ClickHouse/docs/fr/query_language/dicts/external_dicts_dict.md
2020-03-30 15:48:55 +03:00

1.5 KiB
Raw Blame History

machine_translated
true

Configuration D'un dictionnaire externe

Si dictionary est configuré à l'aide d'un fichier xml, than dictionary configuration a la structure suivante:

<dictionary>
    <name>dict_name</name>

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

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

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

    <lifetime>
      <!-- Lifetime of dictionary in memory -->
    </lifetime>
</dictionary>

Correspondant DDL-requête a la structure suivante:

CREATE DICTIONARY dict_name
(
    ... -- attributes
)
PRIMARY KEY ... -- complex or single key configuration
SOURCE(...) -- Source configuration
LAYOUT(...) -- Memory layout configuration
LIFETIME(...) -- Lifetime of dictionary in memory
  • name The identifier that can be used to access the dictionary. Use the characters [a-zA-Z0-9_\-].
  • source — Source of the dictionary.
  • disposition — Dictionary layout in memory.
  • structure — Structure of the dictionary . A key and attributes that can be retrieved by this key.
  • vie — Frequency of dictionary updates.

Article Original