Re: Sort of a planner regression 8.3->8.4 (due to EXISTS inlining) and related stuff

Testschema:

ROLLBACK;
BEGIN;

CREATE TABLE a (   a_id serial PRIMARY KEY NOT NULL,   b_id integer
);
CREATE INDEX a__b_id ON a USING btree (b_id);


CREATE TABLE b (   b_id serial NOT NULL,   c_id integer
);
CREATE INDEX b__c_id ON b USING btree (c_id);


CREATE TABLE c (   c_id serial PRIMARY KEY NOT NULL,   value integer UNIQUE
);

INSERT INTO b (b_id, c_id)   SELECT g.i, g.i FROM generate_series(1, 50000) g(i);

INSERT INTO a(b_id)   SELECT g.i FROM generate_series(1, 50000) g(i);

COMMIT;
ANALYZE;