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Don't fetch redaction and rejection stuff for each event, so we can use index only scan

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This commit is contained in:
Erik Johnston 2015-05-13 14:39:05 +01:00
parent 02590c3e1d
commit 6edff11a88
2 changed files with 24 additions and 6 deletions
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23
synapse/storage/_base.py
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@ -918,10 +918,10 @@ class SQLBaseStore(object):
start_time = update_counter("event_cache", start_time)
sql = (
"SELECT e.internal_metadata, e.json, r.event_id, rej.reason "
"SELECT e.internal_metadata, e.json, r.redacts, rej.event_id "
"FROM event_json as e "
"LEFT JOIN rejections as rej USING (event_id) "
"LEFT JOIN redactions as r ON e.event_id = r.redacts "
"LEFT JOIN rejections as rej on rej.event_id = e.event_id "
"WHERE e.event_id = ? "
"LIMIT 1 "
)
@ -967,6 +967,14 @@ class SQLBaseStore(object):
internal_metadata = json.loads(internal_metadata)
start_time = update_counter("decode_internal", start_time)
if rejected_reason:
rejected_reason = self._simple_select_one_onecol_txn(
txn,
table="rejections",
keyvalues={"event_id": rejected_reason},
retcol="reason",
)
ev = FrozenEvent(
d,
internal_metadata_dict=internal_metadata,
@ -977,12 +985,19 @@ class SQLBaseStore(object):
if check_redacted and redacted:
ev = prune_event(ev)
ev.unsigned["redacted_by"] = redacted
redaction_id = self._simple_select_one_onecol_txn(
txn,
table="redactions",
keyvalues={"redacts": ev.event_id},
retcol="event_id",
)
ev.unsigned["redacted_by"] = redaction_id
# Get the redaction event.
because = self._get_event_txn(
txn,
redacted,
redaction_id,
check_redacted=False
)

7
synapse/storage/state.py
View file

@ -85,8 +85,10 @@ class StateStore(SQLBaseStore):
def fetch_events(txn, events):
sql = (
"SELECT e.internal_metadata, e.json "
"SELECT e.internal_metadata, e.json, r.redacts, rej.event_id "
" FROM event_json as e"
" LEFT JOIN rejections as rej USING (event_id)"
" LEFT JOIN redactions as r ON e.event_id = r.redacts"
" WHERE e.event_id IN (%s)"
) % (",".join(["?"]*len(events)),)
@ -95,7 +97,8 @@ class StateStore(SQLBaseStore):
return [
self._get_event_from_row_txn(
txn, row[0], row[1], None
txn, row[0], row[1], row[2],
rejected_reason=row[3],
)
for row in rows
]