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Merge pull request #6148 from matrix-org/erikj/find_next_generated

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Bound find_next_generated_user_id DB query.
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Erik Johnston 2019-10-02 16:09:02 +01:00 • committed by GitHub
commit 5d8ffdfe61
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2 changed files with 4 additions and 1 deletions
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changelog.d/6148.misc Normal file
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@ -0,0 +1 @@
Improve performance of `find_next_generated_user_id` DB query.

4
synapse/storage/registration.py
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@ -493,7 +493,9 @@ class RegistrationWorkerStore(SQLBaseStore):
"""
def _find_next_generated_user_id(txn):
txn.execute("SELECT name FROM users")
# We bound between '@1' and '@a' to avoid pulling the entire table
# out.
txn.execute("SELECT name FROM users WHERE '@1' <= name AND name < '@a'")
regex = re.compile(r"^@(\d+):")