17.25. PREPARE
Synopsis
PREPARE statement_name FROM statement
Description
Prepares a statement for execution later. Prepared statements are queries that are saved on a per-session basis with a given name. The statement can include parameters in place of literals to be filled in at execution time. Parameters are represented by question marks.
Examples
Prepare a select query:
PREPARE my_select1 FROM
SELECT * FROM nation;
Prepare a select query that includes parameters. The values to compare with
regionkey
and nationkey
will be filled in with the EXECUTE statement:
PREPARE my_select2 FROM
SELECT name FROM nation WHERE regionkey = ? AND nationkey < ?;
Prepare an insert query:
PREPARE my_insert FROM
INSERT INTO cities VALUES (1, 'San Francisco');
See Also
EXECUTE, DEALLOCATE PREPARE, DESCRIBE INPUT, DESCRIBE OUTPUT