sql:delete

Executes a SQL DELETE statement, returning no result.

delete($connection as javatype:java.sql.Connection, $table as xs:string, $predicate as xs:string) ➔ item()?

Arguments
	$connection	javatype:java.sql.Connection	A JDBC database connection established using sql:connect
	$table	xs:string	The database table from which rows are to be deleted
	$predicate	xs:string	A SQL predicate identifying the rows to be deleted
Result		item()?

Namespace

http://saxon.sf.net/sql

Saxon availability

Implemented since Saxon 9.9. Requires Saxon-PE or Saxon-EE. Available for Java only.

Notes on the Saxon implementation

Introduced in Saxon 9.9. Designed to supersede the extension instruction sql:delete. The saxon-sql-10.#.jar file, distributed alongside the main JAR file, must be added to the classpath when these SQL extension functions are used.

Details

The function executes a SQL DELETE statement, and returns no result.

The statement is constructed simply by concatenating the arguments: DELETE {$table} WHERE {$predicate}.

Although the declared return type is item()?, the function always returns an empty sequence. The declared return type is designed to prevent the optimizer making unwarranted assumptions.

Because this function is executed for its side-effects, it is recommended to invoke it using the saxon:do extension instruction.

Example:

<saxon:do action="sql:delete($connection, 'book', 'price > 20.00')"/>