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

[flying eagle <eagleinfly@xxxxxxxxx>]

ThanksÂFilip RembiaÅkowski, that'sÂexactlyÂwhat I want.

2011/1/6 Filip RembiaÅkowski <plk.zuber@xxxxxxxxx>

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

-- 
Xu Wei

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