Static invocation of a select-statement
A select-statement can be included as a part of the (non-executable) DECLARE CURSOR statement.
Such a statement is executed every time the cursor is opened by means of the (embedded) OPEN statement. After the cursor is open, the result table can be retrieved, one row at a time, by successive executions of the FETCH statement.
Used in this way, the select-statement can contain references to host variables. These references are effectively replaced by the values that the variables have when the OPEN statement executes.