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Avoid updating the same rows multiple times with simple_update_many_txn. (#16609)

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simple_update_many_txn had a bug in it which would cause each
update to be applied twice.
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Patrick Cloke 2023-11-07 14:02:09 -05:00 committed by GitHub
parent 9738b1c497
commit 455ef04187
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3 changed files with 4 additions and 6 deletions
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1
changelog.d/16609.bugfix Normal file
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@ -0,0 +1 @@
Fix a long-standing bug where some queries updated the same row twice. Introduced in Synapse 1.57.0.

5
synapse/storage/database.py
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@ -2060,10 +2060,7 @@ class DatabasePool:
# List of tuples of (value values, then key values)
# (This matches the order needed for the query)
args = [tuple(x) + tuple(y) for x, y in zip(value_values, key_values)]
for ks, vs in zip(key_values, value_values):
args.append(tuple(vs) + tuple(ks))
args = [tuple(vv) + tuple(kv) for vv, kv in zip(value_values, key_values)]
# 'col1 = ?, col2 = ?, ...'
set_clause = ", ".join(f"{n} = ?" for n in value_names)

4
tests/storage/test_base.py
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@ -363,12 +363,12 @@ class SQLBaseStoreTestCase(unittest.TestCase):
self.mock_execute_batch.assert_called_once_with(
self.mock_txn,
"UPDATE tablename SET col3 = ? WHERE col1 = ? AND col2 = ?",
[("val3", "val1", "val2"), ("val3", "val1", "val2")],
[("val3", "val1", "val2")],
)
else:
self.mock_txn.executemany.assert_called_once_with(
"UPDATE tablename SET col3 = ? WHERE col1 = ? AND col2 = ?",
[("val3", "val1", "val2"), ("val3", "val1", "val2")],
[("val3", "val1", "val2")],
)
# key_values and value_values must be the same length.