More request method checks

Zend Data Cache returns null when record doesn't exist (reverted from commit 590121c4)

Update single row query function

Fixed the issue that Object/Component doesn't support using anonymous function as normal property values.

[WIP] Cubrid db support

http://jira.cubrid.org/browse/APIS-658

bit has special syntax for storing and retreiving so we'd need a
converter for that.
Storing 1 bit will result in one byte left padded on the disc so the
result of a query for boolean 0 will be 0x00 and for boolean 1 will be
0x80.