When using row level security, GIN and GIST indexes appear to get ignored.
Is this expected behavior? Can I change the query to get PostgreSQL using
the index? For example, with RLS enabled, this query:

select * from search where search like '%yo'

Creates this query plan:
"Seq Scan on search  (cost=0.00..245.46 rows=1 width=163)"
"  Filter: (((tenant_name)::name = CURRENT_USER) AND (search ~~
'%yo'::text))"

Running this same query with the owner of the table, thereby disabling RLS,
the index gets used as expected:
"Bitmap Heap Scan on search  (cost=4.49..96.33 rows=44 width=163)"
"  Recheck Cond: (search ~~ '%yo'::text)"
"  ->  Bitmap Index Scan on search__gist  (cost=0.00..4.48 rows=44 width=0)"
"        Index Cond: (search ~~ '%yo'::text)"

I see the same behavior with more complex queries, switching to GIN index,
more complex RLS rules, using word_similarity instead of like, using full
text search and larger data sets (e.g. 100k rows). This is on PostgreSQL
v11.1 on Windows 10.

-- 
*Derek*
+1 (415) 754-0519 | derek.h...@gmail.com | Skype: derek.hans

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