Improve performance of PostgreSQL for large databases.

[quassel.git] / src / core / SQL / PostgreSQL / 20 / select_messages.sql

diff --git a/src/core/SQL/PostgreSQL/20/select_messages.sql b/src/core/SQL/PostgreSQL/20/select_messages.sql
new file mode 100644 (file)
index 0000000..5bf6a24
--- /dev/null
+++ b/src/core/SQL/PostgreSQL/20/select_messages.sql
@@ -0,0 +1,7 @@
+SELECT messageid, time,  type, flags, sender, message
+FROM backlog
+JOIN sender ON backlog.senderid = sender.senderid
+WHERE bufferid = $1
+AND messageid <= (SELECT buffer.lastmsgid FROM buffer WHERE buffer.bufferid = $1)
+ORDER BY messageid DESC
+LIMIT $2