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Parses Redis commands to get command keys.
COMMAND output is used to determine key locations.
Commands that do not have a predefined key location are flagged with
'movablekeys', and these commands' keys are determined by the command
'COMMAND GETKEYS'.
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Get the keys from the passed command.
NOTE: Due to a bug in redis<7.0, this function does not work properly
for EVAL or EVALSHA when the `numkeys` arg is 0.
- issue: https://github.com/redis/redis/issues/9493
- fix: https://github.com/redis/redis/pull/9733
So, don't use this function with EVAL or EVALSHA.
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NOTE: Due to a bug in redis<7.0, this function does not work properly
for EVAL or EVALSHA when the `numkeys` arg is 0.
- issue: https://github.com/redis/redis/issues/9493
- fix: https://github.com/redis/redis/pull/9733
So, don't use this function with EVAL or EVALSHA.
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Get the keys from pubsub command.
Although PubSub commands have predetermined key locations, they are not
supported in the 'COMMAND's output, so the key positions are hardcoded
in this method
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