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ClickHouse/docs/ru/query_language/table_functions/odbc.md

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odbc

Returns table that is connected via ODBC driver.

odbc(connection_settings, external_database, external_table)

Function Parameters

  • connection_settings — Name of the section with connection settings in the odbc.ini file.
  • external_database — Database in an external DBMS.
  • external_table — A name of the table in external_database.

To implement ODBC connection, ClickHouse uses the separate program clickhouse-odbc-bridge. ClickHouse starts this program automatically when it is required. The ODBC bridge program is installed by the same package with the ClickHouse server.

This function supports the Nullable data type (based on DDL of remote table that is queried).

Examples

select * from odbc('DSN=connection_settings_name', 'external_database_name', 'external_table_name')

Some examples of how to use external dictionaries through ODBC you can find in the ODBC section of external dictionaries configuration.

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