What is the function of Redis keys * command

The Redis keys command finds all keys that match the specified pattern and uses wildcards to match. This command returns an array containing the matching key names.

Redis keys * command function

effect:

The Redis keys * command is used to find all keys in the Redis database that match the specified pattern.

Detailed description:

• This command accepts a pattern as a string as a parameter, which can use an asterisk (*) as a wildcard.
• Asterisk (*) matches any number of characters.
• The command returns an array containing all keys that match the specified pattern.

usage:

 <code>KEYS <pattern></pattern></code>

For example, to find all keys starting with "user:", you can use the following command:

 <code>KEYS user:*</code>

Return result:

The command returns an array containing all keys that match the pattern. The elements in the array are strings that represent the name of the key.

Notice:

• keys * command is a potential performance bottleneck because it scans the entire Redis database.
• This command should be used with caution, especially for large data sets.
• If you are interested only in specific keys, it is more efficient to use more specific patterns such as KEYS user:id .

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