o, collector
  collector << "CAST("
  collector = visit o.left, collector
  collector << " AS "
  case o.as_attr
  when :string
    as_attr = Arel::Nodes::SqlLiteral.new('char')
  when :int
    as_attr = Arel::Nodes::SqlLiteral.new('int')
  when :decimal, :float, :number
    as_attr = Arel::Nodes::SqlLiteral.new('float')
  when :datetime
    as_attr = Arel::Nodes::SqlLiteral.new('datetime')
  when :time
    as_attr = Arel::Nodes::SqlLiteral.new('time')
  when :binary
    as_attr = Arel::Nodes::SqlLiteral.new('binary')
  when :text, :ntext
    as_attr = Arel::Nodes::SqlLiteral.new('text')
  else
    as_attr = Arel::Nodes::SqlLiteral.new(o.as_attr.to_s)
  end
  collector = visit as_attr, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Ceil(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 31

def visit_ArelExtensions_Nodes_Ceil o, collector
  collector << "CEIL("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Coalesce(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 321

def visit_ArelExtensions_Nodes_Coalesce o, collector
  collector << "COALESCE("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Concat(o, collector) ⇒ Object

String functions



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 96

def visit_ArelExtensions_Nodes_Concat o, collector
  collector << "CONCAT("
  o.expressions.each_with_index { |arg, i|
      collector << COMMA if i != 0
      collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_DateAdd(o, collector) ⇒ Object

Date operations



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 434

def visit_ArelExtensions_Nodes_DateAdd o, collector
  collector << "DATE_ADD("
  collector = visit o.left, collector
  collector << COMMA
  collector = visit o.sqlite_value(o.right), collector
  collector << ')'
  collector
end

#visit_ArelExtensions_Nodes_DateDiff(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 331

def visit_ArelExtensions_Nodes_DateDiff o, collector
  collector << if o.left_node_type == :ruby_time || o.left_node_type == :datetime || o.left_node_type == :time
                'TIMEDIFF('
              else
                'DATEDIFF('
              end
  collector = visit o.left, collector
  collector << COMMA
  collector = visit o.right, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_DateSub(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 344

def visit_ArelExtensions_Nodes_DateSub o, collector
  collector << "DATE_SUB("
  collector = visit o.left, collector
  collector << COMMA
  collector = visit o.right, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Downcase(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 202

def visit_ArelExtensions_Nodes_Downcase o, collector
  collector << "LOWER("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_FindInSet(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 182

def visit_ArelExtensions_Nodes_FindInSet o, collector
  collector << "FIND_IN_SET("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Floor(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 41

def visit_ArelExtensions_Nodes_Floor o, collector
  collector << "FLOOR("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Format(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 272

def visit_ArelExtensions_Nodes_Format o, collector
  case o.col_type
  when :date, :datetime, :time
    collector << "STRFTIME("
    collector = visit o.right, collector
    collector << COMMA
    collector = visit o.left, collector
    collector << ")"
  when :integer, :float, :decimal
    collector << "FORMAT("
    collector = visit o.left, collector
    collector << COMMA
    collector = visit o.right, collector
    collector << ")"
  else
    collector = visit o.left, collector
  end
  collector
end

#visit_ArelExtensions_Nodes_FormattedNumber(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 530

def visit_ArelExtensions_Nodes_FormattedNumber o, collector
  visit o.left, collector
end

#visit_ArelExtensions_Nodes_GroupConcat(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 106

def visit_ArelExtensions_Nodes_GroupConcat o, collector
  collector << "GROUP_CONCAT("
  collector = visit o.left, collector
  if o.separator && o.separator != 'NULL'
    collector << COMMA
    collector = visit o.separator, collector
  end
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_IDoesNotMatch(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 397

def visit_ArelExtensions_Nodes_IDoesNotMatch o, collector
  collector = infix_value o, collector, ' NOT ILIKE '
  if o.escape
    collector << ' ESCAPE '
    collector = visit o.escape, collector
  end
  collector
end

#visit_ArelExtensions_Nodes_IMatches(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 387

def visit_ArelExtensions_Nodes_IMatches o, collector
  collector = infix_value o, collector, ' ILIKE '
  if o.escape
    collector << ' ESCAPE '
    visit o.escape, collector
  else
    collector
  end
end

#visit_ArelExtensions_Nodes_IsNotNull(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 413

def visit_ArelExtensions_Nodes_IsNotNull o, collector
    collector << "NOT ISNULL("
    collector = visit o.expr, collector
    collector << ")"
    collector
end

#visit_ArelExtensions_Nodes_IsNull(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 406

def visit_ArelExtensions_Nodes_IsNull o, collector
  collector << "ISNULL("
  collector = visit o.expr, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Json(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 626

def visit_ArelExtensions_Nodes_Json o,collector
  case o.dict
  when Array
    res = Arel::Nodes.build_quoted('[')
    o.dict.each.with_index do |v,i|
      if i != 0
        res += ', '
      end
      res += json_value(o,v)
    end
    res += ']'
    collector = visit res, collector
  when Hash
    res = Arel::Nodes.build_quoted('{')
    o.dict.each.with_index do |(k,v),i|
      if i != 0
        res += ', '
      end
      res += make_json_string(ArelExtensions::Nodes::Cast.new([k, :string])) + ': '
      res += json_value(o,v)
    end
    res += '}'
    collector = visit res, collector
  else
    collector = visit o.dict, collector
  end
  collector
end

#visit_ArelExtensions_Nodes_JsonGroup(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 655

def visit_ArelExtensions_Nodes_JsonGroup o, collector
  if o.as_array
    res = Arel::Nodes.build_quoted('[') + (o.orders ? o.dict.group_concat(', ', order: Array(o.orders)) : o.dict.group_concat(', ')).coalesce('') + ']'
    collector = visit res, collector
  else
    res = Arel::Nodes.build_quoted('{')
    orders = o.orders || o.dict.keys
    o.dict.each.with_index do |(k,v),i|
      if i != 0
        res = res + ', '
      end
      kv = make_json_string(ArelExtensions::Nodes::Cast.new([k, :string])) + ': '
      kv += json_value(o,v)
      res = res + kv.group_concat(', ', order: Array(orders)).coalesce('')
    end
    res = res + '}'
    collector = visit res, collector
  end
  collector
end

#visit_ArelExtensions_Nodes_Length(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 124

def visit_ArelExtensions_Nodes_Length o, collector
  collector << "#{o.bytewise ? '' : 'CHAR_'}LENGTH("
  collector = visit o.left, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_LevenshteinDistance(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 555

def visit_ArelExtensions_Nodes_LevenshteinDistance o, collector
  collector << "LEVENSHTEIN_DISTANCE("
  collector = visit o.left, collector
  collector << COMMA
  collector = visit o.right, collector
  collector << ')'
  collector
end

#visit_ArelExtensions_Nodes_Locate(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 131

def visit_ArelExtensions_Nodes_Locate o, collector
  collector << "LOCATE("
  collector = visit o.right, collector
  collector << COMMA
  collector = visit o.left, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Log10(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 71

def visit_ArelExtensions_Nodes_Log10 o, collector
  collector << "LOG10("
  collector = visit o.left, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Ltrim(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 232

def visit_ArelExtensions_Nodes_Ltrim o, collector
  collector << "LTRIM("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_MD5(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 117

def visit_ArelExtensions_Nodes_MD5 o, collector
  collector << "MD5("
  collector = visit o.left, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_NotBlank(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 262

def visit_ArelExtensions_Nodes_NotBlank o, collector
  # visit o.left.coalesce('').trim.length.gt(0), collector
  collector << 'LENGTH(TRIM(COALESCE('
  collector = visit o.expr, collector
  collector << COMMA
  collector = visit Arel::Nodes.build_quoted(''), collector
  collector << "))) > 0"
  collector
end

#visit_ArelExtensions_Nodes_Power(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 78

def visit_ArelExtensions_Nodes_Power o, collector
  collector << "POW("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Rand(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 51

def visit_ArelExtensions_Nodes_Rand o, collector
  collector << "RAND("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_RegexpReplace(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 161

def visit_ArelExtensions_Nodes_RegexpReplace o, collector
  collector << "REGEXP_REPLACE("
  visit o.left, collector
  collector << COMMA
  visit Arel::Nodes.build_quoted(o.pattern.to_s), collector
  collector << COMMA
  visit o.substitute, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Repeat(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 172

def visit_ArelExtensions_Nodes_Repeat o, collector
  collector << "REPEAT("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Replace(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 150

def visit_ArelExtensions_Nodes_Replace o, collector
  collector << "REPLACE("
  visit o.left, collector
  collector << COMMA
  visit o.pattern, collector
  collector << COMMA
  visit o.substitute, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Round(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 61

def visit_ArelExtensions_Nodes_Round o, collector
  collector << "ROUND("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Rtrim(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 242

def visit_ArelExtensions_Nodes_Rtrim o, collector
  collector << "RTRIM("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Soundex(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 192

def visit_ArelExtensions_Nodes_Soundex o, collector
  collector << "SOUNDEX("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Std(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 541

def visit_ArelExtensions_Nodes_Std o, collector
  collector << "STD("
  visit o.left, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Substring(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 140

def visit_ArelExtensions_Nodes_Substring o, collector
  collector << "SUBSTRING("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Sum(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 88

def visit_ArelExtensions_Nodes_Sum o, collector
  collector << "SUM("
  collector = visit o.expr, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Then(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 420

def visit_ArelExtensions_Nodes_Then o, collector
  collector << "CASE WHEN ("
  collector = visit o.left, collector
  collector << ") THEN "
  collector = visit o.right, collector
  if o.expressions[2]
    collector << " ELSE "
    collector = visit o.expressions[2], collector
  end
  collector << " END"
  collector
end

#visit_ArelExtensions_Nodes_Trim(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 222

def visit_ArelExtensions_Nodes_Trim o, collector
  collector << "TRIM("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Union(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 487

def visit_ArelExtensions_Nodes_Union o, collector
  collector = visit o.left, collector
  collector << " UNION "
  collector = visit o.right, collector
  collector
end

#visit_ArelExtensions_Nodes_UnionAll(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 494

def visit_ArelExtensions_Nodes_UnionAll o, collector
  collector = visit o.left, collector
  collector << " UNION ALL "
  collector = visit o.right, collector
  collector
end

#visit_ArelExtensions_Nodes_Upcase(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 212

def visit_ArelExtensions_Nodes_Upcase o, collector
  collector << "UPPER("
  o.expressions.each_with_index { |arg, i|
    collector << COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Variance(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 548

def visit_ArelExtensions_Nodes_Variance o, collector
  collector << "VARIANCE("
  visit o.left, collector
  collector << ")"
  collector
end