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由 antirez 提交于
A new server.orig_commands table was added to the server structure, this contains a copy of the commant table unaffected by rename-command statements in redis.conf. A new API lookupCommandOrOriginal() was added that checks both tables, new first, old later, so that rewriteClientCommandVector() and friends can lookup commands with their new or original name in order to fix the client->cmd pointer when the argument vector is renamed. This fixes the segfault of issue #986, but does not fix a wider range of problems resulting from renaming commands that actually operate on data and are registered into the AOF file or propagated to slaves... That is command renaming should be handled with care.
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