postgres 重做日志触发 table 个触发器

Question

假设由于某些损坏，postgres 触发了自动恢复。这导致 "redo start at 0/9A3F58" 就像我在数据库日志中一样。作为恢复的一部分，我想它会尝试插入 table 的记录。它是否会导致 table 的数据库插入触发器也被执行。我们正在使用 postgres 8.4。

来自 postgres 日志的片段：

2015-06-17 10:43:34 PDT LOG:  unexpected EOF on client connection
2015-06-17 10:43:34 PDT LOG:  unexpected EOF on client connection
2015-06-17 10:43:34 PDT LOG:  unexpected EOF on client connection
2015-06-17 10:43:34 PDT LOG:  unexpected EOF on client connection
2015-06-19 08:55:30 CDT LOG:  database system was interrupted; last known up at 2015-06-17 20:05:02 CDT
2015-06-19 08:55:30 CDT LOG:  database system was not properly shut down; automatic recovery in progress
2015-06-19 08:55:30 CDT LOG:  redo starts at 0/9A3F58
2015-06-19 08:55:30 CDT LOG:  incomplete startup packet
2015-06-19 08:55:30 CDT FATAL:  the database system is starting up
2015-06-19 08:55:30 CDT LOG:  record with zero length at 0/E90334
2015-06-19 08:55:30 CDT LOG:  redo done at 0/E90308
2015-06-19 08:55:30 CDT LOG:  last completed transaction was at log time     2015-06-17 12:43:32.471831-05
2015-06-19 08:55:31 CDT LOG:  database system is ready to accept connections
2015-06-19 08:55:31 CDT LOG:  autovacuum launcher started
2015-06-19 08:59:29 CDT LOG:  unexpected EOF on client connection
2015-06-19 08:59:29 CDT LOG:  unexpected EOF on client connection
2015-06-19 08:59:29 CDT LOG:  unexpected EOF on client connection

Answer 1

不，从预写日志重播绝对不会导致触发器触发。事实上，他们不能因为预写日志存储 block level 变化，而不是 row-level 变化，并且不知道哪个 SQL语句改变了哪一行。

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