| sql_language_source | character_data | The name of the source of the language definition; always
       ISO 9075, that is, the SQL standard | 
| sql_language_year | character_data | The year the standard referenced in
       sql_language_source was approved; currently
       2003 | 
| sql_language_conformance | character_data | The standard conformance level for the language binding.  For
       ISO 9075:2003 this is always CORE. | 
| sql_language_integrity | character_data | Always null (This value is relevant to an earlier version of the SQL standard.) | 
| sql_language_implementation | character_data | Always null | 
| sql_language_binding_style | character_data | The language binding style, either DIRECT or
       EMBEDDED | 
| sql_language_programming_language | character_data | The programming language, if the binding style is
       EMBEDDED, else null.  PostgreSQL only
       supports the language C. |