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Re: How can I get the list of index(or other objects) which depends on a function

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2011/1/5 flying eagle <eagleinfly@xxxxxxxxx>
I want to get all the dependencies of a table, I know how to get the index list using sql,Âbut I don't know how to get the list of objects who using a function, for example:

CREATE OR REPLACE FUNCTION reverse_last_64(TEXT) RETURNS TEXT AS $$Â
SELECTÂ
array_to_string(Â
ÂARRAYÂ
( SELECT substring($1, s.i,1) FROM generate_series(length($1), greatest(length($1) - 64 + 1, 1), -1) AS s(i) ),Â
Â'');Â
$$ LANGUAGE SQL IMMUTABLE"

CREATE TABLE Test2(id BIGSERIAL PRIMARY KEY, name varchar(100))
CREATE INDEX idx_test2_name ON test2(reverse_last_64(name) varchar_pattern_ops)

drop functionÂreverse_last_64(TEXT) ;

will showÂ
ERROR: Âcannot drop function reverse_last_64(text) because other objects depend on it
DETAIL: Âindex idx_test2_name depends on function reverse_last_64(text)
HINT: ÂUse DROP ... CASCADE to drop the dependent objects too.

what I want to get is the list of index(or maybe other function) which using the function using sql.



I hope this will help you:

select * from pg_depend where refobjid = (select oid from pg_proc where proname='reverse_last_64');

http://www.postgresql.org/docs/9.0/interactive/catalog-pg-depend.html


greets,
Filip


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