diff options
Diffstat (limited to 'src/backend/tcop/pquery.c')
| -rw-r--r-- | src/backend/tcop/pquery.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/src/backend/tcop/pquery.c b/src/backend/tcop/pquery.c index d0db7ad62c2..ce5e5e29ddb 100644 --- a/src/backend/tcop/pquery.c +++ b/src/backend/tcop/pquery.c @@ -447,18 +447,17 @@ FetchStatementTargetList(Node *stmt) * currently only honored for PORTAL_ONE_SELECT portals). Most callers * should simply pass zero. * - * The use_active_snapshot parameter is currently used only for - * PORTAL_ONE_SELECT portals. If it is true, the active snapshot will - * be used when starting up the executor; if false, a new snapshot will - * be taken. This is used both for cursors and to avoid taking an entirely - * new snapshot when it isn't necessary. + * The caller can optionally pass a snapshot to be used; pass InvalidSnapshot + * for the normal behavior of setting a new snapshot. This parameter is + * presently ignored for non-PORTAL_ONE_SELECT portals (it's only intended + * to be used for cursors). * * On return, portal is ready to accept PortalRun() calls, and the result * tupdesc (if any) is known. */ void PortalStart(Portal portal, ParamListInfo params, - int eflags, bool use_active_snapshot) + int eflags, Snapshot snapshot) { Portal saveActivePortal; ResourceOwner saveResourceOwner; @@ -500,8 +499,8 @@ PortalStart(Portal portal, ParamListInfo params, case PORTAL_ONE_SELECT: /* Must set snapshot before starting executor. */ - if (use_active_snapshot) - PushActiveSnapshot(GetActiveSnapshot()); + if (snapshot) + PushActiveSnapshot(snapshot); else PushActiveSnapshot(GetTransactionSnapshot()); |