ClickHouse/docs/en/dicts/external_dicts_dict.md
2018-03-11 00:36:26 +01:00

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Configuring an external dictionary

The dictionary configuration has the following structure:

<dictionary>
    <name>dict_name</name>

    <source>
      <!-- Source configuration -->
    </source>

    <layout>
      <!-- Memory layout configuration -->
    </layout>

    <structure>
      <!-- Complex key configuration -->
    </structure>

    <lifetime>
      <!-- Lifetime of dictionary in memory -->
    </lifetime>
</dictionary>
  • name The identifier that can be used to access the dictionary. Use the characters [a-zA-Z0-9_\-].
  • source Source of the dictionary.
  • layout Location of the dictionary in memory.
  • structure Structure of the dictionary. A key and attributes that can be retrieved by this key.
  • lifetime How frequently to update dictionaries.