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d0fe3046ee
Unlike the other pg_stat_get_backend* functions, pg_stat_get_backend_subxact() looks up the backend entry by using its integer argument as a 1-based index in an internal array. The other functions look for the entry with the matching session backend ID. These numbers often match, but that isn't reliably true. This commit resolves this discrepancy by introducing pgstat_get_local_beentry_by_backend_id() and using it in pg_stat_get_backend_subxact(). We cannot use pgstat_get_beentry_by_backend_id() because it returns a PgBackendStatus, which lacks the locally computed additions available in LocalPgBackendStatus that are required by pg_stat_get_backend_subxact(). Author: Ian Barwick Reviewed-by: Sami Imseih, Michael Paquier, Robert Haas Discussion: https://postgr.es/m/CAB8KJ%3Dj-ACb3H4L9a_b3ZG3iCYDW5aEu3WsPAzkm2S7JzS1Few%40mail.gmail.com Backpatch-through: 16 |
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