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 627

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 22

def make_json_null
  Arel.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.quoted('"') \
  + expr
      .coalesce('')
      .replace('\\', '\\\\')
      .replace('"', '\"')
      .replace("\b", '\b')
      .replace("\f", '\f')
      .replace("\n", '\n')
      .replace("\r", '\r')
      .replace("\t", '\t') \
  + '"'
end

#visit_Arel_Nodes_And(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 588

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 376

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 556

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 401

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 608

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 393

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 465

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 27

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 258

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.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 522

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 546

def visit_ArelExtensions_Nodes_Case_Else o, collector
  collector << 'ELSE '
  visit Arel.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 539

def visit_ArelExtensions_Nodes_Case_When o, collector
  collector << 'WHEN '
  visit Arel.quoted(o.left), collector
  collector << ' THEN '
  visit Arel.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 320

def visit_ArelExtensions_Nodes_Cast o, collector
  as_attr =
    case o.as_attr
    when :binary                   then 'binary'
    when :datetime                 then 'datetime'
    when :decimal, :float, :number then 'float'
    when :int                      then 'int'
    when :string                   then 'char'
    when :text, :ntext             then 'text'
    when :time                     then 'time'
    else                           o.as_attr.to_s
    end

  collector << 'CAST('
  collector = visit o.left, collector
  collector << ' AS '
  collector = visit Arel::Nodes::SqlLiteral.new(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 37

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 341

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 102

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 455

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 351

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 365

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 208

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 188

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 47

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 278

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_FormattedDate(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/to_sql.rb', line 298

def visit_ArelExtensions_Nodes_FormattedDate 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 551

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 112

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 418

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 408

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 434

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 427

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 647

def visit_ArelExtensions_Nodes_Json o, collector
  case o.dict
  when Array
    res = Arel.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.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 676

def visit_ArelExtensions_Nodes_JsonGroup o, collector
  if o.as_array
    res =
      Arel.quoted('[') \
      + (o.orders ? o.dict.group_concat(', ', order: Array(o.orders)) : o.dict.group_concat(', ')).coalesce('') \
      + ']'
    collector = visit res, collector
  else
    res = Arel.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 130

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 576

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 137

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 77

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 238

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 123

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 268

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.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 84

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 57

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 167

def visit_ArelExtensions_Nodes_RegexpReplace o, collector
  collector << 'REGEXP_REPLACE('
  visit o.left, collector
  collector << COMMA
  visit Arel.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 178

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 156

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 67

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 248

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 198

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 562

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 146

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 94

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 441

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 228

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 508

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 515

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 218

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 569

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