Changeset: 9eb98212aa3a for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/9eb98212aa3a
Modified Files:
sql/storage/bat/bat_storage.c
Branch: Jun2020
Log Message:
make sure only large enough tables are 'snapshoted'
diffs (29 lines):
diff --git a/sql/storage/bat/bat_storage.c b/sql/storage/bat/bat_storage.c
--- a/sql/storage/bat/bat_storage.c
+++ b/sql/storage/bat/bat_storage.c
@@ -2389,6 +2389,7 @@ tr_update_delta( sql_trans *tr, sql_delt
/* for cleared tables the bid is reset */
if (cbat->bid == 0) {
+ assert(cbat->cleared);
cbat->bid = obat->bid;
if (cbat->bid)
temp_dup(cbat->bid);
@@ -2421,11 +2422,13 @@ tr_update_delta( sql_trans *tr, sql_delt
cbat->cached = NULL;
if (!obat->bid) {
cur = temp_descriptor(obat->ibid);
- obat->bid = obat->ibid;
- obat->cnt = obat->ibase = BATcount(cur);
- obat->ibid = e_bat(cur->ttype);
+ if (BATcount(cur) > SNAPSHOT_MINSIZE) {
+ obat->bid = obat->ibid;
+ obat->cnt = obat->ibase = BATcount(cur);
+ obat->ibid = e_bat(cur->ttype);
+ obat->cleared = 0;
+ }
bat_destroy(cur);
- obat->cleared = 0;
}
return ok;
}
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