4 The table sql_features contains information about which formal features
5 defined in the SQL standard are supported by PostgreSQL. This is the
6 same information that is presented in Appendix D. There you can also
7 find some additional background information.
9 Table 35.46. sql_features Columns
15 feature_id character_data
17 Identifier string of the feature
19 feature_name character_data
21 Descriptive name of the feature
23 sub_feature_id character_data
25 Identifier string of the subfeature, or a zero-length string if not a
28 sub_feature_name character_data
30 Descriptive name of the subfeature, or a zero-length string if not a
33 is_supported yes_or_no
35 YES if the feature is fully supported by the current version of
38 is_verified_by character_data
40 Always null, since the PostgreSQL development group does not perform
41 formal testing of feature conformance
43 comments character_data
45 Possibly a comment about the supported status of the feature