Openedge Data Management: SQL Reference - Product ...

Syntax
ESQL elements and statements
• The USING clauses of EXECUTE and OPEN statements identify host language storage. The
values in this storage expand a statement string, replacing a substitution name or a
parameter marker. You can design your program to execute the same prepared statement
many times in a transaction, supplying different values for input variables for each
execution. If you COMMIT or ROLLBACK the transaction, you must PREPARE the statement
string again.
Authorization
Must have DBA privileges or authorization for the SQL statement being used.
Related statements
EXECUTE, OPEN, CLOSE, FETCH
SET CONNECTION
Switches the application from one established connection to another. This resumes the
connection associated with the specified connection_name, restoring the context of that
database connection to the same state it was in when suspended.
SET CONNECTION { 'connection_name' | DEFAULT } ;
connection_name
DEFAULT
The name of the connection as either a character literal or host variable. If the SET
CONNECTION statement omits a connection name, the default is the name of the database.
Connection names must be unique.
Sets the DEFAULT connection as the current connection.
Examples The first example shows how to establish a database as the current database:
EXEC SQL
SET CONNECTION 'conn_1' ;
The SET CONNECTION command sets the database associated with the connection named conn_1
to the status of current database. The connection named conn_1 must be associated with an
established connection. Use SET CONNECTION DEFAULT to set current the database associated
with the DEFAULT connection. In this example, the statement suspends the conn_1 connection,
which had been current:
EXEC SQL
SET CONNECTION DEFAULT ;
See also the last example for the DISCONNECT statement, which illustrates the CONNECT, SET
CONNECTION, and DISCONNECT statements in combination.
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