PostgreSQL 17.4 first five pages 5 rows, truncated=True pages per section 3 rows, truncated=False one row of a million 1 rows, truncated=True insert a page rejected: only one SELECT or VALUES query is allowed (42601) delete inside WITH rejected: the query uses a feature a cursor does not allow, such as a data-modifying WITH (0A000) function that writes rejected: the transaction is read-only (25006) read editor emails rejected: the role lacks the privilege (42501) slow query rejected: the query ran longer than 500 ms (57014) two statements rejected: only one SELECT or VALUES query is allowed (42601) turn off read-only for the session 1 rows, truncated=False function that writes, next call rejected: the transaction is read-only (25006) one 300,000-character value rejected: the result is larger than 200000 bytes; select fewer or shorter values send a notification 1 rows, truncated=False too many rows requested rejected: max_rows must be an integer from 1 to 200 role: read-only default after SET off role: insert with read-only off 42501: permission denied for table pages role: delete with read-only off 42501: permission denied for table pages role: read editors with read-only off 42501: permission denied for table editors role: create a large object with read-only off allowed wrote query-results.json