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comment describing the Redis command table enhanced
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src/redis.c
28
src/redis.c
@ -70,9 +70,31 @@ double R_Zero, R_PosInf, R_NegInf, R_Nan;
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struct redisServer server; /* server global state */
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struct redisCommand *commandTable;
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/* Our command table. Command flags are expressed using strings where every
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* character represents a flag. Later the populateCommandTable() function will
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* take care of populating the real 'flags' field using this characters.
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/* Our command table.
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*
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* Every entry is composed of the following fields:
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*
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* name: a string representing the command name.
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* function: pointer to the C function implementing the command.
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* arity: number of arguments, it is possible to use -N to say >= N
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* sflags: command flags as string. See below for a table of flags.
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* flags: flags as bitmask. Computed by Redis using the 'sflags' field.
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* get_keys_proc: an optional function to get key arguments from a command.
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* This is only used when the following three fields are not
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* enough to specify what arguments are keys.
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* first_key_index: first argument that is a key
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* last_key_index: last argument that is a key
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* key_step: step to get all the keys from first to last argument. For instance
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* in MSET the step is two since arguments are key,val,key,val,...
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* microseconds: microseconds of total execution time for this command.
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* calls: total number of calls of this command.
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*
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* The flags, microseconds and calls fields are computed by Redis and should
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* always be set to zero.
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*
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* Command flags are expressed using strings where every character represents
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* a flag. Later the populateCommandTable() function will take care of
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* populating the real 'flags' field using this characters.
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*
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* This is the meaning of the flags:
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*
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