diff options
Diffstat (limited to 'src/backend/utils/mmgr/README')
| -rw-r--r-- | src/backend/utils/mmgr/README | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/src/backend/utils/mmgr/README b/src/backend/utils/mmgr/README index 8c60ad48844..a91dfe3d760 100644 --- a/src/backend/utils/mmgr/README +++ b/src/backend/utils/mmgr/README @@ -1,4 +1,4 @@ -$PostgreSQL: pgsql/src/backend/utils/mmgr/README,v 1.8 2004/08/04 21:34:04 tgl Exp $ +$PostgreSQL: pgsql/src/backend/utils/mmgr/README,v 1.9 2006/09/07 22:52:01 tgl Exp $ Notes about memory allocation redesign -------------------------------------- @@ -202,13 +202,13 @@ data kept here is pending NOTIFY messages, which are sent at top-level commit, but only if the generating subtransaction did not abort. QueryContext --- this is not actually a separate context, but a global -variable pointing to the context that holds the current command's parse -and plan trees. (In simple-Query mode this points to MessageContext; -when executing a prepared statement it will point at the prepared -statement's private context.) Generally it is not appropriate for any -code to use QueryContext as an allocation target --- from the point of -view of any code that would be referencing the QueryContext variable, -it's a read-only context. +variable pointing to the context that holds the current command's parse tree. +(In simple-Query mode this points to MessageContext; when executing a +prepared statement it will point to the prepared statement's private context. +Note that the plan tree may or may not be in this same context.) +Generally it is not appropriate for any code to use QueryContext as an +allocation target --- from the point of view of any code that would be +referencing the QueryContext variable, it's a read-only context. PortalContext --- this is not actually a separate context either, but a global variable pointing to the per-portal context of the currently active |