PostgreSQL

36.43. `sql_features`
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36.43. `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 Appendix D. There you can also find some additional background information.

Table 36.41. sql_features Columns

Name Data Type Description

Name	Data 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

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

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36.43. sql_features

36.43. `sql_features`