Module: ActiveRecord::ConnectionAdapters::SQLServer::DatabaseStatements

Includes:
Savepoints
Included in:
ActiveRecord::ConnectionAdapters::SQLServerAdapter
Defined in:
lib/active_record/connection_adapters/sqlserver/database_statements.rb

Instance Method Summary collapse

Instance Method Details

#begin_db_transaction ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 62

def begin_db_transaction
  do_execute "BEGIN TRANSACTION", "TRANSACTION"
end

#begin_isolated_db_transaction(isolation) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 70

def begin_isolated_db_transaction(isolation)
  set_transaction_isolation_level transaction_isolation_levels.fetch(isolation)
  begin_db_transaction
end

#build_insert_sql(insert) ⇒ Object

:nodoc:



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 148

def build_insert_sql(insert) # :nodoc:
  sql = +"INSERT #{insert.into}"

  if returning = insert.send(:insert_all).returning
    returning_sql = if returning.is_a?(String)
      returning
    else
      returning.map { |column| "INSERTED.#{quote_column_name(column)}" }.join(", ")
    end
    sql << " OUTPUT #{returning_sql}"
  end

  sql << " #{insert.values_list}"
  sql
end

#case_sensitive_comparison(attribute, value) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 100

def case_sensitive_comparison(attribute, value)
  column = column_for_attribute(attribute)

  if column.collation && !column.case_sensitive?
    attribute.eq(Arel::Nodes::Bin.new(value))
  else
    super
  end
end

#commit_db_transaction ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 79

def commit_db_transaction
  do_execute "COMMIT TRANSACTION", "TRANSACTION"
end

#create_savepoint(name = current_savepoint_name) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 89

def create_savepoint(name = current_savepoint_name)
  do_execute "SAVE TRANSACTION #{name}", "TRANSACTION"
end

#exec_delete(sql, name, binds) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 52

def exec_delete(sql, name, binds)
  sql = sql.dup << "; SELECT @@ROWCOUNT AS AffectedRows"
  super(sql, name, binds).rows.first.first
end

#exec_insert(sql, name = nil, binds = [], pk = nil, _sequence_name = nil) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 44

def exec_insert(sql, name = nil, binds = [], pk = nil, _sequence_name = nil)
  if id_insert_table_name = exec_insert_requires_identity?(sql, pk, binds)
    with_identity_insert_enabled(id_insert_table_name) { super(sql, name, binds, pk) }
  else
    super(sql, name, binds, pk)
  end
end

#exec_query(sql, name = "SQL", binds = [], prepare: false, async: false) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 32

def exec_query(sql, name = "SQL", binds = [], prepare: false, async: false)
  sql = transform_query(sql)
  if preventing_writes? && write_query?(sql)
    raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}"
  end

  materialize_transactions
  mark_transaction_written_if_write(sql)

  sp_executesql(sql, name, binds, prepare: prepare, async: async)
end

#exec_rollback_db_transaction ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 83

def exec_rollback_db_transaction
  do_execute "IF @@TRANCOUNT > 0 ROLLBACK TRANSACTION", "TRANSACTION"
end

#exec_rollback_to_savepoint(name = current_savepoint_name) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 93

def exec_rollback_to_savepoint(name = current_savepoint_name)
  do_execute "ROLLBACK TRANSACTION #{name}", "TRANSACTION"
end

#exec_update(sql, name, binds) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 57

def exec_update(sql, name, binds)
  sql = sql.dup << "; SELECT @@ROWCOUNT AS AffectedRows"
  super(sql, name, binds).rows.first.first
end

#execute(sql, name = nil) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 16

def execute(sql, name = nil)
  sql = transform_query(sql)
  if preventing_writes? && write_query?(sql)
    raise ActiveRecord::ReadOnlyError, "Write query attempted while in readonly mode: #{sql}"
  end

  materialize_transactions
  mark_transaction_written_if_write(sql)

  if id_insert_table_name = query_requires_identity_insert?(sql)
    with_identity_insert_enabled(id_insert_table_name) { do_execute(sql, name) }
  else
    do_execute(sql, name)
  end
end

#execute_procedure(proc_name, *variables) ⇒ Object

SQLServer Specific ======================================== #



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 166

def execute_procedure(proc_name, *variables)
  materialize_transactions

  vars = if variables.any? && variables.first.is_a?(Hash)
           variables.first.map { |k, v| "@#{k} = #{quote(v)}" }
         else
           variables.map { |v| quote(v) }
         end.join(", ")
  sql = "EXEC #{proc_name} #{vars}".strip
  name = "Execute Procedure"
  log(sql, name) do
    case @connection_options[:mode]
    when :dblib
      result = ensure_established_connection! { dblib_execute(sql) }
      options = { as: :hash, cache_rows: true, timezone: ActiveRecord.default_timezone || :utc }
      result.each(options) do |row|
        r = row.with_indifferent_access
        yield(r) if block_given?
      end
      result.each.map { |row| row.is_a?(Hash) ? row.with_indifferent_access : row }
    end
  end
end

#insert_fixtures_set(fixture_set, tables_to_delete = []) ⇒ Object

We should propose this change to Rails team



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 111

def insert_fixtures_set(fixture_set, tables_to_delete = [])
  fixture_inserts = []

  fixture_set.each do |table_name, fixtures|
    fixtures.each_slice(insert_rows_length) do |batch|
      fixture_inserts << build_fixture_sql(batch, table_name)
    end
  end

  table_deletes = tables_to_delete.map { |table| "DELETE FROM #{quote_table_name table}" }
  total_sqls = Array.wrap(table_deletes + fixture_inserts)

  disable_referential_integrity do
    transaction(requires_new: true) do
      total_sqls.each do |sql|
        execute sql, "Fixtures Load"
        yield if block_given?
      end
    end
  end
end

#newid_function ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 256

def newid_function
  select_value "SELECT NEWID()"
end

#newsequentialid_function ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 260

def newsequentialid_function
  select_value "SELECT NEWSEQUENTIALID()"
end

#release_savepoint(name = current_savepoint_name) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 97

def release_savepoint(name = current_savepoint_name)
end

#set_transaction_isolation_level(isolation_level) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 75

def set_transaction_isolation_level(isolation_level)
  do_execute "SET TRANSACTION ISOLATION LEVEL #{isolation_level}", "TRANSACTION"
end

#transaction_isolation_levels ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 66

def transaction_isolation_levels
  super.merge snapshot: "SNAPSHOT"
end

#use_database(database = nil) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 198

def use_database(database = nil)
  return if sqlserver_azure?

  name = SQLServer::Utils.extract_identifiers(database || @connection_options[:database]).quoted
  do_execute "USE #{name}" unless name.blank?
end

#user_options ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 205

def user_options
  return {} if sqlserver_azure?

  rows = select_rows("DBCC USEROPTIONS WITH NO_INFOMSGS", "SCHEMA")
  rows = rows.first if rows.size == 2 && rows.last.empty?
  rows.reduce(HashWithIndifferentAccess.new) do |values, row|
    if row.instance_of? Hash
      set_option = row.values[0].gsub(/\s+/, "_")
      user_value = row.values[1]
    elsif row.instance_of? Array
      set_option = row[0].gsub(/\s+/, "_")
      user_value = row[1]
    end
    values[set_option] = user_value
    values
  end
end

#user_options_dateformat ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 223

def user_options_dateformat
  if sqlserver_azure?
    select_value "SELECT [dateformat] FROM [sys].[syslanguages] WHERE [langid] = @@LANGID", "SCHEMA"
  else
    user_options["dateformat"]
  end
end

#user_options_isolation_level ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 231

def user_options_isolation_level
  if sqlserver_azure?
    sql = %(SELECT CASE [transaction_isolation_level]
            WHEN 0 THEN NULL
            WHEN 1 THEN 'READ UNCOMMITTED'
            WHEN 2 THEN 'READ COMMITTED'
            WHEN 3 THEN 'REPEATABLE READ'
            WHEN 4 THEN 'SERIALIZABLE'
            WHEN 5 THEN 'SNAPSHOT' END AS [isolation_level]
            FROM [sys].[dm_exec_sessions]
            WHERE [session_id] = @@SPID).squish
    select_value sql, "SCHEMA"
  else
    user_options["isolation_level"]
  end
end

#user_options_language ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 248

def user_options_language
  if sqlserver_azure?
    select_value "SELECT @@LANGUAGE AS [language]", "SCHEMA"
  else
    user_options["language"]
  end
end

#with_identity_insert_enabled(table_name) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 190

def with_identity_insert_enabled(table_name)
  table_name = quote_table_name(table_name)
  set_identity_insert(table_name, true)
  yield
ensure
  set_identity_insert(table_name, false)
end

#write_query?(sql) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 10

def write_query?(sql) # :nodoc:
  !READ_QUERY.match?(sql)
rescue ArgumentError # Invalid encoding
  !READ_QUERY.match?(sql.b)
end