Documentazione di PostgreSQL 9.0 > Client Interfaces > The Information Schema > sql_features
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34.36. sql_features

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 Appendice D, SQL Conformance. There you can also find some additional background information.

Tabella 34.34. sql_features Columns

NameData TypeDescription
feature_idcharacter_dataIdentifier string of the feature
feature_namecharacter_dataDescriptive name of the feature
sub_feature_idcharacter_dataIdentifier string of the subfeature, or a zero-length string if not a subfeature
sub_feature_namecharacter_dataDescriptive name of the subfeature, or a zero-length string if not a subfeature
is_supportedyes_or_no YES if the feature is fully supported by the current version of PostgreSQL™, NO if not
is_verified_bycharacter_data Always null, since the PostgreSQL™ development group does not perform formal testing of feature conformance
commentscharacter_dataPossibly a comment about the supported status of the feature

Documentazione di PostgreSQL 9.0 > Client Interfaces > The Information Schema > sql_features
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