Khan, Mahmood Ahram wrote: > But for some of the functions like btree index metapage,single btree > pages,bt page items are not clear to me.
Those functions display the contents of b-tree pages. They're really meant for debugging purposes. You'll need to understand the internal structure of a b-tree index to make sense of the output. The b-tree internals are explained in the source tree, in src/backend/access/nbtree/README, and the source files in the same directory. In fact, in 8.3, those functions have been moved to a new, separate contrib module called pageinspect, along with similar functions for debugging heap contents. Hopefully that makes the distinction between functions useful for DBAs and functions useful for developers more clear. -- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
