Hello, I'm new to postgresql and during testing for a script I've found some curious things. If I do the following things a bad dump will be created that can't be restored (using pgadmin3, pg_dump and pg_restore or psql). There's also a issue that pgadmin crash. In pgadmin3 do 1) Create a new db ('test_dump') 2) Create a new schema ('test_dump') 3) From schema 'pg_catalog' copy the lines from CREATE OPERATOR <(... for <(abstime,abstime), <=(abstime,abstime), =(abstime,abstime), >(abstime,abstime), >=(abstime,abstime) and paste it in the query window. Write the schema name 'test_dump.' before the operator sign and execute the query. I've done this once for each operator. 4) Then copy the lines for operator class 'abstime_ops(btree)' from schema 'pg_catalog' and paste it in the query window. Write the schema name 'test_dump.' before the class and remove the 'default'. Then execute the query. If you click on the created operator class in schema 'test_dump' you'll get a error message box or on windows pgAdmin will crash. If you create a dump (pg_dump) of this schema and try to restore it you'll get a error from pg_restore or psql. daniel@artus ~ $ psql -d test_dump -f testdump.sql -U postgres SET SET SET CREATE SCHEMA SET psql:testdump.sql:29: ERROR: syntax error at or near ">" at character 123 psql:testdump.sql:29: LINE 5: COMMUTATOR = pg_catalog.>, psql:testdump.sql:29: ^ psql:testdump.sql:43: ERROR: syntax error at or near ">=" at character 124 psql:testdump.sql:43: LINE 5: COMMUTATOR = pg_catalog.>=, psql:testdump.sql:43: ^ psql:testdump.sql:62: ERROR: syntax error at or near "=" at character 123 psql:testdump.sql:62: LINE 5: COMMUTATOR = pg_catalog.=, psql:testdump.sql:62: ^ psql:testdump.sql:76: ERROR: syntax error at or near "<" at character 123 psql:testdump.sql:76: LINE 5: COMMUTATOR = pg_catalog.<, psql:testdump.sql:76: ^ psql:testdump.sql:90: ERROR: syntax error at or near "<=" at character 124 psql:testdump.sql:90: LINE 5: COMMUTATOR = pg_catalog.<=, psql:testdump.sql:90: ^ CREATE OPERATOR CLASS dw@artus ~ $ > daniel@aruts> postmaster --version > postmaster (PostgreSQL) 8.0.4 pgadmin3 version 1.4.1 greetings, Daniel Whitter