Module: ArelExtensions::Visitors::MSSQL

Included in:
Arel::Visitors::MSSQL, Arel::Visitors::SQLServer
Defined in:
lib/arel_extensions/visitors/mssql.rb

Constant Summary collapse

LOADED_VISITOR = 
Arel::Visitors.const_get(mssql_class) || Arel::Visitors.const_get('MSSQL')

Instance Method Summary collapse

Instance Method Details

#visit_Arel_Nodes_As(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 429

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

  # sometimes these values are already quoted, if they are, don't double quote it
  quote = o.right.is_a?(Arel::Nodes::SqlLiteral) && o.right[0] != '"' && o.right[-1] != '"'

  collector << '"' if quote
  collector = visit o.right, collector
  collector << '"' if quote

  collector
end

#visit_Arel_Nodes_NotRegexp(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 456

def visit_Arel_Nodes_NotRegexp o, collector
  collector = visit o.left, collector
  collector << "NOT LIKE '%#{o.right}%'"
  collector
end

#visit_Arel_Nodes_Regexp(o, collector) ⇒ Object

SQL Server does not know about REGEXP



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# File 'lib/arel_extensions/visitors/mssql.rb', line 450

def visit_Arel_Nodes_Regexp o, collector
  collector = visit o.left, collector
  collector << "LIKE '%#{o.right}%'"
  collector
end

#visit_ArelExtensions_Nodes_AiIMatches(o, collector) ⇒ Object 



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

def visit_ArelExtensions_Nodes_AiIMatches o, collector
  collector = visit o.left.collate(true,true), collector
  collector << ' LIKE '
  collector = visit o.right.collate(true,true), collector
  if o.escape
    collector << ' ESCAPE '
    visit o.escape, collector
  else
    collector
  end
end

#visit_ArelExtensions_Nodes_AiMatches(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 375

def visit_ArelExtensions_Nodes_AiMatches o, collector
  collector = visit o.left.ai_collate, collector
  collector << ' LIKE '
  collector = visit o.right.ai_collate, collector
  if o.escape
    collector << ' ESCAPE '
    visit o.escape, collector
  else
    collector
  end
end

#visit_ArelExtensions_Nodes_Blank(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 260

def visit_ArelExtensions_Nodes_Blank o, collector
  visit o.expr.coalesce('').trim.length.eq(0), collector
end

#visit_ArelExtensions_Nodes_Cast(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 493

def visit_ArelExtensions_Nodes_Cast o, collector
  case o.as_attr
  when :string
    as_attr = Arel::Nodes::SqlLiteral.new('varchar')
  when :time
    as_attr = Arel::Nodes::SqlLiteral.new('time')
  when :date
    as_attr = Arel::Nodes::SqlLiteral.new('date')
  when :datetime
    as_attr = Arel::Nodes::SqlLiteral.new('datetime')
  when :number,:decimal, :float
    as_attr = Arel::Nodes::SqlLiteral.new('decimal(10,6)')
  when :int
    collector << "CAST(CAST("
    collector = visit o.left, collector
    collector << " AS decimal(10,0)) AS int)"
    return collector
  when :binary
    as_attr = Arel::Nodes::SqlLiteral.new('binary')
  else
    as_attr = Arel::Nodes::SqlLiteral.new(o.as_attr.to_s)
  end
  collector << "CAST("
  collector = visit o.left, collector
  collector << " AS "
  collector = visit as_attr, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Ceil(o, collector) ⇒ Object

Math Functions



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# File 'lib/arel_extensions/visitors/mssql.rb', line 48

def visit_ArelExtensions_Nodes_Ceil o, collector
  collector << "CEILING("
  collector = visit o.expr, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Collate(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 411

def visit_ArelExtensions_Nodes_Collate o, collector
  if o.ai && o.ci
    collector = visit o.expressions.first, collector
    collector << ' COLLATE Latin1_General_CI_AI'
  elsif o.ai
    collector = visit o.expressions.first, collector
    collector << ' COLLATE Latin1_General_CS_AI'
  elsif o.ci
    collector = visit o.expressions.first, collector
    collector << ' COLLATE Latin1_General_CI_AS'
  else
    collector = visit o.expressions.first, collector
    collector << ' COLLATE Latin1_General_CS_AS'
  end
  collector
end

#visit_ArelExtensions_Nodes_Concat(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 89

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

#visit_ArelExtensions_Nodes_DateAdd(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 139

def visit_ArelExtensions_Nodes_DateAdd o, collector
  collector << "DATEADD("
  collector = visit o.mssql_datepart(o.right), collector
  collector << LOADED_VISITOR::COMMA
  collector = visit o.mssql_value(o.right), collector
  collector << LOADED_VISITOR::COMMA
  collector = visit o.left, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_DateDiff(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 111

def visit_ArelExtensions_Nodes_DateDiff o, collector
  case o.right_node_type
  when :ruby_date, :ruby_time, :date, :datetime, :time
    collector << case o.left_node_type
                when :ruby_time, :datetime, :time then 'DATEDIFF(second'
                else                                   'DATEDIFF(day'
                end
    collector << LOADED_VISITOR::COMMA
    collector = visit o.right, collector
    collector << LOADED_VISITOR::COMMA
    collector = visit o.left, collector
    collector << ')'
  else
    da = ArelExtensions::Nodes::DateAdd.new([])
    collector << "DATEADD("
    collector = visit da.mssql_datepart(o.right), collector
    collector << LOADED_VISITOR::COMMA
    collector << "-("
    collector = visit da.mssql_value(o.right), collector
    collector << ")"
    collector << LOADED_VISITOR::COMMA
    collector = visit o.left, collector
    collector << ")"
    collector
  end
  collector
end

#visit_ArelExtensions_Nodes_Duration(o, collector) ⇒ Object 



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

def visit_ArelExtensions_Nodes_Duration o, collector
  if o.with_interval && o.left.end_with?('i')
    collector = visit o.right, collector
  else
    left = o.left.end_with?('i') ? o.left[0..-2] : o.left
    conv = ['h', 'mn', 's'].include?(o.left)
    collector << 'DATEPART('
    collector << LOADED_VISITOR::DATE_MAPPING[left]
    collector << LOADED_VISITOR::COMMA
    collector << 'CONVERT(datetime,' if conv
    collector = visit o.right, collector
    collector << ')' if conv
    collector << ")"
  end
  collector
end

#visit_ArelExtensions_Nodes_FindInSet(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 339

def visit_ArelExtensions_Nodes_FindInSet o, collector
  collector << "dbo.FIND_IN_SET("
  o.expressions.each_with_index { |arg, i|
    collector << LOADED_VISITOR::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/mssql.rb', line 268

def visit_ArelExtensions_Nodes_Format o, collector
  f = ArelExtensions::Visitors::strftime_to_format(o.iso_format, LOADED_VISITOR::DATE_FORMAT_DIRECTIVES)
  if fmt = LOADED_VISITOR::DATE_CONVERT_FORMATS[f]
    collector << "CONVERT(VARCHAR(#{f.length})"
    collector << LOADED_VISITOR::COMMA
    if o.time_zone
      collector << 'CONVERT(datetime'
      collector << LOADED_VISITOR::COMMA
      collector << ' '
    end
    collector = visit o.left, collector
    if o.time_zone
      collector << ") AT TIME ZONE 'UTC' AT TIME ZONE "
      collector = visit o.time_zone, collector
    end
    collector << LOADED_VISITOR::COMMA
    collector << fmt.to_s
    collector << ')'
    collector
  else
    s = StringScanner.new o.iso_format
    collector << "("
    sep = ''
    while !s.eos?
      collector << sep
      sep = ' + '
      case
      when s.scan(LOADED_VISITOR::DATE_FORMAT_REGEX)
        dir = LOADED_VISITOR::DATE_FORMAT_DIRECTIVES[s.matched]
        fmt = LOADED_VISITOR::DATE_FORMAT_FORMAT[dir]
        collector << 'TRIM('
        collector << 'FORMAT(' if fmt
        collector << 'STR('    if !fmt
        collector << 'DATEPART('
        collector << dir
        collector << LOADED_VISITOR::COMMA
        if o.time_zone
          collector << 'CONVERT(datetime'
          collector << LOADED_VISITOR::COMMA
          collector << ' '
        end
        collector = visit o.left, collector
        if o.time_zone
          collector << ") AT TIME ZONE 'UTC' AT TIME ZONE "
          collector = visit o.time_zone, collector
        end
        collector << ')'
        collector << ')'                                  if !fmt
        collector << LOADED_VISITOR::COMMA << "'#{fmt}')" if fmt
        collector << ')'
      when s.scan(/^%%/)
        collector = visit Arel::Nodes.build_quoted('%'), collector
      when s.scan(/[^%]+|./)
        collector = visit Arel::Nodes.build_quoted(s.matched), collector
      end
    end
    collector << ')'
    collector
  end
end

#visit_ArelExtensions_Nodes_FormattedNumber(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 523

def visit_ArelExtensions_Nodes_FormattedNumber o, collector
  col = o.left.coalesce(0)
  locale = Arel::Nodes.build_quoted(o.locale.tr('_','-'))
  param = Arel::Nodes.build_quoted("N#{o.precision}")
  sign = ArelExtensions::Nodes::Case.new.when(col<0).
            then('-').
            else(o.flags.include?('+') ? '+' : (o.flags.include?(' ') ? ' ' : ''))
  sign_length = o.flags.include?('+') || o.flags.include?(' ') ?
        Arel::Nodes.build_quoted(1) :
        ArelExtensions::Nodes::Case.new.when(col<0).then(1).else(0)

  number =
    if o.scientific_notation
      ArelExtensions::Nodes::Concat.new([
            Arel::Nodes::NamedFunction.new('FORMAT',[
              col.abs/Arel::Nodes.build_quoted(10).pow(col.abs.log10.floor),
              param,
              locale
            ]),
            o.type,
            Arel::Nodes::NamedFunction.new('FORMAT',[
              col.abs.log10.floor,
              Arel::Nodes.build_quoted('N0'),
              locale
            ])
          ])
    else
      Arel::Nodes::NamedFunction.new('FORMAT',[
          Arel::Nodes.build_quoted(col.abs),
          param,
          locale
        ])
    end

  repeated_char = (o.width == 0) ? Arel::Nodes.build_quoted('') : ArelExtensions::Nodes::Case.new().
    when(Arel::Nodes.build_quoted(o.width).abs-(number.length+sign_length)>0).
    then(Arel::Nodes.build_quoted(
        o.flags.include?('-') ? ' ' : (o.flags.include?('0') ? '0' : ' ')
      ).repeat(Arel::Nodes.build_quoted(o.width).abs-(number.length+sign_length))
    ).
    else('')
  before = (!o.flags.include?('0'))&&(!o.flags.include?('-')) ? repeated_char : ''
  middle = (o.flags.include?('0'))&&(!o.flags.include?('-'))  ? repeated_char : ''
  after  = o.flags.include?('-') ? repeated_char : ''
  full_number =
    ArelExtensions::Nodes::Concat.new([
      before,
      sign,
      middle,
      number,
      after
    ])
  collector = visit ArelExtensions::Nodes::Concat.new([Arel::Nodes.build_quoted(o.prefix),full_number,Arel::Nodes.build_quoted(o.suffix)]), collector
  collector
end

#visit_ArelExtensions_Nodes_GroupConcat(o, collector) ⇒ Object

TODO;



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# File 'lib/arel_extensions/visitors/mssql.rb', line 463

def visit_ArelExtensions_Nodes_GroupConcat o, collector
  collector << "(STRING_AGG("
  collector = visit o.left, collector
  collector << Arel::Visitors::Oracle::COMMA
  collector =
    if o.separator && o.separator != 'NULL'
      visit o.separator, collector
    else
      visit Arel::Nodes.build_quoted(','), collector
    end
  collector << ") WITHIN GROUP (ORDER BY "
  if o.order.present?
    o.order.each_with_index do |order,i|
      collector << Arel::Visitors::Oracle::COMMA if i != 0
      collector = visit order, collector
    end
  else
    collector = visit o.left, collector
  end
  collector << "))"
  collector
end

#visit_ArelExtensions_Nodes_IDoesNotMatch(o, collector) ⇒ Object

TODO; manage case insensitivity



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# File 'lib/arel_extensions/visitors/mssql.rb', line 363

def visit_ArelExtensions_Nodes_IDoesNotMatch o, collector
  collector = visit o.left.ci_collate, collector
  collector << ' NOT LIKE '
  collector = visit o.right.ci_collate, collector
  if o.escape
    collector << ' ESCAPE '
    visit o.escape, collector
  else
    collector
  end
end

#visit_ArelExtensions_Nodes_IMatches(o, collector) ⇒ Object

TODO; manage case insensitivity



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# File 'lib/arel_extensions/visitors/mssql.rb', line 350

def visit_ArelExtensions_Nodes_IMatches o, collector
  collector = visit o.left.ci_collate, collector
  collector << ' LIKE '
  collector = visit o.right.ci_collate, collector
  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/mssql.rb', line 82

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

#visit_ArelExtensions_Nodes_IsNull(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 75

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

#visit_ArelExtensions_Nodes_JsonGet(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 604

def visit_ArelExtensions_Nodes_JsonGet o,collector
  collector << 'JSON_VALUE('
  collector = visit o.dict, collector
  collector << Arel::Visitors::MySQL::COMMA
  if o.key.is_a?(Integer)
    collector << "\"$[#{o.key}]\""
  else
    collector = visit Arel::Nodes.build_quoted('$.')+o.key, collector
  end
  collector << ')'
  collector
end

#visit_ArelExtensions_Nodes_Length(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 167

def visit_ArelExtensions_Nodes_Length o, collector
  if o.bytewise
    collector << "(DATALENGTH("
    collector = visit o.expr, collector
    collector << ") / ISNULL(NULLIF(DATALENGTH(LEFT(COALESCE("
    collector = visit o.expr, collector
    collector << ", '#' ), 1 )), 0), 1))"
    collector
  else
    collector << "LEN("
    collector = visit o.expr, collector
    collector << ")"
    collector
  end
end

#visit_ArelExtensions_Nodes_LevenshteinDistance(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 594

def visit_ArelExtensions_Nodes_LevenshteinDistance o, collector
  collector << "dbo.LEVENSHTEIN_DISTANCE("
  collector = visit o.left, collector
  collector << Arel::Visitors::ToSql::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/mssql.rb', line 197

def visit_ArelExtensions_Nodes_Locate o, collector
  collector << "CHARINDEX("
  collector = visit o.right, collector
  collector << LOADED_VISITOR::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/mssql.rb', line 55

def visit_ArelExtensions_Nodes_Log10 o, collector
    collector << "LOG10("
    o.expressions.each_with_index { |arg, i|
      collector << Arel::Visitors::ToSql::COMMA if i != 0
      collector = visit arg, collector
    }
    collector << ")"
    collector
end

#visit_ArelExtensions_Nodes_Ltrim(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 226

def visit_ArelExtensions_Nodes_Ltrim o, collector
  if o.right
    collector << "REPLACE(REPLACE(LTRIM(REPLACE(REPLACE("
    collector = visit o.left, collector
    collector << ", ' ', '~'), "
    collector = visit o.right, collector
    collector << ", ' ')), ' ', "
    collector = visit o.right, collector
    collector << "), '~', ' ')"
  else
    collector << "LTRIM("
    collector = visit o.left, collector
    collector << ")"
  end
  collector
end

#visit_ArelExtensions_Nodes_MD5(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 486

def visit_ArelExtensions_Nodes_MD5 o, collector
  collector << "LOWER(CONVERT(NVARCHAR(32),HashBytes('MD5',CONVERT(VARCHAR,"
  collector = visit o.left, collector
  collector << ")),2))"
  collector
end

#visit_ArelExtensions_Nodes_NotBlank(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 264

def visit_ArelExtensions_Nodes_NotBlank o, collector
  visit o.expr.coalesce('').trim.length.gt(0), collector
end

#visit_ArelExtensions_Nodes_Power(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 65

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

#visit_ArelExtensions_Nodes_Repeat(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 99

def visit_ArelExtensions_Nodes_Repeat o, collector
  collector << "REPLICATE("
  o.expressions.each_with_index { |arg, i|
    collector << Arel::Visitors::ToSql::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/mssql.rb', line 329

def visit_ArelExtensions_Nodes_Replace o, collector
  collector << "REPLACE("
  o.expressions.each_with_index { |arg, i|
    collector << LOADED_VISITOR::COMMA if i != 0
    collector = visit arg, collector
  }
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Round(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 183

def visit_ArelExtensions_Nodes_Round o, collector
  collector << "ROUND("
  o.expressions.each_with_index { |arg, i|
    collector << LOADED_VISITOR::COMMA if i != 0
    collector = visit arg, collector
  }
  if o.expressions.length == 1
    collector << LOADED_VISITOR::COMMA
    collector << "0"
  end
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Rtrim(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 243

def visit_ArelExtensions_Nodes_Rtrim o, collector
  if o.right
    collector << "REPLACE(REPLACE(RTRIM(REPLACE(REPLACE("
    collector = visit o.left, collector
    collector << ", ' ', '~'), "
    collector = visit o.right, collector
    collector << ", ' ')), ' ', "
    collector = visit o.right, collector
    collector << "), '~', ' ')"
  else
    collector << "RTRIM("
    collector = visit o.left, collector
    collector << ")"
  end
  collector
end

#visit_ArelExtensions_Nodes_SMatches(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 399

def visit_ArelExtensions_Nodes_SMatches o, collector
  collector = visit o.left.collate, collector
  collector << ' LIKE '
  collector = visit o.right.collate, collector
  if o.escape
    collector << ' ESCAPE '
    visit o.escape, collector
  else
    collector
  end
end

#visit_ArelExtensions_Nodes_Std(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 579

def visit_ArelExtensions_Nodes_Std o, collector
  collector << (o.unbiased_estimator ? "STDEV(" : "STDEVP(")
  visit o.left, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Substring(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 206

def visit_ArelExtensions_Nodes_Substring o, collector
  collector << 'SUBSTRING('
  collector = visit o.expressions[0], collector
  collector << LOADED_VISITOR::COMMA
  collector = visit o.expressions[1], collector
  collector << LOADED_VISITOR::COMMA
  collector = o.expressions[2] ? visit(o.expressions[2], collector) : visit(o.expressions[0].length, collector)
  collector << ')'
  collector
end

#visit_ArelExtensions_Nodes_Trim(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 217

def visit_ArelExtensions_Nodes_Trim o, collector
  collector << 'TRIM( '
  collector = visit o.right, collector
  collector << " FROM "
  collector = visit o.left, collector
  collector << ")"
  collector
end

#visit_ArelExtensions_Nodes_Variance(o, collector) ⇒ Object 



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# File 'lib/arel_extensions/visitors/mssql.rb', line 586

def visit_ArelExtensions_Nodes_Variance o, collector
  collector << (o.unbiased_estimator ? "VAR(" : "VARP(")
  visit o.left, collector
  collector << ")"
  collector
end