daeqck898dvduj=> select ev_class::regclass, length(ev_action) rewrite_len,length(pg_get_viewdef(ev_class,true)) prettyprint_len, length(pg_get_viewdef(ev_class,false)) non_prettyprint_len from pg_rewrite  order by 2 desc limit 20;
                  ev_class                  | rewrite_len | prettyprint_len | non_prettyprint_len 
--------------------------------------------+-------------+-----------------+---------------------
 pg_seclabels                               |      138565 |           13528 |               13758
 information_schema.columns                 |      126787 |            6401 |                6642
 information_schema.usage_privileges        |       93863 |           11653 |               11939
 information_schema.attributes              |       83268 |            4264 |                4417
 information_schema.referential_constraints |       81762 |            2527 |                2653
 pg_statio_all_tables                       |       59617 |            1023 |                1061
 pg_stats                                   |       59331 |            2803 |                2899
 information_schema.domains                 |       54611 |            3206 |                3320
 information_schema.element_types           |       53049 |            5608 |                5762
 information_schema.routines                |       52333 |            7852 |                8089
 information_schema.column_privileges       |       49229 |            3883 |                3954
 pg_indexes                                 |       46717 |             458 |                 486
 information_schema.check_constraints       |       42132 |            1375 |                1443
 information_schema.tables                  |       37458 |            2122 |                2212
 pg_stat_all_indexes                        |       35426 |             508 |                 528
 pg_statio_all_indexes                      |       35412 |             490 |                 512
 information_schema.table_constraints       |       31882 |            3098 |                3231
 information_schema.column_udt_usage        |       31731 |            1034 |                1090
 information_schema.parameters              |       30497 |            3640 |                3750
 pg_stat_all_tables                         |       27193 |            1367 |                1387
(20 rows)