Method _comment_query

lib/sqlalchemy/dialects/postgresql/base.py:5315–5340

(self, schema, has_filter_names, scope, kind)

    @lru_cache()
    def _comment_query(self, schema, has_filter_names, scope, kind):
        relkinds = self._kind_to_relkinds(kind)
        query = (
            select(
                pg_catalog.pg_class.c.relname,
                pg_catalog.pg_description.c.description,
            )
            .select_from(pg_catalog.pg_class)
            .outerjoin(
                pg_catalog.pg_description,
                sql.and_(
                    pg_catalog.pg_class.c.oid
                    == pg_catalog.pg_description.c.objoid,
                    pg_catalog.pg_description.c.objsubid == 0,
                    pg_catalog.pg_description.c.classoid
                    == sql.func.cast(class="st">"pg_catalog.pg_class", REGCLASS),
                ),
            )
            .where(self._pg_class_relkind_condition(relkinds))
        )
        query = self._pg_class_filter_scope_schema(query, schema, scope)
        if has_filter_names:
            query = query.where(
                pg_catalog.pg_class.c.relname.in_(bindparam(class="st">"filter_names"))
            )
        return query

    def get_multi_table_comment(
        self, connection, schema, filter_names, scope, kind, **kw