close

Close DuckDB native interface database connection

Since R2026a

Syntax

close(conn)

Description

close(conn) closes and invalidates the DuckDB native interface database connection to free up database and driver resources.

Examples

Close DuckDB Database Connection

Create a transient, in-memory DuckDB™ database connection by using the duckdb function.

conn = duckdb()

conn = 
  connection with properties:

                    Database: "memory"

  Database Properties:

                    ReadOnly: false
                  AutoCommit: "on"

  Catalog and Schema Information:

              DefaultCatalog: "memory"
                    Catalogs: "memory"
                     Schemas: "main"

  Database and Driver Information:

         DatabaseProductName: "DuckDB"
      DatabaseProductVersion: "v1.3.2"

Verify that the connection is open by using the isopen function and confirm that the output is 1.

isopen(conn)

ans = logical
   1

Close the connection by using the close function. Check that the connection is closed by using the isopen function and verify that the output is 0.

close(conn);
isopen(conn)

ans = logical
   0

Input Arguments

conn — DuckDB native interface database connection

connection object

DuckDB native interface database connection, specified as a connection object.

Version History

Introduced in R2026a