John Siracusa <[EMAIL PROTECTED]> writes: > 1. The query "select max(foo) from bar" where the column foo has an index. > Aren't indexes ordered? If not, an "ordered index" would be useful in this > situation so that this query, rather than doing a sequential scan of the > whole table, would just "ask the index" for the max value and return nearly > instantly.
http://www.postgresql.org/docs/current/static/functions-aggregate.html -Neil ---------------------------(end of broadcast)--------------------------- TIP 9: the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
