## DISCONNECT

DISCONNECT — terminate a database connection

## Synopsis

```
DISCONNECT connection_name
DISCONNECT [ CURRENT ]
DISCONNECT DEFAULT
DISCONNECT ALL

```

## Description

`DISCONNECT` closes a connection (or all connections) to the database.

## Parameters

*`connection_name`*

 A database connection name established by the `CONNECT` command.

`CURRENT`

 Close the “current” connection, which is either the most recently opened connection, or the connection set by the `SET CONNECTION` command. This is also the default if no argument is given to the `DISCONNECT` command.

`DEFAULT`

 Close the default connection.

`ALL`

 Close all open connections.

## Examples

```
int
main(void)
{
    EXEC SQL CONNECT TO testdb AS DEFAULT USER testuser;
    EXEC SQL CONNECT TO testdb AS con1 USER testuser;
    EXEC SQL CONNECT TO testdb AS con2 USER testuser;
    EXEC SQL CONNECT TO testdb AS con3 USER testuser;

    EXEC SQL DISCONNECT CURRENT;  /* close con3          */
    EXEC SQL DISCONNECT DEFAULT;  /* close DEFAULT       */
    EXEC SQL DISCONNECT ALL;      /* close con2 and con1 */

    return 0;
}

```

## Compatibility

`DISCONNECT` is specified in the SQL standard.

## See Also

[CONNECT](ecpg-sql-connect.html), [SET CONNECTION](ecpg-sql-set-connection.html)