{
    extern void plruby_require(char *);

    plruby_require("plruby/plruby_basic");
    rb_hash_aset(plruby_classes, INT2NUM(OIDOID), rb_cFixnum);
    rb_hash_aset(plruby_classes, INT2NUM(INT2OID), rb_cFixnum);
    rb_hash_aset(plruby_classes, INT2NUM(INT4OID), rb_cFixnum);
    rb_hash_aset(plruby_classes, INT2NUM(INT8OID), rb_cFixnum);

    rb_hash_aset(plruby_classes, INT2NUM(FLOAT4OID), rb_cFloat);
    rb_hash_aset(plruby_classes, INT2NUM(FLOAT8OID), rb_cFloat);
    rb_hash_aset(plruby_classes, INT2NUM(CASHOID), rb_cFloat);
    rb_hash_aset(plruby_classes, INT2NUM(NUMERICOID), rb_cFloat);

    rb_hash_aset(plruby_classes, INT2NUM(TIMESTAMPOID), rb_cTime);
    rb_hash_aset(plruby_classes, INT2NUM(TIMESTAMPTZOID), rb_cTime);
    rb_hash_aset(plruby_classes, INT2NUM(ABSTIMEOID), rb_cTime);
    rb_hash_aset(plruby_classes, INT2NUM(DATEOID), rb_cTime);
    rb_hash_aset(plruby_classes, INT2NUM(RELTIMEOID), rb_cTime);
    rb_hash_aset(plruby_classes, INT2NUM(INTERVALOID), rb_cTime);
    rb_hash_aset(plruby_classes, INT2NUM(TIMETZOID), rb_cTime);
    rb_hash_aset(plruby_classes, INT2NUM(TIMEOID), rb_cTime);

    rb_hash_aset(plruby_classes, ULONG2NUM(BYTEAOID), rb_cString);
}