QuerySelect Collection Methods
In this section, we discuss the QuerySelect collection methods. The methods are discussed in alphabetical order.
Syntax
AddUnion()
Description
The AddUnion method adds a new QuerySelect object of type Union in the current QuerySelect collection. You can use AddUnion only with the first QuerySelect Collection because PeopleSoft Query doesn’t' support Unions for subqueries. All unions are considered children of the Main Select.
Parameters
None.
Returns
A reference to a QuerySelect object if successful. If the current QuerySelect Collection does not belong to the first Select statement, it returns NULL. If it fails, it returns NULL.
Example
&QryMainSel = &Query.QuerySelect;
&QryMainSelCol = &QryMainSel.QuerySelects;
&QryUnion = &QryMainSelCol.AddUnion();Syntax
DeleteQuerySelect(SelNumber)
Description
The DeleteQuerySelect method deletes the QuerySelect instance represented SelNumber.
Parameters
|
Field or Control |
Definition |
|---|---|
| SelNumber |
Specify the numeric value containing the Select Number of the QuerySelect that you want to delete. |
Returns
Returns 0 if successful.
Example
&QryMainSel = &Query.QuerySelect;
&QryMainSelCol = &QryMainSel.QuerySelects;
&QryMainSelCol.DeleteQuerySelect(3);Syntax
First()
Description
The First method returns the first child QuerySelect object in the current QuerySelect’s collection.
Parameters
None.
Returns
A reference to a QuerySelect object if successful, NULL otherwise.
Example
&MyChildQrySel = &MySelCollection.First();Syntax
Item(number)
Description
The Item method returns the QuerySelect object that exists at the number position in the current QuerySelect collection.
Parameters
|
Field or Control |
Definition |
|---|---|
| Number |
Specify the position number in the collection of the QuerySelect object that you want returned. |
Returns
A reference to a QuerySelect object if successful, NULL otherwise.
Example
For &I = 1 to &QrySelCol.Count;
&MyChildQrySel = &QrySelCol.Item(&I);
/* do processing */
End-For;Syntax
ItemBySelNum(SelNumber)
Description
The ItemBySelNum method returns the QuerySelect object specified by the Select Number. Each Select Statement in a Query Definition is identified by a unique select number.
Parameters
|
Field or Control |
Definition |
|---|---|
| SelNumber |
Specify the numeric value of the Select Number. |
Returns
A reference to a QuerySelect object if successful, NULL otherwise.
Example
&MyChildQuerySelect = &MySelCol.ItemBySelNum(3);Syntax
Next()
Description
The Next method returns the next QuerySelect object in the current QuerySelect collection. You can use this method only after you have used the First method: otherwise the system returns a NULL.
Parameters
None.
Returns
A reference to a QuerySelect object if successful, NULL otherwise.
Example
&MyChildQuerySelect = &MySelCol.Next();