_resolve_column_info
_prune_unused_joins
_strip_cond_qualifiers
+ _strip_cond_qualifiers_from_array
_resolve_aliastypes_from_select_args
_execute
_do_query
_max_column_bytesize
_is_lob_type
+ _is_binary_lob_type
+ _is_text_lob_type
);
# the capability framework