I have a php application that needs to query the PK of a table - I'm
currently using this from the information_schema views:
SELECT column_name
FROM information_schema.table_constraints tc
INNER JOIN information_schema.constraint_column_usage ccu
ON tc.constraint_name = ccu.constraint_name
AND tc.constraint_schema = ccu.constraint_schema
WHERE constraint_type = 'PRIMARY KEY'
AND tc.table_name = '$table'
AND tc.table_schema = '$schema'
This is an extremely slow query tho.
The top/bottom of my EXPLAIN ANALYZE (8.1.9):
Nested Loop (cost=22.20..342.24 rows=1 width=64) (actual
time=68985.008..68988.784 rows=1 loops=1)
Join Filter: ("inner".oid = "outer".relnamespace)
-> Nested Loop (cost=22.20..341.15 rows=1 width=68) (actual
time=68984.922..68988.694 rows=1 loops=1)
<snip about 60 rows>
Total runtime: 68989.637 ms
I can put the full explain output on the web if it's useful.
Curious if there is a better/cheaper way to get the data I'm looking
for though?
Thanks,
Josh
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