The table sql_parts contains information about which of the several parts of the SQL standard are supported by PostgreSQL.
Table 33-34. sql_parts Columns
|feature_id||character_data||An identifier string containing the number of the part|
|feature_name||character_data||Descriptive name of the part|
|is_supported||character_data||YES if the part 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 part|