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 46

def begin_db_transaction
  do_execute 'BEGIN TRANSACTION'
end

#begin_isolated_db_transaction(isolation) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 54

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

#case_insensitive_comparison(table, attribute, column, value) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 98

def case_insensitive_comparison(table, attribute, column, value)
  if column.case_sensitive?
    super
  else
    table[attribute].eq(value)
  end
end

#case_sensitive_comparison(table, attribute, column, value) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 90

def case_sensitive_comparison(table, attribute, column, value)
  if column.case_sensitive?
    table[attribute].eq(value)
  else
    super
  end
end

#case_sensitive_modifier(node, table_attribute) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 85

def case_sensitive_modifier(node, table_attribute)
  node = Arel::Nodes.build_quoted node, table_attribute
  Arel::Nodes::Bin.new(node)
end

#commit_db_transaction ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 64

def commit_db_transaction
  do_execute 'COMMIT TRANSACTION'
end

#create_savepoint(name = current_savepoint_name) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 74

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

#exec_delete(sql, name, binds) ⇒ Object 



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

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

#exec_insert(sql, name, binds, _pk = nil, _sequence_name = nil) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 22

def exec_insert(sql, name, binds, _pk = nil, _sequence_name = nil)
  id_insert = binds_have_identity_column?(binds)
  id_table  = table_name_from_binds(binds) if id_insert
  if id_insert && id_table
    with_identity_insert_enabled(id_table) { exec_query(sql, name, binds) }
  else
    exec_query(sql, name, binds)
  end
end

#exec_query(sql, name = 'SQL', binds = [], sqlserver_options = {}) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 18

def exec_query(sql, name = 'SQL', binds = [], sqlserver_options = {})
  sp_executesql(sql, name, binds)
end

#exec_rollback_db_transaction ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 68

def exec_rollback_db_transaction
  do_execute 'IF @@TRANCOUNT > 0 ROLLBACK 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 78

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

#exec_update(sql, name, binds) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 37

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

#execute(sql, name = nil) ⇒ Object 



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

def execute(sql, name = nil)
  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 108

def execute_procedure(proc_name, *variables)
  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 = @connection.execute(sql)
      options = { as: :hash, cache_rows: true, timezone: ActiveRecord::Base.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 }
    when :odbc
      results = []
      raw_connection_run(sql) do |handle|
        get_rows = lambda do
          rows = handle_to_names_and_values handle, fetch: :all
          rows.each_with_index { |r, i| rows[i] = r.with_indifferent_access }
          results << rows
        end
        get_rows.call
        get_rows.call while handle_more_results?(handle)
      end
      results.many? ? results : results.first
    end
  end
end

#newid_function ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 204

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 208

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 82

def release_savepoint(name = current_savepoint_name)
end

#select_rows(sql, name = nil, binds = []) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 6

def select_rows(sql, name = nil, binds = [])
  sp_executesql sql, name, binds, fetch: :rows
end

#set_transaction_isolation_level(isolation_level) ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 59

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

#supports_statement_cache? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 42

def supports_statement_cache?
  true
end

#transaction_isolation_levels ⇒ Object 



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# File 'lib/active_record/connection_adapters/sqlserver/database_statements.rb', line 50

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 150

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 156

def user_options
  return {} if sqlserver_azure?
  select_rows('dbcc useroptions', 'SCHEMA').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 171

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 179

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 196

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 142

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