Execute command


EXECUTE { SQLString | PreparedStatementIdentifier }
[ USING { String | Identifier } ]


Has several uses:
  • To execute an SQL command entered as SQLString, using the Execute String style. The String is passed to the connection without further examination or processing by ij. Normally, you execute SQL commands directly, not with the Execute command.
  • To execute a named command identified by PreparedStatementIdentifier. This must be previously prepared with the ij??Prepare command.
  • To execute either flavor of command when that command 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 command to be executed, so the number of columns in the Using's result set must match the number of input parameters in the Execute's statement. The results of each execution of the Execute statement are displayed as they are made. If the Using's result set contains no rows, the Execute's statement is not executed.

    When auto-commit mode is on, the Using's result set is closed upon the first execution of the Execute 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 
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;
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