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EventTriggerTableRewrite crashed if there were table_rewrite triggers present, but there had not been when the calling command started. EventTriggerDDLCommandEnd called ddl_command_end triggers if present, even if there had been no such triggers when the calling command started, which would lead to a failure in pg_event_trigger_ddl_commands. In both cases, fix by doing nothing; it's better to wait till the next command when things will be properly initialized. In passing, remove an elog(DEBUG1) call that might have seemed interesting four years ago but surely isn't today. We found this because of intermittent failures in the buildfarm. Thanks to Alvaro Herrera and Andrew Gierth for analysis. Back-patch to 9.5; some of this code exists before that, but the specific hazards we need to guard against don't. Discussion: https://postgr.es/m/5767.1523995174@sss.pgh.pa.us |
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