fcl-db: oracle:
- add support for ftSmallInt, ftLargeInt, ftFixedChar params
- add support for BINARY_FLOAT, BINARY_DOUBLE data types

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@27995 3ad0048d-3df7-0310-abae-a5850022a9f2