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Bug 400679 get last session query is joining against itself (could be faster) (r=dietrich, a=drivers)

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git-svn-id: svn://10.0.0.236/trunk@239101 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
dietrich%mozilla.com
2007-11-09 21:05:49 +00:00
parent eb93ad4c88
commit f0e3d2bd08
1 changed files with 3 additions and 3 deletions
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6
mozilla/toolkit/components/places/src/nsNavHistory.cpp
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@@ -345,9 +345,9 @@ nsNavHistory::Init()
{
nsCOMPtr<mozIStorageStatement> selectSession;
rv = mDBConn->CreateStatement(NS_LITERAL_CSTRING(
"SELECT MAX(session) FROM "
"(SELECT MAX(visit_date) AS visit_date FROM moz_historyvisits) maxvd "
"JOIN moz_historyvisits v ON maxvd.visit_date = v.visit_date"),
"SELECT MAX(session) FROM moz_historyvisits "
"WHERE visit_date = "
"(SELECT MAX(visit_date) from moz_historyvisits)"),
getter_AddRefs(selectSession));
NS_ENSURE_SUCCESS(rv, rv);
PRBool hasSession;