ClickHouse/docs/en/sql-reference/table-functions/dictionary.md

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54	dictionary function

dictionary

Displays the dictionary data as a ClickHouse table. Works the same way as Dictionary engine.

Syntax

dictionary('dict')

Arguments

• dict — A dictionary name. String.

Returned value

A ClickHouse table.

Example

Input table dictionary_source_table:

┌─id─┬─value─┐
│  0 │     0 │
│  1 │     1 │
└────┴───────┘

Create a dictionary:

CREATE DICTIONARY new_dictionary(id UInt64, value UInt64 DEFAULT 0) PRIMARY KEY id
SOURCE(CLICKHOUSE(HOST 'localhost' PORT tcpPort() USER 'default' TABLE 'dictionary_source_table')) LAYOUT(DIRECT());

Query:

SELECT * FROM dictionary('new_dictionary');

Result:

┌─id─┬─value─┐
│  0 │     0 │
│  1 │     1 │
└────┴───────┘

See Also

• Dictionary engine