Log Message:
Update pear-MDB2_Driver_pgsql package to 1.5.0b3.

1.5.0b3		2010-08-29 12:31 UTC

Changelog:

- fixed bug #16281: getTableFieldDefinition() does not recognize NULL defaults
  with datatype [Holger Schletz]
- fixed bug #16384: alterTable() does not remove NOT NULL constraints [Holger
  Schletz]
- fixed bug #16405: Compatibility issues with escaped strings [hschletz]

open todo items:
- enable pg_execute() once issues with bytea column are resolved
- use pg_result_error_field() to handle localized error messages (Request
  #7059)
- add option to use unnamed prepared statements (see
  http://www.postgresql.org/docs/current/static/protocol-flow.html "Extended
  Query")