Howdy. I have two tables that I'm joining together and using the result to create a temporary table. Performing the join operation works fine; it produces 0 rows (as expected). If I prepend "CREATE TEMP tmp_policyqueue AS" to the SELECT then it generates this error:
ERROR: could not read block 39 in file "base/16391/11937": read only 0 of 8192 bytes
$ psql
mdb=> CREATE TEMP TABLE tmp_policyqueue AS
mdb-> SELECT pq.* FROM policyqueue AS pq
mdb-> JOIN seed_progress AS sp ON pq.id=sp.polidx; ERROR: could not read block 40 in file "base/16391/11937": read only 0 of 8192 bytes
You'll also observe that the block number is changing each time I execute the command. I know very little about postgres internal structure so it may be irrelevant. I've left my database in this state should extra information be needed.
Thanks for any assist.
Chris