module Sequel::MSSQL

Constants

CONSTANT_MAP
EXTRACT_MAP
LIMIT_ALL

Public Class Methods

mock_adapter_setup(db) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 9
def self.mock_adapter_setup(db)
  db.instance_exec do
    @server_version = 11000000
  end
end

Public Instance Methods

complex_expression_sql_append(sql, op, args) click to toggle source

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 549
def complex_expression_sql_append(sql, op, args)
  case op
  when :'||'
    super(sql, :+, args)
  when :LIKE, :"NOT LIKE"
    super(sql, op, complex_expression_sql_like_args(args, " COLLATE Latin1_General_CS_AS)"))
  when :ILIKE, :"NOT ILIKE"
    super(sql, (op == :ILIKE ? :LIKE : :"NOT LIKE"), complex_expression_sql_like_args(args, " COLLATE Latin1_General_CI_AS)"))
  when :<<, :>>
    complex_expression_emulate_append(sql, op, args)
  when :extract
    part = args[0]
    raise(Sequel::Error, "unsupported extract argument: #{part.inspect}") unless format = EXTRACT_MAP[part]
    if part == :second
      expr = args[1]
      sql << "CAST((datepart(" << format.to_s << ', '
      literal_append(sql, expr)
      sql << ') + datepart(ns, '
      literal_append(sql, expr)
      sql << ")/1000000000.0) AS double precision)"
    else
      sql << "datepart(" << format.to_s << ', '
      literal_append(sql, args[1])
      sql << ')'
    end
  else
    super
  end
end

constant_sql_append(sql, constant) click to toggle source

MSSQL doesn't support the SQL standard CURRENT_DATE or CURRENT_TIME

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 580
def constant_sql_append(sql, constant)
  if c = CONSTANT_MAP[constant]
    sql << c
  else
    super
  end
end

cross_apply(table) click to toggle source

Uses CROSS APPLY to join the given table into the current dataset.

# File lib/sequel/adapters/shared/mssql.rb, line 589
def cross_apply(table)
  join_table(:cross_apply, table)
end

disable_insert_output() click to toggle source

Disable the use of INSERT OUTPUT

# File lib/sequel/adapters/shared/mssql.rb, line 594
def disable_insert_output
  clone(:disable_insert_output=>true)
end

escape_like(string) click to toggle source

MSSQL treats [] as a metacharacter in LIKE expresions.

# File lib/sequel/adapters/shared/mssql.rb, line 599
def escape_like(string)
  string.gsub(/[\\%_\[\]]/){|m| "\\#{m}"}
end

full_text_search(cols, terms, opts = OPTS) click to toggle source

MSSQL uses the CONTAINS keyword for full text search

# File lib/sequel/adapters/shared/mssql.rb, line 604
def full_text_search(cols, terms, opts = OPTS)
  terms = "\"#{terms.join('" OR "')}\"" if terms.is_a?(Array)
  where(Sequel.lit("CONTAINS (?, ?)", cols, terms))
end

insert_select(*values) click to toggle source

Insert a record, returning the record inserted, using OUTPUT. Always returns nil without running an INSERT statement if #disable_insert_output is used. If the query runs but returns no values, returns false.

# File lib/sequel/adapters/shared/mssql.rb, line 612
def insert_select(*values)
  return unless supports_insert_select?
  with_sql_first(insert_select_sql(*values)) || false
end

insert_select_sql(*values) click to toggle source

Add OUTPUT clause unless there is already an existing output clause, then return the SQL to insert.

# File lib/sequel/adapters/shared/mssql.rb, line 619
def insert_select_sql(*values)
  ds = (opts[:output] || opts[:returning]) ? self : output(nil, [SQL::ColumnAll.new(:inserted)])
  ds.insert_sql(*values)
end

into(table) click to toggle source

Specify a table for a SELECT … INTO query.

# File lib/sequel/adapters/shared/mssql.rb, line 625
def into(table)
  clone(:into => table)
end

mssql_unicode_strings() click to toggle source

Use the database's #mssql_unicode_strings setting if the dataset hasn't overridden it.

# File lib/sequel/adapters/shared/mssql.rb, line 540
def mssql_unicode_strings
  opts.has_key?(:mssql_unicode_strings) ? opts[:mssql_unicode_strings] : db.mssql_unicode_strings
end

nolock() click to toggle source

Allows you to do a dirty read of uncommitted data using WITH (NOLOCK).

# File lib/sequel/adapters/shared/mssql.rb, line 630
def nolock
  lock_style(:dirty)
end

outer_apply(table) click to toggle source

Uses OUTER APPLY to join the given table into the current dataset.

# File lib/sequel/adapters/shared/mssql.rb, line 635
def outer_apply(table)
  join_table(:outer_apply, table)
end

output(into, values) click to toggle source

Include an OUTPUT clause in the eventual INSERT, UPDATE, or DELETE query.

The first argument is the table to output into, and the second argument is either an Array of column values to select, or a Hash which maps output column names to selected values, in the style of insert or update.

Output into a returned result set is not currently supported.

Examples:

dataset.output(:output_table, [Sequel[:deleted][:id], Sequel[:deleted][:name]])
dataset.output(:output_table, id: Sequel[:inserted][:id], name: Sequel[:inserted][:name])

# File lib/sequel/adapters/shared/mssql.rb, line 651
def output(into, values)
  raise(Error, "SQL Server versions 2000 and earlier do not support the OUTPUT clause") unless supports_output_clause?
  output = {}
  case values
  when Hash
    output[:column_list], output[:select_list] = values.keys, values.values
  when Array
    output[:select_list] = values
  end
  output[:into] = into
  clone(:output => output)
end

quoted_identifier_append(sql, name) click to toggle source

MSSQL uses [] to quote identifiers.

# File lib/sequel/adapters/shared/mssql.rb, line 665
def quoted_identifier_append(sql, name)
  sql << '[' << name.to_s.gsub(/\]/, ']]') << ']'
end

returning(*values) click to toggle source

Emulate RETURNING using the output clause. This only handles values that are simple column references.

# File lib/sequel/adapters/shared/mssql.rb, line 670
def returning(*values)
  values = values.map do |v|
    unless r = unqualified_column_for(v)
      raise(Error, "cannot emulate RETURNING via OUTPUT for value: #{v.inspect}")
    end
    r
  end
  clone(:returning=>values)
end

select_sql() click to toggle source

On MSSQL 2012+ add a default order to the current dataset if an offset is used. The default offset emulation using a subquery would be used in the unordered case by default, and that also adds a default order, so it's better to just avoid the subquery.

Calls superclass method Sequel::EmulateOffsetWithRowNumber#select_sql

# File lib/sequel/adapters/shared/mssql.rb, line 684
def select_sql
  if @opts[:offset]
    raise(Error, "Using with_ties is not supported with an offset on Microsoft SQL Server") if @opts[:limit_with_ties]
    return order(1).select_sql if is_2012_or_later? && !@opts[:order]
  end
  super
end

server_version() click to toggle source

The version of the database server.

# File lib/sequel/adapters/shared/mssql.rb, line 693
def server_version
  db.server_version(@opts[:server])
end

supports_cte?(type=:select) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 697
def supports_cte?(type=:select)
  is_2005_or_later?
end

supports_group_cube?() click to toggle source

MSSQL 2005+ supports GROUP BY CUBE.

# File lib/sequel/adapters/shared/mssql.rb, line 702
def supports_group_cube?
  is_2005_or_later?
end

supports_group_rollup?() click to toggle source

MSSQL 2005+ supports GROUP BY ROLLUP

# File lib/sequel/adapters/shared/mssql.rb, line 707
def supports_group_rollup?
  is_2005_or_later?
end

supports_grouping_sets?() click to toggle source

MSSQL 2008+ supports GROUPING SETS

# File lib/sequel/adapters/shared/mssql.rb, line 712
def supports_grouping_sets?
  is_2008_or_later?
end

supports_insert_select?() click to toggle source

MSSQL supports #insert_select via the OUTPUT clause.

# File lib/sequel/adapters/shared/mssql.rb, line 717
def supports_insert_select?
  supports_output_clause? && !opts[:disable_insert_output]
end

supports_intersect_except?() click to toggle source

MSSQL 2005+ supports INTERSECT and EXCEPT

# File lib/sequel/adapters/shared/mssql.rb, line 722
def supports_intersect_except?
  is_2005_or_later?
end

supports_is_true?() click to toggle source

MSSQL does not support IS TRUE

# File lib/sequel/adapters/shared/mssql.rb, line 727
def supports_is_true?
  false
end

supports_join_using?() click to toggle source

MSSQL doesn't support JOIN USING

# File lib/sequel/adapters/shared/mssql.rb, line 732
def supports_join_using?
  false
end

supports_merge?() click to toggle source

MSSQL 2008+ supports MERGE

# File lib/sequel/adapters/shared/mssql.rb, line 737
def supports_merge?
  is_2008_or_later?
end

supports_modifying_joins?() click to toggle source

MSSQL 2005+ supports modifying joined datasets

# File lib/sequel/adapters/shared/mssql.rb, line 742
def supports_modifying_joins?
  is_2005_or_later?
end

supports_multiple_column_in?() click to toggle source

MSSQL does not support multiple columns for the IN/NOT IN operators

# File lib/sequel/adapters/shared/mssql.rb, line 747
def supports_multiple_column_in?
  false
end

supports_nowait?() click to toggle source

MSSQL supports NOWAIT.

# File lib/sequel/adapters/shared/mssql.rb, line 752
def supports_nowait?
  true
end

supports_offsets_in_correlated_subqueries?() click to toggle source

MSSQL 2012+ supports offsets in correlated subqueries.

# File lib/sequel/adapters/shared/mssql.rb, line 757
def supports_offsets_in_correlated_subqueries?
  is_2012_or_later?
end

supports_output_clause?() click to toggle source

MSSQL 2005+ supports the OUTPUT clause.

# File lib/sequel/adapters/shared/mssql.rb, line 762
def supports_output_clause?
  is_2005_or_later?
end

supports_returning?(type) click to toggle source

MSSQL 2005+ can emulate RETURNING via the OUTPUT clause.

# File lib/sequel/adapters/shared/mssql.rb, line 767
def supports_returning?(type)
  supports_insert_select?
end

supports_skip_locked?() click to toggle source

MSSQL uses READPAST to skip locked rows.

# File lib/sequel/adapters/shared/mssql.rb, line 772
def supports_skip_locked?
  true
end

supports_where_true?() click to toggle source

MSSQL cannot use WHERE 1.

# File lib/sequel/adapters/shared/mssql.rb, line 782
def supports_where_true?
  false
end

supports_window_functions?() click to toggle source

MSSQL 2005+ supports window functions

# File lib/sequel/adapters/shared/mssql.rb, line 777
def supports_window_functions?
  true
end

with_mssql_unicode_strings(v) click to toggle source

Return a cloned dataset with the #mssql_unicode_strings option set.

# File lib/sequel/adapters/shared/mssql.rb, line 545
def with_mssql_unicode_strings(v)
  clone(:mssql_unicode_strings=>v)
end

with_ties() click to toggle source

Use WITH TIES when limiting the result set to also include additional rows matching the last row.

# File lib/sequel/adapters/shared/mssql.rb, line 788
def with_ties
  clone(:limit_with_ties=>true)
end

Protected Instance Methods

_import(columns, values, opts=OPTS) click to toggle source

If returned primary keys are requested, use OUTPUT unless already set on the dataset. If OUTPUT is already set, use existing returning values. If OUTPUT is only set to return a single columns, return an array of just that column. Otherwise, return an array of hashes.

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 798
def _import(columns, values, opts=OPTS)
  if opts[:return] == :primary_key && !@opts[:output]
    output(nil, [SQL::QualifiedIdentifier.new(:inserted, first_primary_key)])._import(columns, values, opts)
  elsif @opts[:output]
    statements = multi_insert_sql(columns, values)
    ds = naked
    @db.transaction(opts.merge(:server=>@opts[:server])) do
      statements.map{|st| ds.with_sql(st)}
    end.first.map{|v| v.length == 1 ? v.values.first : v}
  else
    super
  end
end

compound_from_self() click to toggle source

If the dataset using a order without a limit or offset or custom SQL, remove the order. Compounds on Microsoft SQL Server have undefined order unless the result is specifically ordered. Applying the current order before the compound doesn't work in all cases, such as when qualified identifiers are used. If you want to ensure a order for a compound dataset, apply the order after all compounds have been added.

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 819
def compound_from_self
  if @opts[:offset] && !@opts[:limit] && !is_2012_or_later?
    clone(:limit=>LIMIT_ALL).from_self
  elsif @opts[:order]  && !(@opts[:sql] || @opts[:limit] || @opts[:offset])
    unordered
  else
    super
  end
end

Private Instance Methods

_merge_when_conditions_sql(sql, data) click to toggle source

Normalize conditions for MERGE WHEN.

# File lib/sequel/adapters/shared/mssql.rb, line 832
def _merge_when_conditions_sql(sql, data)
  if data.has_key?(:conditions)
    sql << " AND "
    literal_append(sql, _normalize_merge_when_conditions(data[:conditions]))
  end
end

_merge_when_sql(sql) click to toggle source

MSSQL requires a semicolon at the end of MERGE.

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 855
def _merge_when_sql(sql)
  super
  sql << ';'
end

_normalize_merge_when_conditions(conditions) click to toggle source

Handle nil, false, and true MERGE WHEN conditions to avoid non-boolean type error.

# File lib/sequel/adapters/shared/mssql.rb, line 841
def _normalize_merge_when_conditions(conditions)
  case conditions
  when nil, false
    {1=>0}
  when true
    {1=>1}
  when Sequel::SQL::DelayedEvaluation
    Sequel.delay{_normalize_merge_when_conditions(conditions.call(self))}
  else
    conditions
  end
end

aggregate_dataset() click to toggle source

MSSQL does not allow ordering in sub-clauses unless TOP (limit) is specified

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 861
def aggregate_dataset
  (options_overlap(Sequel::Dataset::COUNT_FROM_SELF_OPTS) && !options_overlap([:limit])) ? unordered.from_self : super
end

check_not_limited!(type) click to toggle source

Allow update and delete for unordered, limited datasets only.

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 866
def check_not_limited!(type)
  return if @opts[:skip_limit_check] && type != :truncate
  raise Sequel::InvalidOperation, "Dataset##{type} not suppored on ordered, limited datasets" if opts[:order] && opts[:limit]
  super if type == :truncate || @opts[:offset]
end

complex_expression_sql_like_args(args, collation) click to toggle source

Determine whether to add the COLLATE for LIKE arguments, based on the Database setting.

# File lib/sequel/adapters/shared/mssql.rb, line 888
def complex_expression_sql_like_args(args, collation)
  if db.like_without_collate
    args
  else
    args.map{|a| Sequel.lit(["(", collation], a)}
  end
end

default_timestamp_format() click to toggle source

Use strict ISO-8601 format with T between date and time, since that is the format that is multilanguage and not DATEFORMAT dependent.

# File lib/sequel/adapters/shared/mssql.rb, line 899
def default_timestamp_format
  "'%Y-%m-%dT%H:%M:%S%N%z'"
end

delete_from2_sql(sql) click to toggle source

MSSQL supports FROM clauses in DELETE and UPDATE statements.

# File lib/sequel/adapters/shared/mssql.rb, line 910
def delete_from2_sql(sql)
  if joined_dataset?
    select_from_sql(sql)
    select_join_sql(sql)
  end
end

Also aliased as: update_from_sql

delete_from_sql(sql) click to toggle source

Only include the primary table in the main delete clause

# File lib/sequel/adapters/shared/mssql.rb, line 904
def delete_from_sql(sql)
  sql << ' FROM '
  source_list_append(sql, @opts[:from][0..0])
end

delete_limit_sql(sql)

Alias for: update_limit_sql

delete_output_sql(sql) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 918
def delete_output_sql(sql)
  output_sql(sql, :DELETED)
end

emulate_function?(name) click to toggle source

There is no function on Microsoft SQL Server that does character length and respects trailing spaces (datalength respects trailing spaces, but counts bytes instead of characters). Use a hack to work around the trailing spaces issue.

# File lib/sequel/adapters/shared/mssql.rb, line 926
def emulate_function?(name)
  name == :char_length || name == :trim
end

emulate_function_sql_append(sql, f) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 930
def emulate_function_sql_append(sql, f)
  case f.name
  when :char_length
    literal_append(sql, SQL::Function.new(:len, Sequel.join([f.args.first, 'x'])) - 1)
  when :trim
    literal_append(sql, SQL::Function.new(:ltrim, SQL::Function.new(:rtrim, f.args.first)))
  end
end

emulate_offset_with_row_number?() click to toggle source

Microsoft SQL Server 2012+ has native support for offsets, but only for ordered datasets.

Calls superclass method Sequel::EmulateOffsetWithRowNumber#emulate_offset_with_row_number?

# File lib/sequel/adapters/shared/mssql.rb, line 940
def emulate_offset_with_row_number?
  super && !(is_2012_or_later? && @opts[:order])
end

first_primary_key() click to toggle source

Return the first primary key for the current table. If this table has multiple primary keys, this will only return one of them. Used by #_import.

# File lib/sequel/adapters/shared/mssql.rb, line 946
def first_primary_key
  @db.schema(self).map{|k, v| k if v[:primary_key] == true}.compact.first
end

insert_output_sql(sql) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 950
def insert_output_sql(sql)
  output_sql(sql, :INSERTED)
end

Also aliased as: update_output_sql

is_2005_or_later?() click to toggle source

Whether we are using SQL Server 2005 or later.

# File lib/sequel/adapters/shared/mssql.rb, line 873
def is_2005_or_later?
  server_version >= 9000000
end

is_2008_or_later?() click to toggle source

Whether we are using SQL Server 2008 or later.

# File lib/sequel/adapters/shared/mssql.rb, line 878
def is_2008_or_later?
  server_version >= 10000000
end

is_2012_or_later?() click to toggle source

Whether we are using SQL Server 2012 or later.

# File lib/sequel/adapters/shared/mssql.rb, line 883
def is_2012_or_later?
  server_version >= 11000000
end

join_type_sql(join_type) click to toggle source

Handle CROSS APPLY and OUTER APPLY JOIN types

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 956
def join_type_sql(join_type)
  case join_type
  when :cross_apply
    'CROSS APPLY'
  when :outer_apply
    'OUTER APPLY'
  else
    super
  end
end

literal_blob_append(sql, v) click to toggle source

MSSQL uses a literal hexidecimal number for blob strings

# File lib/sequel/adapters/shared/mssql.rb, line 968
def literal_blob_append(sql, v)
  sql << '0x' << v.unpack("H*").first
end

literal_date(v) click to toggle source

Use YYYYmmdd format, since that's the only format that is multilanguage and not DATEFORMAT dependent.

# File lib/sequel/adapters/shared/mssql.rb, line 974
def literal_date(v)
  v.strftime("'%Y%m%d'")
end

literal_false() click to toggle source

Use 0 for false on MSSQL

# File lib/sequel/adapters/shared/mssql.rb, line 979
def literal_false
  '0'
end

literal_string_append(sql, v) click to toggle source

Optionally use unicode string syntax for all strings. Don't double backslashes.

# File lib/sequel/adapters/shared/mssql.rb, line 985
def literal_string_append(sql, v)
  sql << (mssql_unicode_strings ? "N'" : "'")
  sql << v.gsub("'", "''").gsub(/\\((?:\r\n)|\n)/, '\\\\\\\\\\1\\1') << "'"
end

literal_true() click to toggle source

Use 1 for true on MSSQL

# File lib/sequel/adapters/shared/mssql.rb, line 991
def literal_true
  '1'
end

multi_insert_sql_strategy() click to toggle source

MSSQL 2008+ supports multiple rows in the VALUES clause, older versions can use UNION.

# File lib/sequel/adapters/shared/mssql.rb, line 997
def multi_insert_sql_strategy
  is_2008_or_later? ? :values : :union
end

non_sql_option?(key) click to toggle source

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 1001
def non_sql_option?(key)
  super || key == :disable_insert_output || key == :mssql_unicode_strings
end

output_list_sql(sql, output) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 1102
def output_list_sql(sql, output)
  sql << " OUTPUT "
  column_list_append(sql, output[:select_list])
  if into = output[:into]
    sql << " INTO "
    identifier_append(sql, into)
    if column_list = output[:column_list]
      sql << ' ('
      source_list_append(sql, column_list)
      sql << ')'
    end
  end
end

output_returning_sql(sql, type, values) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 1116
def output_returning_sql(sql, type, values)
  sql << " OUTPUT "
  if values.empty?
    literal_append(sql, SQL::ColumnAll.new(type))
  else
    values = values.map do |v|
      case v
      when SQL::AliasedExpression
        Sequel.qualify(type, v.expression).as(v.alias)
      else
        Sequel.qualify(type, v)
      end
    end
    column_list_append(sql, values)
  end
end

output_sql(sql, type) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 1093
def output_sql(sql, type)
  return unless supports_output_clause?
  if output = @opts[:output]
    output_list_sql(sql, output)
  elsif values = @opts[:returning]
    output_returning_sql(sql, type, values)
  end
end

requires_emulating_nulls_first?() click to toggle source

MSSQL does not natively support NULLS FIRST/LAST.

# File lib/sequel/adapters/shared/mssql.rb, line 1134
def requires_emulating_nulls_first?
  true
end

select_into_sql(sql) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 1005
def select_into_sql(sql)
  if i = @opts[:into]
    sql << " INTO "
    identifier_append(sql, i)
  end
end

select_limit_sql(sql) click to toggle source

MSSQL 2000 uses TOP N for limit. For MSSQL 2005+ TOP (N) is used to allow the limit to be a bound variable.

# File lib/sequel/adapters/shared/mssql.rb, line 1014
def select_limit_sql(sql)
  if l = @opts[:limit]
    return if is_2012_or_later? && @opts[:order] && @opts[:offset]
    shared_limit_sql(sql, l)
  end
end

select_lock_sql(sql) click to toggle source

Handle dirty, skip locked, and for update locking

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 1048
def select_lock_sql(sql)
  lock = @opts[:lock]
  skip_locked = @opts[:skip_locked]
  nowait = @opts[:nowait]
  for_update = lock == :update
  dirty = lock == :dirty
  lock_hint = for_update || dirty

  if lock_hint || skip_locked
    sql << " WITH ("

    if lock_hint
      sql << (for_update ? 'UPDLOCK' : 'NOLOCK')
    end

    if skip_locked || nowait
      sql << ', ' if lock_hint
      sql << (skip_locked ? "READPAST" : "NOWAIT")
    end

    sql << ')'
  else
    super
  end
end

select_order_sql(sql) click to toggle source

On 2012+ when there is an order with an offset, append the offset (and possible limit) at the end of the order clause.

Calls superclass method

# File lib/sequel/adapters/shared/mssql.rb, line 1076
def select_order_sql(sql)
  super
  if is_2012_or_later? && @opts[:order]
    if o = @opts[:offset]
      sql << " OFFSET "
      literal_append(sql, o)
      sql << " ROWS"

      if l = @opts[:limit]
        sql << " FETCH NEXT "
        literal_append(sql, l)
        sql << " ROWS ONLY"
      end
    end
  end
end

shared_limit_sql(sql, l) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 1021
def shared_limit_sql(sql, l)
  if is_2005_or_later?
    if l == LIMIT_ALL
      sql << " TOP (100) PERCENT"
    else
      sql << " TOP ("
      literal_append(sql, l)
      sql << ')'
    end
  else
    sql << " TOP "
    literal_append(sql, l)
  end

  if @opts[:limit_with_ties]
    sql << " WITH TIES"
  end
end

sqltime_precision() click to toggle source

MSSQL supports 100-nsec precision for time columns, but ruby by default only supports usec precision.

# File lib/sequel/adapters/shared/mssql.rb, line 1140
def sqltime_precision
  6
end

timestamp_precision() click to toggle source

MSSQL supports millisecond timestamp precision for datetime columns. 100-nsec precision is supported for datetime2 columns, but Sequel does not know what the column type is when formatting values.

# File lib/sequel/adapters/shared/mssql.rb, line 1147
def timestamp_precision
  3
end

update_from_sql(sql)

Alias for: delete_from2_sql

update_limit_sql(sql) click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 1040
def update_limit_sql(sql)
  if l = @opts[:limit]
    shared_limit_sql(sql, l)
  end
end

Also aliased as: delete_limit_sql

update_output_sql(sql)

Alias for: insert_output_sql

update_table_sql(sql) click to toggle source

Only include the primary table in the main update clause

# File lib/sequel/adapters/shared/mssql.rb, line 1152
def update_table_sql(sql)
  sql << ' '
  source_list_append(sql, @opts[:from][0..0])
end

uses_with_rollup?() click to toggle source

# File lib/sequel/adapters/shared/mssql.rb, line 1157
def uses_with_rollup?
  !is_2008_or_later?
end