/usr/share/postgresql/10/extension/citus--6.2-1--6.2-2.sql is in postgresql-10-citus 7.0.3.PGDG-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | /* citus--6.2-1--6.2-2.sql */
SET search_path = 'pg_catalog';
CREATE FUNCTION citus_table_size(logicalrelid regclass)
RETURNS bigint
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$citus_table_size$$;
COMMENT ON FUNCTION citus_table_size(logicalrelid regclass)
IS 'get disk space used by the specified table, excluding indexes';
CREATE FUNCTION citus_relation_size(logicalrelid regclass)
RETURNS bigint
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$citus_relation_size$$;
COMMENT ON FUNCTION citus_relation_size(logicalrelid regclass)
IS 'get disk space used by the ''main'' fork';
CREATE FUNCTION citus_total_relation_size(logicalrelid regclass)
RETURNS bigint
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$citus_total_relation_size$$;
COMMENT ON FUNCTION citus_total_relation_size(logicalrelid regclass)
IS 'get total disk space used by the specified table';
RESET search_path;
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