redis commands common ll

LL   (list long format)

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List keys

The usage is ll or ll pattern.

Field description

• type: Shows the key's data type. Data types are string/list/set/zset/hash/stream.
• key: Shows the key.
• value: For string, shows the value; for other data types, shows the number of values.
• last_update_time: Shows when the key was created or last updated.
  This field is not in the open source version; it is managed in the Enterprise version.
• expire_time: Shows the expiration time if it was set with the expire command.

• * : Matches any characters: h*llo -> hllo, heeeello, etc
• ? : Matches one character: h?llo -> hallo, hello, hxllo, etc
• [alphabet] : Matches a character in the brackets: h[ae]llo -> hallo, hello
  
• [^e] : Matches any character except those in the brackets: h[^e]llo -> hallo, hbllo, ... but hello is excluded.
  
• [a-c] : Matches a character range in the brackets: h[a-c]llo -> hallo, hbllo, hcllo
• \ : To use the special characters above (*?[^]) as literals, prefix them with \.

Specify a data type

You can specify a data type to list only those keys.
Specifying a data type is recommended.
Available data types are string, list, set, zset, hash, and stream.

Syntax

LL   [key_pattern]   [string|list|set|zset|hash|stream]   [COUNT count]

• Available since Ent 7.5.0.
• Time complexity is O(N). N is the number of all keys in the database, not the number of keys returned.
• An output (query) limit is set with the redis.conf ll-max parameter.
  If the number of keys is greater than or equal to ll-max, the following message is shown and the keys are not listed.
  "If the number of keys is greater than ll-max, the 'll' command cannot be executed.
  To execute, modify the 'CONFIG SET ll-max number' command.
  The number of keys can be checked with the 'dbsize' command, and the 'll-max' value can be checked with the 'CONFIG GET ll-max' command."
  You can change the value with the 'CONFIG SET ll-max number' command.
  On production servers, using the 'COUNT count' option is recommended.