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73
** Printout a generic message with the database
** error string in it.
*/
Message(’Insert failed because of ’||dbmserrtext);
END IF;
END IF;
END;
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DEBUG_MODE built-in
Description
Toggles debug mode on and off in a menu. When debug mode is on in a menu, Form Builder issues an
appropriate message when a menu item command executes.
Syntax
PROCEDURE DEBUG_MODE;
Built-in Type   unrestricted procedure
Enter Query Mode  yes
Parameters
none
DEBUG_MODE restrictions
The DEBUG_MODE applies only to a menu module.  It does not place the form in Debug Mode.
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DEFAULT_VALUE built-in
Description
Copies an indicated value to an indicated variable if the variable’s current value is NULL.  If the
variable’s current value is not NULL, DEFAULT_VALUE does nothing. Therefore, for text items this
built-in works identically to using the COPY built-in on a NULL item.  If the variable is an undefined
global variable, Form Builder creates the variable.
Syntax
PROCEDURE DEFAULT_VALUE
(
value_string 
VARCHAR2
,
   variable_name 
VARCHAR2);
Built-in Type   unrestricted procedure
Enter Query Mode  yes
Parameters
value_string
A valid VARCHAR2 string, variable, or text item containing a valid string.
variable_name
A valid variable, global variable, or text item name.  The data type of the
variable_name is VARCHAR2.  Any object passed as an argument to this
built-in must be enclosed in single quotes.
DEFAULT_VALUE restrictions
The DEFAULT_VALUE built-in is not related to the Initial Value item property.
DEFAULT_VALUE examples
/*   
** Built-in:  DEFAULT_VALUE
** Example:   Make sure a Global variable is defined by
**           assigning some value to it with Default_Value
*/
BEGIN
/*
** Default the value of GLOBAL.Command_Indicator if it is
** NULL or does not exist.
*/
Default_Value(’***’,’global.command_indicator’);
/*
** If the global variable equals the string we defaulted
** it to above, then it must have not existed before
*/
IF :Global.Command_Indicator = ’***’ THEN
Message(’You must call this screen from the Main Menu’);
RAISE Form_trigger_Failure;
END IF;
END;
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76
DELETE_GROUP built-in
Description
Deletes a programmatically created record group.
Syntax
PROCEDURE DELETE_GROUP
(
recordgroup_id  
RecordGroup);   
PROCEDURE DELETE_GROUP
(
recordgroup_name  
VARCHAR2);
Built-in Type  unrestricted procedure
Enter Query Mode  yes
Parameters
recordgroup_id
The unique ID that Form Builder assigns when it creates the group.  The
data type of the ID is RecordGroup.
recordgroup_name
The name you gave to the record group when creating it.  The data type of
the name is VARCHAR2.
DELETE_GROUP restrictions
This built-in cannot be used to delete a record group that was created at design time.
DELETE_GROUP examples
/*   
** Built-in:  DELETE_GROUP
** Example:   Delete a programmatically created record group
*/
PROCEDURE Remove_Record_Group( rg_name VARCHAR2 ) IS
rg_id RecordGroup;
BEGIN
/*
** Make sure the Record Group exists before trying to
** delete it.
*/
rg_id := Find_Group( rg_name );
IF NOT Id_Null(rg_id) THEN
Delete_Group( rg_id );
END IF;
END;
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77
DELETE_GROUP_ROW built-in
Description
Deletes the indicated row or all rows of the given record group.  Form Builder automatically decrements
the row numbers of all rows that follow a deleted row.  When rows are deleted, the appropriate memory
is freed and available to Form Builder.
If you choose to delete all rows of the group by supplying the  ALL_ROWS constant, Form Builder
deletes the rows, but the group still exists until you perform the DELETE_GROUP subprogram.
When a single row is deleted, subsequent rows are renumbered so that row numbers remain contiguous.
Syntax
PROCEDURE DELETE_GROUP_ROW
(
recordgroup_id  
RecordGroup,
   row_number      
NUMBER);   
PROCEDURE DELETE_GROUP_ROW
(
recordgroup_name  
VARCHAR2,
   row_number        
NUMBER);
Built-in Type  unrestricted procedure
Enter Query Mode  yes
Parameters
recordgroup_id
The unique ID that Form Builder assigns the group when it creates it.  The
data type of the ID is RecordGroup.
recordgroup_name
The name you gave to the record group when you created it.  The data type
of the name is VARCHAR2.
row_number
Specifies the row to be deleted from the record group.  Rows are
automatically numbered from 1 to n.  Row number parameter data type is
NUMBER.
ALL_ROWS  Specifies that Form Builder is to delete all rows without
deleting the record group.  ALL_ROWS is a constant.
DELETE_GROUP_ROW restrictions
This built-in cannot be used to delete rows from a static record group.
DELETE_GROUP_ROW examples
/*   
** Built-in:  DELETE_GROUP_ROW
** Example:   Delete certain number of records from the tail
**            of the specified record group.
*/
PROCEDURE Delete_Tail_Records( recs_to_del NUMBER,
rg_name VARCHAR2 ) IS
rg_id     RecordGroup;
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78
rec_count NUMBER;
BEGIN
/*
** Check to see if Record Group exists
*/
rg_id := Find_Group( rg_name );
/*
** Get a count of the records in the record group
*/
rec_Count := Get_Group_Row_Count( rg_id );
IF rec_Count < recs_to_del THEN
Message(’There are only ’||TO_CHAR(rec_Count)||
’ records in the group.’);
RAISE Form_trigger_Failure;
END IF;
/*
** Loop thru and delete the last ’recs_to_del’ records
*/
FOR j IN 1..recs_to_del LOOP
Delete_Group_Row( rg_id, rec_Count - j + 1 );
END LOOP;
END;
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79
DELETE_LIST_ELEMENT built-in
Description
Deletes a specific list element from a list item.
Syntax
PROCEDURE DELETE_LIST_ELEMENT
(
list_name   
VARCHAR2
,
   list_index  
NUMBER);
PROCEDURE DELETE_LIST_ELEMENT
(
list_id
ITEM
   list_index  
NUMBER);
Built-in Type  unrestricted procedure
Enter Query Mode  yes
Parameters
list_id
Specifies the unique ID that Form Builder assigns when it creates the list
item.  Use the FIND_ITEM built-in to return the ID to an appropriately
typed variable.  The data type of the ID is ITEM.
list_name
The name you gave to the list item when you created it.  The data type of
the name is VARCHAR2.
list_index
Specifies the list index value.  The list index is 1 based.
Usage Notes
•  Do not use the DELETE_LIST_ELEMENT built-in if the Mapping of Other Values property is
defined and there are queried records in the block.  Doing so may cause Form Builder to be unable
to display records that have already been fetched.
For example, assume that a list item contains the values A, B, and C and the Mapping of Other Values
property is defined.  Assume also that these values have been fetched from the database (a query is
open).  At this point, if you delete B from the list using DELETE_LIST_ELEMENT, an error will
occur because Form Builder will attempt to display the previously fetched values (A, B, and C), but
will be unable to because B was deleted from the list.
Before deleting a list element, close any open queries.  Use the ABORT_QUERY built-in to close an
open query.
Note:  A list does not contain an other values element if none was specified at design time or if it was
programmatically deleted from the list at runtime.
DELETE_LIST_ELEMENT restrictions
For a Poplist or T-list-style list item, Form Builder returns
error FRM-41331: Could not delete element from <list_item> if
you attempt to delete the default value element.
The default value element is the element whose label or value was specified at design time for the Initial
Value property setting.
80
For a Combobox list item, you can delete the default value element only if the Initial Value property was
set to an actual value, rather than an element label.
For a base table Poplist or T-list list item, Form Builder
returns error FRM-41331: Could not delete element from
<list_item> if you:
•  attempt to delete the other values element when the block contains queried or changed records.
•  attempt to delete any element from a list that does not contain an other values element when the
block contains queried or changed records.
Note:  The block status is QUERY when a block contains queried records.  The block status is
CHANGED when a block contains records that have been either inserted or updated (queried records
have been modified).
DELETE_LIST_ELEMENT examples
/*
**  Built-in:  DELETE_LIST_ELEMENT
**  Example:   See ADD_LIST_ELEMENT
*/
81
DELETE_PARAMETER built-in
Description
Deletes the parameter with the given key from the parameter list.
Syntax
PROCEDURE DELETE_PARAMETER
(
list  
VARCHAR2
,
   key   
VARCHAR2);   
PROCEDURE DELETE_PARAMETER
(
name  
VARCHAR2,
   key   
VARCHAR2);
Built-in Type  unrestricted procedure
Enter Query Mode  yes
Parameters
list or name
Specifies the parameter list, either by list ID or name.  The actual parameter
can be either a parameter list ID of type PARAMLIST, or the
VARCHAR2 name of the parameter list.
key
The name of the parameter.  The data type of the key is VARCHAR2.
DELETE_PARAMETER restrictions
• 
Deleting the last parameter from a list does not automatically delete the list itself.  To delete the
parameter list, issue a call to the DESTROY_PARAMETER_LIST subprogram.
DELETE_PARAMETER examples
/*   
** Built-in:  DELETE_PARAMETER
** Example:   Remove the ’NUMBER_OF_COPIES’ parameter from the
**            already existing ’TEMPDATA’ parameter list.
*/
BEGIN
Delete_Parameter(’tempdata’,’number_of_copies’);
END;
82
DELETE_RECORD built-in
Description
When used outside an On-Delete trigger, removes the current record from the block and marks the record
as a delete.  Records removed with this built-in are not removed one at a time, but are added to a list of
records that are deleted during the next available commit process.
If the record corresponds to a row in the database, Form Builder locks the record before removing it and
marking it as a delete.
If a query is open in the block, Form Builder fetches a record to refill the block if necessary.  See also the
description for the CLEAR_RECORD built-in subprogram.
In an On-Delete trigger, DELETE_RECORD initiates the default Form Builder processing for deleting a
record during the Post and Commit Transaction process, as shown in Example 2 below.
Syntax
PROCEDURE DELETE_RECORD;
Built-in Type   restricted procedure
Enter Query Mode  no
Parameters
none
DELETE_RECORD examples
Example 1
/*   
** Built-in:  DELETE_RECORD
** Example:   Mark the current record in the current block for
**            deletion.
*/
BEGIN
Delete_Record;
END;
Example 2
/*   
** Built-in:  DELETE_RECORD
** Example:   Perform Form Builder delete record processing
**            during commit-time. Decide whether to use this
**            Built-in or a user exit based on a global flag
**            setup at startup by the form, perhaps based on
**            a parameter.
** trigger:   On-Delete
*/
BEGIN
/*
** Check the global flag we set during form startup
*/
IF :Global.Using_Transactional_Triggers = ’TRUE’ THEN
User_Exit(’my_delrec block=EMP’);
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