Re: Postgres Full Text Search Jsonb Array column does not search for first row

On Tue, 2019-11-26 at 13:37 +0200, Dmytro Zhluktenko wrote:
> Pgsql is unable to perform indexed full text search onto jsonb column containing an array when looking for the first row in the table.
> 
> Any ideas why this is happening?
>  
> CREATE OR REPLACE FUNCTION cp.make_tsvector(in_t cp."Repro")
>  RETURNS tsvector
>  LANGUAGE plpgsql
>  IMMUTABLE
> 
> [...] 
>  
> CREATE INDEX repro_fts_idx ON cp."Repro" USING gin (cp.make_tsvector(cp."Repro".*)) WITH (fastupdate=off, gin_pending_list_limit='64');
>  
> [...]
>
> -- explain analyze
> SELECT *
>  FROM "cp"."Repro" x where cp.make_tsvector(x) @@ 'sup:*'::tsquery

One possibility is that there ar just too few rows in the table.

SET enable_seqscan = off;

and then try again.

If that is not the problm, please provide EXPLAIN (ANALYZE, BUFFERS) output for
the query.

Yours,
Laurenz Albe
-- 
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