The Execute command executes an SQL statement or a named prepared statement.
EXECUTE { SQLString | PreparedStatementIdentifier }
[ USING { String | Identifier } ]
The Execute command can be used in either of the following ways:
To execute either flavor of statement when that statement contains dynamic parameters, specify the values in the Using portion of the command. In this style, the SQLString or previously prepared PreparedStatementIdentifier is executed using the values supplied as String or Identifier. The Identifier in the Using clause must have a result set as its result. Each row of the result set is applied to the input parameters of the statement to be executed, so the number of columns in the Using clause's result set must match the number of input parameters in the Execute command's SQL statement. The results of each execution of the Execute command's SQL statement are displayed as they are made. If the Using clause's result set contains no rows, the Execute command's SQL statement is not executed.
When auto-commit mode is on, the Using clause's result set is closed upon the first execution of the Execute command's SQL statement. To ensure multiple-row execution of the Execute command, use the Autocommit command to turn auto-commit off.
ij> autocommit off;
ij> prepare menuInsert as 'INSERT INTO menu VALUES (?, ?, ?)';
ij> execute menuInsert using 'VALUES
(''entree'', ''lamb chop'', 14),
(''dessert'', ''creme brulee'', 6)';
1 row inserted/updated/deleted
1 row inserted/updated/deleted
ij> commit;
ij> connect 'jdbc:derby:firstdb;create=true';
ij> create table firsttable (id int primary key,
name varchar(12));
0 rows inserted/updated/deleted
ij> insert into firsttable values
(10,'TEN'),(20,'TWENTY'),(30,'THIRTY');
3 rows inserted/updated/deleted
ij> select * from firsttable;
ID |NAME
------------------------
10 |TEN
20 |TWENTY
30 |THIRTY
3 rows selected
ij> connect 'jdbc:derby:seconddb;create=true';
ij(CONNECTION1)> create table newtable (newid int primary key,
newname varchar(12));
0 rows inserted/updated/deleted
ij(CONNECTION1)> prepare src@connection0 as 'select * from firsttable';
ij(CONNECTION1)> autocommit off;
ij(CONNECTION1)> execute 'insert into newtable(newid, newname)
values(?,?)' using src@connection0;
1 row inserted/updated/deleted
1 row inserted/updated/deleted
1 row inserted/updated/deleted
ij(CONNECTION1)> commit;
ij(CONNECTION1)> select * from newtable;
NEWID |NEWNAME
------------------------
10 |TEN
20 |TWENTY
30 |THIRTY
3 rows selected
ij(CONNECTION1)> show connections;
CONNECTION0 - jdbc:derby:firstdb
CONNECTION1* - jdbc:derby:seconddb
ij(CONNECTION1)> disconnect connection0;
ij>