CREATE QUERY statement

Creates a dynamic query.

Syntax

CREATE QUERY handle
 [ IN WIDGET-POOL widget-pool-name ]

handle

A variable of type HANDLE that represents the handle of the query object.

IN WIDGET-POOL widget-pool-name

An expression of type CHARACTER that evaluates, at run time, to the name of the widget pool that contains the dynamic query.

Note: Widget pool names are not case-sensitive.

Example

The following example creates a dynamic query with a static buffer and a dynamic predicate (WHERE clause) which is resolved at run time:

r-crtqry.p

/* r-crtqry.p */

DEFINE VARIABLE hQuery  AS HANDLE  NO-UNDO.
DEFINE VARIABLE iNumVar AS INTEGER NO-UNDO INITIAL 10.

CREATE QUERY hQuery.

hQuery:SET-BUFFERS(BUFFER Customer:HANDLE). 
hQuery:QUERY-PREPARE("FOR EACH Customer WHERE Customer.CustNum < " +
  STRING(iNumVar)).
hQuery:QUERY-OPEN.

REPEAT WITH FRAME y:
  hQuery:GET-NEXT().
  IF hQuery:QUERY-OFF-END THEN LEAVE.
  DISPLAY 
    Customer.CustNum
    Customer.Name FORMAT "x(30)"
    Customer.City FORMAT "X(20)".
END.

hQuery:QUERY-CLOSE()
DELETE OBJECT hQuery.

Note

• CREATE-QUERY must be followed by the QUERY-PREPARE( ) and QUERY-OPEN() methods before the query can be run.

See also

CREATE BUFFER statement, DEFINE QUERY statement, QUERY-OPEN( ) method, QUERY-PREPARE( ) method