Postgresql 中文操作指南
37.48. sql_features #
表 sql_features 包含有关 PostgreSQL 支持的 SQL 标准中定义的哪些形式功能的信息。这是 Appendix D 中显示的相同信息。您还可以在此处找到一些其他背景信息。
The table sql_features contains information about which formal features defined in the SQL standard are supported by PostgreSQL. This is the same information that is presented in Appendix D. There you can also find some additional background information.
Table 37.46. sql_features Columns
Table 37.46. sql_features Columns
Column Type Description |
feature_id character_data Identifier string of the feature |
feature_name character_data Descriptive name of the feature |
sub_feature_id character_data Identifier string of the subfeature, or a zero-length string if not a subfeature |
sub_feature_name character_data Descriptive name of the subfeature, or a zero-length string if not a subfeature |
is_supported yes_or_no YES if the feature is fully supported by the current version of PostgreSQL, NO if not |
is_verified_by character_data Always null, since the PostgreSQL development group does not perform formal testing of feature conformance |
comments character_data Possibly a comment about the supported status of the feature |