Class: DB2::Environment

Inherits:
Object
  • Object
show all
Includes:
DB2Util
Defined in:
lib/active_record/vendor/db2.rb

Instance Method Summary collapse

Methods included from DB2Util

#check_rc, #free, #handle

Constructor Details

#initialize ⇒ Environment

Returns a new instance of Environment.



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# File 'lib/active_record/vendor/db2.rb', line 28

def initialize
  @handle_type = SQL_HANDLE_ENV
  rc, @handle = SQLAllocHandle(@handle_type, SQL_NULL_HANDLE)
  check_rc(rc)
end

Instance Method Details

#data_sources(buffer_length = 1024) ⇒ Object 



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# File 'lib/active_record/vendor/db2.rb', line 34

def data_sources(buffer_length = 1024)
  retval = []
  max_buffer_length = buffer_length

  a = SQLDataSources(@handle, SQL_FETCH_FIRST, SQL_MAX_DSN_LENGTH + 1, buffer_length)
  retval << [a[1], a[3]]
  max_buffer_length = [max_buffer_length, a[4]].max

  loop do
    a = SQLDataSources(@handle, SQL_FETCH_NEXT, SQL_MAX_DSN_LENGTH + 1, buffer_length)
    break if a[0] == SQL_NO_DATA_FOUND

    retval << [a[1], a[3]]
    max_buffer_length = [max_buffer_length, a[4]].max
  end

  if max_buffer_length > buffer_length
    get_data_sources(max_buffer_length)
  else
    retval
  end
end