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| author | Niall Sheridan <nsheridan@gmail.com> | 2018-08-07 23:43:23 +0100 |
|---|---|---|
| committer | Niall Sheridan <nsheridan@gmail.com> | 2018-08-08 00:12:49 +0100 |
| commit | 60d005f8d174d21162cab2b029f74cfe2925acab (patch) | |
| tree | d67ab69f1724e9bc7346687aecb51391279048dd /vendor/google.golang.org/grpc/internal/envconfig | |
| parent | 30c64cb3292f55231bc20c365c2fe5d06d6d2369 (diff) | |
Change the primary key on the issued_certs table
In retrospect a primary key that has no relation to the certificate is preferred to using the certificate KeyID. The KeyID is also very large for a primary index.
This is a moderately tricky migration, especially for SQLite which has no means of altering the table in this fashion - it involves creating the new table and copying the data.
Order of commands also matters - index names are global in SQLite, so the `idx_expires_at` index needs to be created at the correct stages.
For MySQL migration the necessary steps are run as a single alter statement to minimise the risk of leaving the migration in an incomplete state if anything aborts.
When tested on a table with 250,000 rows (MySQL 5.7) the migration took 3 seconds to complete. As certificates will be requested infrequently the risk of prolonged locking is minimal.
Diffstat (limited to 'vendor/google.golang.org/grpc/internal/envconfig')
0 files changed, 0 insertions, 0 deletions